From: Rob Moline <robm@ogre.com.au> Date: Sat Jul 26, 2003 0:36pm Subject: Re: Serial communication over balanced lines (version 2)
Digitally demodulating is computer-intensive needs a DSP and seriously mathematical code. Better to use a $10 analogue V23 modem IC which gives a 1 or 0 output from the tone input. (Also has the 'mo' part, can make the V23 tones from a 1 or 0 input.) Regards, Rob At 09:05 PM 23/07/2003 +1000, you wrote: >Thanks to everyone who responded to my question a few weeks ago re serial >communication over balanced lines, and a special thank you to those who >suggested RS485 which was very attractive, but unfortunately the drivers >have a relatively low common mode voltage rating of 12 volts. > >I have chosen to use V23 which generates voice frequency tones that can be >passed through a line isolating transformer, which will protect the PIC >against damage caused by accidental cross connection (eg if the cable gets >damaged) with other circuits operating at 30 volts DC which share the same >cable. (With RS485 to 10 nodes there could be 10 driver chips to replace if >this happened ) > >I have obtained code for PIC generation of the pure sinewave tones for >transmission, but if anyone can direct me to a source of code for PIC based >demodulation of the V23 tones at the receiving end it, would be greatly >appreciated . > >Thank you again >Harry Pfeifer
From: Alex Gibson <alxx@alxx.net> Date: Sat Jul 26, 2003 3:23pm Subject: Re: in-circuit debugging
microchip icd2 a couple of mates have them. work well with the later versions of mplab About Aus$365 with the picdem2 board http://www.microchip.com/1010/pline/tools/picmicro/icds/icd2/index.htm http://www.microchip.com/1010/pline/tools/picmicro/icds/icd2/cupola/pcdmplus/index.htm http://www.microchip.com/1010/pline/tools/emulator/index.htm Also olimex make one. http://www.olimex.com/dev/pic-icd1-b.html Alex ----- Original Message ----- From: "Harry Pfeifer" <hpfeifer@d...> To: <simmstick@yahoogroups.com> Sent: Thursday, July 24, 2003 10:14 PM Subject: [simmstick] in-circuit debugging > I am interested in in-circuit debugging, primarily with 40 pin 87x chips but > I am also working with 16F84's. Don McKenzie has directed me to information > on the Dontronics website (www.dontronics.com/icd.html) on a debugger which > is sent from Brazil, which works with MPLAB. > > Can any one suggest other options > > Harry Pfeifer > > > > > > To Post a message, send it to: simmstick@e... > > To Unsubscribe, send a blank message to: simmstick-unsubscribe@e... > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > >
From: Alex Gibson <alxx@alxx.net> Date: Sat Jul 26, 2003 4:22pm Subject: Re: in-circuit debugging
----- Original Message ----- From: Andrew Smallridge To: simmstick@yahoogroups.com Sent: Friday, July 25, 2003 12:09 AM Subject: RE: [simmstick] in-circuit debugging No on the topic you asked about but you might want to look at using 18Fxx2 instead of 87x. The 18Fs are much better devices in terms of code efficiency, performance, freq range and far simpler to code now that the stupid banking requirement has gone. Andrew -----Original Message-----From: Harry Pfeifer [mailto:hpfeifer@dcsi.net.au] Sent: Thursday, 24 July 2003 8:14 PMTo: simmstick@yahoogroups.comSubject: [simmstick] in-circuit debuggingI am interested in in-circuit debugging, primarily with 40 pin 87x chips butI am also working with 16F84's. Don McKenzie has directed me to informationon the Dontronics website (www.dontronics.com/icd.html) on a debugger whichis sent from Brazil, which works with MPLAB.Can any one suggest other optionsHarry PfeiferTo Post a message, send it to: simmstick@eGroups.comTo Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.comTo Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
-----Original Message-----From: Harry Pfeifer [mailto:hpfeifer@dcsi.net.au] Sent: Thursday, 24 July 2003 8:14 PMTo: simmstick@yahoogroups.comSubject: [simmstick] in-circuit debuggingI am interested in in-circuit debugging, primarily with 40 pin 87x chips butI am also working with 16F84's. Don McKenzie has directed me to informationon the Dontronics website (www.dontronics.com/icd.html) on a debugger whichis sent from Brazil, which works with MPLAB.Can any one suggest other optionsHarry PfeiferTo Post a message, send it to: simmstick@eGroups.comTo Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
From: oldemp4 <oldemp4@yahoo.com> Date: Mon Jul 28, 2003 5:25pm Subject: Are you a military single or admirer?If you are,please check this out!
http://www.militaryfriends.com/i/5
From: roddonau <simmstick_moderator@dontronics.com> Date: Mon Jul 28, 2003 6:29pm Subject: oldemp4@yahoo.com
oldemp4@y... Why is it that these jerks go to the trouble of joining a group just to post a spam? Member removed. Don...
From: Tom Parker <tparker@netspace.net.au> Date: Mon Jul 28, 2003 10:18pm Subject: RE: oldemp4@yahoo.com
> Why is it that these jerks go to the trouble of joining a group > just to post a spam? > > Member removed. Unfortunately you can automate anything in this world with a script. I closed my infrequently used group because I couldn't be bothered verifying everyone that wanted to join (this is the only way around this I think). Cheers, Tom
From: Justin James Clayden <justy@coolfusion.com.au> Date: Thu Jul 31, 2003 3:00am Subject: DT-108 Simmstick Video
Hey Simmstickers, I've recently assembled the DT108 video on a simmstick and I'm having.. issues. The scenario: I have an onboard AVR902313 plus MAX232. I've installed the PAL crystal and verified with a multitester that it's oscillating at 17.73MHz. The symptoms: The thing seems to boot up OK, however it seems to be forever trying to get in sync- twice now it's actually worked, and I've seen a blue background with the words 'Simmstick Video' on the screen. I saw some flashing clocks too.. detail.. detail. Any clues? I'm also unsure about the role of the onboard RS232- is it only required if the onboard micro isn't used? Are these the likely scenarios? : 1. Just the video chip- other driving circuits used on other simmsticks to talk to the chip by setting levels on its pins. 2. The video chip is talked to by an onboard micro and this micro is optionally talked to be the RS232, which is receiving data via either SI/SO or TX/RX. My knowledge of these issues is a little perforated! Cheers, Justin ================================= | Justin James Clayden \ | Director, Cool Fusion Multimedia \ | mailto:justy@c... \ | http://www.coolfusion.com.au \ =======================================
From: Leon Blakeley <l.blakeley@cfa.vic.gov.au> Date: Wed Jul 30, 2003 10:03am Subject: DM74LS244WM
Hi All, DM74LS244WM Has anyone used these chips? (Octal tri-stateline driver) According to a Fairchild spec sheet, the max V-in should be 7V I have a device which has digital inouts directly vonnev\cted with no protection that I can see, the spec sheet claims input Hi of 4 - 30V !! To my reckoning that should fry the chip! The Device is a Nu-Dam ND6053, it is a RS485 controlled digital input module (16 i/p's) Yes I know a simmstik and AVR or PIC would be ideal but "management" prefer "off the shelf" I've put 16V (Supply) onto an input for 15 secs or so with no obvious ill effect, however the devices are failing in the field where the I/P is unlikely to go that hi! Any clues? Cheers -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message.
From: sammi_swallows_good6 <sammi_swallows_good6@yahoo.com> Date: Wed Jul 30, 2003 11:38am Subject: my next orgy party
hey, i'll be having another big orgy party in about 3 weeks, and wanted to send out another invitation to see who wants to come to this one. if you were at the last one, you already know how awesome it was, and you're invited again. it's at the same place, and there will be even more single girls there this time! just remember...clothing isn't even an option! ;-) come and RSVP at this link, http://www.eroticy.com/landing.asp?AFL=AYHO/ just leave me a message on my profile if you want to come, and i'll do the rest. See ya there!
From: roddonau <simmstick_moderator@dontronics.com> Date: Wed Jul 30, 2003 11:44am Subject: sammi_swallows_good6@yahoo.com
sammi_swallows_good6@y... member manually removed. these guys will destroy every newsgroup going if this keeps up. Don...
From: Ben Wirz <ben@wirz.com> Date: Wed Jul 30, 2003 1:01pm Subject: Re: sammi_swallows_good6@yahoo.com
Hey Don, I recommend you change your group settings to "New Members Moderated" It should solve your problems. Any new members will have to have their posts approved by you prior to them going through to the group. -Ben At 01:44 AM 7/30/2003 +0000, you wrote: >sammi_swallows_good6@y... > >member manually removed. > >these guys will destroy every newsgroup going if this keeps up. > >Don... > > > >To Post a message, send it to: simmstick@e... > >To Unsubscribe, send a blank message to: simmstick-unsubscribe@e... > >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Ben Wirz mailto:ben@w... Wirz Electronics, Inc http://www.wirz.com/
From: roddonau <simmstick_moderator@dontronics.com> Date: Wed Jul 30, 2003 1:24pm Subject: Re: sammi_swallows_good6@yahoo.com
--- In simmstick@yahoogroups.com, Ben Wirz <ben@w...> wrote: > Hey Don, > > I recommend you change your group settings to "New Members > Moderated" It should solve your problems. Any new members will have to > have their posts approved by you prior to them going through to the group a good idea Ben, the only trouble is I get so much spam through my moderator address, that I delete all mail going to it automatically, and keep in contact with the group as a member. It is easier for me to remove the occassional spammer that signs up as a member, than go through the mountain of spams I get as a moderator. Yahoo doesn't want to know about the problem. If the problem increases, them I may have to reconsider my options. Don...
From: Andrew Smallridge <asmallri@hotmail.com> Date: Wed Jul 30, 2003 2:00pm Subject: RE: DM74LS244WM
-----Original Message-----From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Wednesday, 30 July 2003 8:04 AMTo: SimmstickSubject: [simmstick] DM74LS244WMHi All,DM74LS244WMHas anyone used these chips? (Octal tri-stateline driver) Accordingto a Fairchild spec sheet, the max V-in should be 7VI have a device which has digital inouts directly vonnev\cted with noprotection that I can see, the spec sheet claims input Hi of 4 - 30V !!To my reckoning that should fry the chip!The Device is a Nu-Dam ND6053, it is a RS485 controlled digital inputmodule (16 i/p's)Yes I know a simmstik and AVR or PIC would be ideal but "management"prefer "off the shelf"I've put 16V (Supply) onto an input for 15 secs or so with no obviousill effect, however the devices are failing in the field where the I/Pis unlikely to go that hi!Any clues?Cheers--Leon BlakeleyCFA CommunicationsPh (03) 92628400Fax (03) 92628383PO Box 701Mt. Waverley3149/_\ This message transmitted on 100% recycled electrons.CAUTION - This message is intended for the use of the individual orentity named above and may contain information If you are not theintended recipient of this message youare hereby notified that any use, dissemination, distribution orreproduction of this message is prohibited and that you must not takeany action in reliance on it. If you have received this communicationin error, please notify CFA immediately and destroy the originalmessage.To Post a message, send it to: simmstick@eGroups.comTo Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
From: Leon Blakeley <l.blakeley@cfa.vic.gov.au> Date: Wed Jul 30, 2003 2:33pm Subject: Re: DM74LS244WM
Andrew Smallridge wrote:
Which device is failing in the field the 74LS244?The Nu-Dam ND6053 contains an internal power supply to regulate the incoming 10-to-30 power supply inputs to 5V. The digital inputs are TTL compatible. Putting a higher voltage on the inputs could damage it depending on how they have inplemented input protection.I suggest you look at the common ground between your logic and the ND6053. It is possible you have a ground differential which is causing the problems.Regards, Andrew -----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Wednesday, 30 July 2003 8:04 AM To: Simmstick Subject: [simmstick] DM74LS244WM Hi All, DM74LS244WM Has anyone used these chips? (Octal tri-stateline driver) According to a Fairchild spec sheet, the max V-in should be 7V I have a device which has digital inouts directly vonnev\cted with no protection that I can see, the spec sheet claims input Hi of 4 - 30V !! To my reckoning that should fry the chip! The Device is a Nu-Dam ND6053, it is a RS485 controlled digital input module (16 i/p's) Yes I know a simmstik and AVR or PIC would be ideal but "management" prefer "off the shelf" I've put 16V (Supply) onto an input for 15 secs or so with no obvious ill effect, however the devices are failing in the field where the I/P is unlikely to go that hi! Any clues? Cheers -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
-----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Wednesday, 30 July 2003 8:04 AM To: Simmstick Subject: [simmstick] DM74LS244WM Hi All, DM74LS244WM Has anyone used these chips? (Octal tri-stateline driver) According to a Fairchild spec sheet, the max V-in should be 7V I have a device which has digital inouts directly vonnev\cted with no protection that I can see, the spec sheet claims input Hi of 4 - 30V !! To my reckoning that should fry the chip! The Device is a Nu-Dam ND6053, it is a RS485 controlled digital input module (16 i/p's) Yes I know a simmstik and AVR or PIC would be ideal but "management" prefer "off the shelf" I've put 16V (Supply) onto an input for 15 secs or so with no obvious ill effect, however the devices are failing in the field where the I/P is unlikely to go that hi! Any clues? Cheers -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
-- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383
PO Box 701 Mt. Waverley 3149
/_\ This message transmitted on 100% recycled electrons.
CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message.
To Post a message, send it to: simmstick@eGroups.com
To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
From: Alf Katz <alfkatz@ieee.org> Date: Wed Jul 30, 2003 3:05pm Subject: Re: DM74LS244WM
----- Original Message ----- From: Leon Blakeley To: simmstick@yahoogroups.com Sent: Wednesday, July 30, 2003 2:33 PM Subject: Re: [simmstick] DM74LS244WM Hi Andrew, Yes the 74LS244, but some have the "default" input damaged, the documentation warns against taking that high, but they claim a "Hi i/p" is between 4 and 30V, as far as I've been able to ascertain the i/p pins are internally pulled to Vcc (5V) but they are directly connected to the 74LS244 with only a 10k pullup and a diode (cathode to I/P). They aren't failing in the field as such, the techs are killing them at programming stage! they have to set an adress and "checksum enable". Sometimes what ever they do happens while the " link" is in the programming position, then they kill the micro (winbond 8051?) There is little support and documentation is limited and contradictory! I'm disappointed as they looked like a great device for distributed I/O! Thanks foy your answer Cheers Leon Andrew Smallridge wrote: Which device is failing in the field the 74LS244?The Nu-Dam ND6053 contains an internal power supply to regulate the incoming 10-to-30 power supply inputs to 5V. The digital inputs are TTL compatible. Putting a higher voltage on the inputs could damage it depending on how they have inplemented input protection.I suggest you look at the common ground between your logic and the ND6053. It is possible you have a ground differential which is causing the problems.Regards, Andrew -----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Wednesday, 30 July 2003 8:04 AM To: Simmstick Subject: [simmstick] DM74LS244WM Hi All, DM74LS244WM Has anyone used these chips? (Octal tri-stateline driver) According to a Fairchild spec sheet, the max V-in should be 7V I have a device which has digital inouts directly vonnev\cted with no protection that I can see, the spec sheet claims input Hi of 4 - 30V !! To my reckoning that should fry the chip! The Device is a Nu-Dam ND6053, it is a RS485 controlled digital input module (16 i/p's) Yes I know a simmstik and AVR or PIC would be ideal but "management" prefer "off the shelf" I've put 16V (Supply) onto an input for 15 secs or so with no obvious ill effect, however the devices are failing in the field where the I/P is unlikely to go that hi! Any clues? Cheers -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.comTo Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.comTo Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
From: Alf Katz <alfkatz@ieee.org> Date: Wed Jul 30, 2003 3:31pm Subject: Re: DM74LS244WM
----- Original Message ----- From: Alf Katz To: simmstick@yahoogroups.com Sent: Wednesday, July 30, 2003 3:05 PM Subject: Re: [simmstick] DM74LS244WM This particular clone of the Advantech ADAM 4053 is not suitable for 4-30V operation at all. The datasheet specifically says that it is suitable for dry contact (voltage free contact e.g. relay closure) or TTL voltages only. This is not the right device for your application. The only part of this device that can handle 30V is the power supply input. See the data sheet at http://www.adlinktech.com/publications/manual/ND6000/ND6053Sheet.pdf This is not the right part for your application. I suggest the original Advantech ADAM 4053 does have 4-30V inputs. Are you sure you were looking at the clone data sheet, not the original? Cheers Alf Katz alfkatz@remove.the.obvious.ieee.org www.micromagic.net.au ----- Original Message ----- From: Leon Blakeley To: simmstick@yahoogroups.com Sent: Wednesday, July 30, 2003 2:33 PM Subject: Re: [simmstick] DM74LS244WM Hi Andrew, Yes the 74LS244, but some have the "default" input damaged, the documentation warns against taking that high, but they claim a "Hi i/p" is between 4 and 30V, as far as I've been able to ascertain the i/p pins are internally pulled to Vcc (5V) but they are directly connected to the 74LS244 with only a 10k pullup and a diode (cathode to I/P). They aren't failing in the field as such, the techs are killing them at programming stage! they have to set an adress and "checksum enable". Sometimes what ever they do happens while the " link" is in the programming position, then they kill the micro (winbond 8051?) There is little support and documentation is limited and contradictory! I'm disappointed as they looked like a great device for distributed I/O! Thanks foy your answer Cheers Leon Andrew Smallridge wrote: Which device is failing in the field the 74LS244?The Nu-Dam ND6053 contains an internal power supply to regulate the incoming 10-to-30 power supply inputs to 5V. The digital inputs are TTL compatible. Putting a higher voltage on the inputs could damage it depending on how they have inplemented input protection.I suggest you look at the common ground between your logic and the ND6053. It is possible you have a ground differential which is causing the problems.Regards, Andrew -----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Wednesday, 30 July 2003 8:04 AM To: Simmstick Subject: [simmstick] DM74LS244WM Hi All, DM74LS244WM Has anyone used these chips? (Octal tri-stateline driver) According to a Fairchild spec sheet, the max V-in should be 7V I have a device which has digital inouts directly vonnev\cted with no protection that I can see, the spec sheet claims input Hi of 4 - 30V !! To my reckoning that should fry the chip! The Device is a Nu-Dam ND6053, it is a RS485 controlled digital input module (16 i/p's) Yes I know a simmstik and AVR or PIC would be ideal but "management" prefer "off the shelf" I've put 16V (Supply) onto an input for 15 secs or so with no obvious ill effect, however the devices are failing in the field where the I/P is unlikely to go that hi! Any clues? Cheers -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.comTo Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.comTo Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
From: Leon Blakeley <l.blakeley@cfa.vic.gov.au> Date: Wed Jul 30, 2003 3:39pm Subject: Re: DM74LS244WM
¨ Input · Channel numbers : 16 · Dry Contact: · Logical level 0 : close to GND · Logical level 1 : open · Wet Contact : · Logical level 0 : +2V max. · Logical level 1 : +4V ~ + 30V
Those levels are certainly not "TTL". In hindsight I should have realised when I found that it operated at TTL levels! I first saw the "Adam", but when I tried to find it, there wasn't an equivalent of the 6053 (I didn't see it), though most others were there, I found three or four "clones" but was unaware which was the "original" Thanks for the info, I'll go and harass the supplier!! (with out much hope of any help) Cheers Leon
Alf Katz wrote:
This particular clone of the Advantech ADAM 4053 is not suitable for 4-30V operation at all. The datasheet specifically says that it is suitable for dry contact (voltage free contact e.g. relay closure) or TTL voltages only. This is not the right device for your application. The only part of this device that can handle 30V is the power supply input. See the data sheet at http://www.adlinktech.com/publications/manual/ND6000/ND6053Sheet.pdf This is not the right part for your application. I suggest the original Advantech ADAM 4053 does have 4-30V inputs. Are you sure you were looking at the clone data sheet, not the original? CheersAlf Katz alfkatz@remove.the.obvious.ieee.orgwww.micromagic.net.au ----- Original Message ----- From: Leon Blakeley To: simmstick@yahoogroups.com Sent: Wednesday, July 30, 2003 2:33 PM Subject: Re: [simmstick] DM74LS244WM Hi Andrew, Yes the 74LS244, but some have the "default" input damaged, the documentation warns against taking that high, but they claim a "Hi i/p" is between 4 and 30V, as far as I've been able to ascertain the i/p pins are internally pulled to Vcc (5V) but they are directly connected to the 74LS244 with only a 10k pullup and a diode (cathode to I/P). They aren't failing in the field as such, the techs are killing them at programming stage! they have to set an adress and "checksum enable". Sometimes what ever they do happens while the " link" is in the programming position, then they kill the micro (winbond 8051?) There is little support and documentation is limited and contradictory! I'm disappointed as they looked like a great device for distributed I/O! Thanks foy your answer Cheers Leon Andrew Smallridge wrote: Which device is failing in the field the 74LS244?The Nu-Dam ND6053 contains an internal power supply to regulate the incoming 10-to-30 power supply inputs to 5V. The digital inputs are TTL compatible. Putting a higher voltage on the inputs could damage it depending on how they have inplemented input protection.I suggest you look at the common ground between your logic and the ND6053. It is possible you have a ground differential which is causing the problems.Regards, Andrew -----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Wednesday, 30 July 2003 8:04 AM To: Simmstick Subject: [simmstick] DM74LS244WM Hi All, DM74LS244WM Has anyone used these chips? (Octal tri-stateline driver) According to a Fairchild spec sheet, the max V-in should be 7V I have a device which has digital inouts directly vonnev\cted with no protection that I can see, the spec sheet claims input Hi of 4 - 30V !! To my reckoning that should fry the chip! The Device is a Nu-Dam ND6053, it is a RS485 controlled digital input module (16 i/p's) Yes I know a simmstik and AVR or PIC would be ideal but "management" prefer "off the shelf" I've put 16V (Supply) onto an input for 15 secs or so with no obvious ill effect, however the devices are failing in the field where the I/P is unlikely to go that hi! Any clues? Cheers -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
----- Original Message ----- From: Leon Blakeley To: simmstick@yahoogroups.com Sent: Wednesday, July 30, 2003 2:33 PM Subject: Re: [simmstick] DM74LS244WM Hi Andrew, Yes the 74LS244, but some have the "default" input damaged, the documentation warns against taking that high, but they claim a "Hi i/p" is between 4 and 30V, as far as I've been able to ascertain the i/p pins are internally pulled to Vcc (5V) but they are directly connected to the 74LS244 with only a 10k pullup and a diode (cathode to I/P). They aren't failing in the field as such, the techs are killing them at programming stage! they have to set an adress and "checksum enable". Sometimes what ever they do happens while the " link" is in the programming position, then they kill the micro (winbond 8051?) There is little support and documentation is limited and contradictory! I'm disappointed as they looked like a great device for distributed I/O! Thanks foy your answer Cheers Leon Andrew Smallridge wrote: Which device is failing in the field the 74LS244?The Nu-Dam ND6053 contains an internal power supply to regulate the incoming 10-to-30 power supply inputs to 5V. The digital inputs are TTL compatible. Putting a higher voltage on the inputs could damage it depending on how they have inplemented input protection.I suggest you look at the common ground between your logic and the ND6053. It is possible you have a ground differential which is causing the problems.Regards, Andrew -----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Wednesday, 30 July 2003 8:04 AM To: Simmstick Subject: [simmstick] DM74LS244WM Hi All, DM74LS244WM Has anyone used these chips? (Octal tri-stateline driver) According to a Fairchild spec sheet, the max V-in should be 7V I have a device which has digital inouts directly vonnev\cted with no protection that I can see, the spec sheet claims input Hi of 4 - 30V !! To my reckoning that should fry the chip! The Device is a Nu-Dam ND6053, it is a RS485 controlled digital input module (16 i/p's) Yes I know a simmstik and AVR or PIC would be ideal but "management" prefer "off the shelf" I've put 16V (Supply) onto an input for 15 secs or so with no obvious ill effect, however the devices are failing in the field where the I/P is unlikely to go that hi! Any clues? Cheers -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
From: Justin James Clayden <justy@coolfusion.com.au> Date: Thu Jul 31, 2003 8:45am Subject: RE: DM74LS244WM
-----Original Message-----From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au]Sent: Tuesday, July 29, 2003 10:39 PMTo: simmstick@yahoogroups.comSubject: Re: [simmstick] DM74LS244WMThanks for the reply, this is from the "manual" that was supplied when we asked that the "datasheet" be clarified. ¨ Input · Channel numbers : 16 · Dry Contact: · Logical level 0 : close to GND · Logical level 1 : open · Wet Contact : · Logical level 0 : +2V max. · Logical level 1 : +4V ~ + 30V Those levels are certainly not "TTL". In hindsight I should have realised when I found that it operated at TTL levels! I first saw the "Adam", but when I tried to find it, there wasn't an equivalent of the 6053 (I didn't see it), though most others were there, I found three or four "clones" but was unaware which was the "original" Thanks for the info, I'll go and harass the supplier!! (with out much hope of any help) Cheers Leon Alf Katz wrote: This particular clone of the Advantech ADAM 4053 is not suitable for 4-30V operation at all. The datasheet specifically says that it is suitable for dry contact (voltage free contact e.g. relay closure) or TTL voltages only. This is not the right device for your application. The only part of this device that can handle 30V is the power supply input. See the data sheet at http://www.adlinktech.com/publications/manual/ND6000/ND6053Sheet.pdf This is not the right part for your application. I suggest the original Advantech ADAM 4053 does have 4-30V inputs. Are you sure you were looking at the clone data sheet, not the original? CheersAlf Katz alfkatz@remove.the.obvious.ieee.orgwww.micromagic.net.au ----- Original Message ----- From: Leon Blakeley To: simmstick@yahoogroups.com Sent: Wednesday, July 30, 2003 2:33 PM Subject: Re: [simmstick] DM74LS244WM Hi Andrew, Yes the 74LS244, but some have the "default" input damaged, the documentation warns against taking that high, but they claim a "Hi i/p" is between 4 and 30V, as far as I've been able to ascertain the i/p pins are internally pulled to Vcc (5V) but they are directly connected to the 74LS244 with only a 10k pullup and a diode (cathode to I/P). They aren't failing in the field as such, the techs are killing them at programming stage! they have to set an adress and "checksum enable". Sometimes what ever they do happens while the " link" is in the programming position, then they kill the micro (winbond 8051?) There is little support and documentation is limited and contradictory! I'm disappointed as they looked like a great device for distributed I/O! Thanks foy your answer Cheers Leon Andrew Smallridge wrote: Which device is failing in the field the 74LS244?The Nu-Dam ND6053 contains an internal power supply to regulate the incoming 10-to-30 power supply inputs to 5V. The digital inputs are TTL compatible. Putting a higher voltage on the inputs could damage it depending on how they have inplemented input protection.I suggest you look at the common ground between your logic and the ND6053. It is possible you have a ground differential which is causing the problems.Regards, Andrew -----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Wednesday, 30 July 2003 8:04 AM To: Simmstick Subject: [simmstick] DM74LS244WMHi All, DM74LS244WM Has anyone used these chips? (Octal tri-stateline driver) According to a Fairchild spec sheet, the max V-in should be 7V I have a device which has digital inouts directly vonnev\cted with no protection that I can see, the spec sheet claims input Hi of 4 - 30V !! To my reckoning that should fry the chip! The Device is a Nu-Dam ND6053, it is a RS485 controlled digital input module (16 i/p's) Yes I know a simmstik and AVR or PIC would be ideal but "management" prefer "off the shelf" I've put 16V (Supply) onto an input for 15 secs or so with no obvious ill effect, however the devices are failing in the field where the I/P is unlikely to go that hi! Any clues? Cheers -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.-- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message.
This particular clone of the Advantech ADAM 4053 is not suitable for 4-30V operation at all. The datasheet specifically says that it is suitable for dry contact (voltage free contact e.g. relay closure) or TTL voltages only. This is not the right device for your application. The only part of this device that can handle 30V is the power supply input. See the data sheet at http://www.adlinktech.com/publications/manual/ND6000/ND6053Sheet.pdf This is not the right part for your application. I suggest the original Advantech ADAM 4053 does have 4-30V inputs. Are you sure you were looking at the clone data sheet, not the original? CheersAlf Katz alfkatz@remove.the.obvious.ieee.orgwww.micromagic.net.au ----- Original Message ----- From: Leon Blakeley To: simmstick@yahoogroups.com Sent: Wednesday, July 30, 2003 2:33 PM Subject: Re: [simmstick] DM74LS244WM Hi Andrew, Yes the 74LS244, but some have the "default" input damaged, the documentation warns against taking that high, but they claim a "Hi i/p" is between 4 and 30V, as far as I've been able to ascertain the i/p pins are internally pulled to Vcc (5V) but they are directly connected to the 74LS244 with only a 10k pullup and a diode (cathode to I/P). They aren't failing in the field as such, the techs are killing them at programming stage! they have to set an adress and "checksum enable". Sometimes what ever they do happens while the " link" is in the programming position, then they kill the micro (winbond 8051?) There is little support and documentation is limited and contradictory! I'm disappointed as they looked like a great device for distributed I/O! Thanks foy your answer Cheers Leon Andrew Smallridge wrote: Which device is failing in the field the 74LS244?The Nu-Dam ND6053 contains an internal power supply to regulate the incoming 10-to-30 power supply inputs to 5V. The digital inputs are TTL compatible. Putting a higher voltage on the inputs could damage it depending on how they have inplemented input protection.I suggest you look at the common ground between your logic and the ND6053. It is possible you have a ground differential which is causing the problems.Regards, Andrew -----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Wednesday, 30 July 2003 8:04 AM To: Simmstick Subject: [simmstick] DM74LS244WMHi All, DM74LS244WM Has anyone used these chips? (Octal tri-stateline driver) According to a Fairchild spec sheet, the max V-in should be 7V I have a device which has digital inouts directly vonnev\cted with no protection that I can see, the spec sheet claims input Hi of 4 - 30V !! To my reckoning that should fry the chip! The Device is a Nu-Dam ND6053, it is a RS485 controlled digital input module (16 i/p's) Yes I know a simmstik and AVR or PIC would be ideal but "management" prefer "off the shelf" I've put 16V (Supply) onto an input for 15 secs or so with no obvious ill effect, however the devices are failing in the field where the I/P is unlikely to go that hi! Any clues? Cheers -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.-- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
----- Original Message ----- From: Leon Blakeley To: simmstick@yahoogroups.com Sent: Wednesday, July 30, 2003 2:33 PM Subject: Re: [simmstick] DM74LS244WM Hi Andrew, Yes the 74LS244, but some have the "default" input damaged, the documentation warns against taking that high, but they claim a "Hi i/p" is between 4 and 30V, as far as I've been able to ascertain the i/p pins are internally pulled to Vcc (5V) but they are directly connected to the 74LS244 with only a 10k pullup and a diode (cathode to I/P). They aren't failing in the field as such, the techs are killing them at programming stage! they have to set an adress and "checksum enable". Sometimes what ever they do happens while the " link" is in the programming position, then they kill the micro (winbond 8051?) There is little support and documentation is limited and contradictory! I'm disappointed as they looked like a great device for distributed I/O! Thanks foy your answer Cheers Leon Andrew Smallridge wrote: Which device is failing in the field the 74LS244?The Nu-Dam ND6053 contains an internal power supply to regulate the incoming 10-to-30 power supply inputs to 5V. The digital inputs are TTL compatible. Putting a higher voltage on the inputs could damage it depending on how they have inplemented input protection.I suggest you look at the common ground between your logic and the ND6053. It is possible you have a ground differential which is causing the problems.Regards, Andrew -----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Wednesday, 30 July 2003 8:04 AM To: Simmstick Subject: [simmstick] DM74LS244WMHi All, DM74LS244WM Has anyone used these chips? (Octal tri-stateline driver) According to a Fairchild spec sheet, the max V-in should be 7V I have a device which has digital inouts directly vonnev\cted with no protection that I can see, the spec sheet claims input Hi of 4 - 30V !! To my reckoning that should fry the chip! The Device is a Nu-Dam ND6053, it is a RS485 controlled digital input module (16 i/p's) Yes I know a simmstik and AVR or PIC would be ideal but "management" prefer "off the shelf" I've put 16V (Supply) onto an input for 15 secs or so with no obvious ill effect, however the devices are failing in the field where the I/P is unlikely to go that hi! Any clues? Cheers -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.-- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Which device is failing in the field the 74LS244?The Nu-Dam ND6053 contains an internal power supply to regulate the incoming 10-to-30 power supply inputs to 5V. The digital inputs are TTL compatible. Putting a higher voltage on the inputs could damage it depending on how they have inplemented input protection.I suggest you look at the common ground between your logic and the ND6053. It is possible you have a ground differential which is causing the problems.Regards, Andrew -----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Wednesday, 30 July 2003 8:04 AM To: Simmstick Subject: [simmstick] DM74LS244WMHi All, DM74LS244WM Has anyone used these chips? (Octal tri-stateline driver) According to a Fairchild spec sheet, the max V-in should be 7V I have a device which has digital inouts directly vonnev\cted with no protection that I can see, the spec sheet claims input Hi of 4 - 30V !! To my reckoning that should fry the chip! The Device is a Nu-Dam ND6053, it is a RS485 controlled digital input module (16 i/p's) Yes I know a simmstik and AVR or PIC would be ideal but "management" prefer "off the shelf" I've put 16V (Supply) onto an input for 15 secs or so with no obvious ill effect, however the devices are failing in the field where the I/P is unlikely to go that hi! Any clues? Cheers -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
-----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Wednesday, 30 July 2003 8:04 AM To: Simmstick Subject: [simmstick] DM74LS244WMHi All, DM74LS244WM Has anyone used these chips? (Octal tri-stateline driver) According to a Fairchild spec sheet, the max V-in should be 7V I have a device which has digital inouts directly vonnev\cted with no protection that I can see, the spec sheet claims input Hi of 4 - 30V !! To my reckoning that should fry the chip! The Device is a Nu-Dam ND6053, it is a RS485 controlled digital input module (16 i/p's) Yes I know a simmstik and AVR or PIC would be ideal but "management" prefer "off the shelf" I've put 16V (Supply) onto an input for 15 secs or so with no obvious ill effect, however the devices are failing in the field where the I/P is unlikely to go that hi! Any clues? Cheers -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
From: Alf Katz <alfkatz@ieee.org> Date: Wed Jul 30, 2003 4:13pm Subject: Re: DM74LS244WM
----- Original Message ----- From: Leon Blakeley To: simmstick@yahoogroups.com Sent: Wednesday, July 30, 2003 3:39 PM Subject: Re: [simmstick] DM74LS244WM Thanks for the reply, this is from the "manual" that was supplied when we asked that the "datasheet" be clarified. ¨ Input · Channel numbers : 16 · Dry Contact: · Logical level 0 : close to GND · Logical level 1 : open · Wet Contact : · Logical level 0 : +2V max. · Logical level 1 : +4V ~ + 30V Those levels are certainly not "TTL". In hindsight I should have realised when I found that it operated at TTL levels! I first saw the "Adam", but when I tried to find it, there wasn't an equivalent of the 6053 (I didn't see it), though most others were there, I found three or four "clones" but was unaware which was the "original" Thanks for the info, I'll go and harass the supplier!! (with out much hope of any help) Cheers Leon Alf Katz wrote: This particular clone of the Advantech ADAM 4053 is not suitable for 4-30V operation at all. The datasheet specifically says that it is suitable for dry contact (voltage free contact e.g. relay closure) or TTL voltages only. This is not the right device for your application. The only part of this device that can handle 30V is the power supply input. See the data sheet at http://www.adlinktech.com/publications/manual/ND6000/ND6053Sheet.pdf This is not the right part for your application. I suggest the original Advantech ADAM 4053 does have 4-30V inputs. Are you sure you were looking at the clone data sheet, not the original? CheersAlf Katz alfkatz@remove.the.obvious.ieee.orgwww.micromagic.net.au ----- Original Message ----- From: Leon Blakeley To: simmstick@yahoogroups.com Sent: Wednesday, July 30, 2003 2:33 PM Subject: Re: [simmstick] DM74LS244WM Hi Andrew, Yes the 74LS244, but some have the "default" input damaged, the documentation warns against taking that high, but they claim a "Hi i/p" is between 4 and 30V, as far as I've been able to ascertain the i/p pins are internally pulled to Vcc (5V) but they are directly connected to the 74LS244 with only a 10k pullup and a diode (cathode to I/P). They aren't failing in the field as such, the techs are killing them at programming stage! they have to set an adress and "checksum enable". Sometimes what ever they do happens while the " link" is in the programming position, then they kill the micro (winbond 8051?) There is little support and documentation is limited and contradictory! I'm disappointed as they looked like a great device for distributed I/O! Thanks foy your answer Cheers Leon Andrew Smallridge wrote: Which device is failing in the field the 74LS244?The Nu-Dam ND6053 contains an internal power supply to regulate the incoming 10-to-30 power supply inputs to 5V. The digital inputs are TTL compatible. Putting a higher voltage on the inputs could damage it depending on how they have inplemented input protection.I suggest you look at the common ground between your logic and the ND6053. It is possible you have a ground differential which is causing the problems.Regards, Andrew -----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Wednesday, 30 July 2003 8:04 AM To: Simmstick Subject: [simmstick] DM74LS244WMHi All, DM74LS244WM Has anyone used these chips? (Octal tri-stateline driver) According to a Fairchild spec sheet, the max V-in should be 7V I have a device which has digital inouts directly vonnev\cted with no protection that I can see, the spec sheet claims input Hi of 4 - 30V !! To my reckoning that should fry the chip! The Device is a Nu-Dam ND6053, it is a RS485 controlled digital input module (16 i/p's) Yes I know a simmstik and AVR or PIC would be ideal but "management" prefer "off the shelf" I've put 16V (Supply) onto an input for 15 secs or so with no obvious ill effect, however the devices are failing in the field where the I/P is unlikely to go that hi! Any clues? Cheers -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.-- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. To Post a message, send it to: simmstick@eGroups.com To Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. -- Leon Blakeley CFA Communications Ph (03) 92628400 Fax (03) 92628383 PO Box 701 Mt. Waverley 3149 /_\ This message transmitted on 100% recycled electrons. CAUTION - This message is intended for the use of the individual or entity named above and may contain information If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited and that you must not take any action in reliance on it. If you have received this communication in error, please notify CFA immediately and destroy the original message.
From: Leon Blakeley <l.blakeley@cfa.vic.gov.au> Date: Wed Jul 30, 2003 5:04pm Subject: Re: DM74LS244WM
Justin James Clayden wrote:
Why, may I ask, is there an advertisement attached to this (Leon's) email?Justin Clayden -----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Tuesday, July 29, 2003 10:39 PM To: simmstick@yahoogroups.com Subject: Re: [simmstick] DM74LS244WM Thanks for the reply, this is from the "manual" that was supplied when we asked that the "datasheet" be clarified. ¨ Input · Channel numbers : 16 · Dry Contact: · Logical level 0 : close to GND · Logical level 1 : open · Wet Contact : · Logical level 0 : +2V max. · Logical level 1 : +4V ~ + 30V Those levels are certainly not "TTL". In hindsight I should have realised when I found that it operated at TTL levels! I first saw the "Adam", but when I tried to find it, there wasn't an equivalent of the 6053 (I didn't see it), though most others were there, I found three or four "clones" but was unaware which was the "original" Thanks for the info, I'll go and harass the supplier!! (with out much hope of any help) Cheers Leon Alf Katz wrote:
-----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Tuesday, July 29, 2003 10:39 PM To: simmstick@yahoogroups.com Subject: Re: [simmstick] DM74LS244WM Thanks for the reply, this is from the "manual" that was supplied when we asked that the "datasheet" be clarified. ¨ Input · Channel numbers : 16 · Dry Contact: · Logical level 0 : close to GND · Logical level 1 : open · Wet Contact : · Logical level 0 : +2V max. · Logical level 1 : +4V ~ + 30V Those levels are certainly not "TTL". In hindsight I should have realised when I found that it operated at TTL levels! I first saw the "Adam", but when I tried to find it, there wasn't an equivalent of the 6053 (I didn't see it), though most others were there, I found three or four "clones" but was unaware which was the "original" Thanks for the info, I'll go and harass the supplier!! (with out much hope of any help) Cheers Leon Alf Katz wrote:
From: Justin James Clayden <justy@coolfusion.com.au> Date: Fri Aug 1, 2003 3:08am Subject: RE: DM74LS244WM
Hi Justin, you may well ask. I can't answer you though. Was the ad on my original post, As I sent it I didn't read it and deleted it without looking. If it came from here I apologise and would apreciate advice on how to avoid that in future! Cheers PS I hope I haven't sent it back again! [Justin James Clayden] Nope, this email was attachment free- the one last time had some ad for weight loss. By the look of your email address you don't have a hotmail account, so it's a mystery how it got there! Sorry to be a net nazi, but my pet hate is ads! Cheers, Justin Justin James Clayden wrote: Why, may I ask, is there an advertisement attached to this (Leon's) email?Justin Clayden -----Original Message----- From: Leon Blakeley [mailto:l.blakeley@cfa.vic.gov.au] Sent: Tuesday, July 29, 2003 10:39 PM To: simmstick@yahoogroups.com Subject: Re: [simmstick] DM74LS244WM Thanks for the reply, this is from the "manual" that was supplied when we asked that the "datasheet" be clarified. ¨ Input · Channel numbers : 16 · Dry Contact: · Logical level 0 : close to GND · Logical level 1 : open · Wet Contact : · Logical level 0 : +2V max. · Logical level 1 : +4V ~ + 30V Those levels are certainly not "TTL". In hindsight I should have realised when I found that it operated at TTL levels! I first saw the "Adam", but when I tried to find it, there wasn't an equivalent of the 6053 (I didn't see it), though most others were there, I found three or four "clones" but was unaware which was the "original" Thanks for the info, I'll go and harass the supplier!! (with out much hope of any help) Cheers Leon Alf Katz wrote:To Post a message, send it to: simmstick@eGroups.comTo Unsubscribe, send a blank message to: simmstick-unsubscribe@eGroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
From: Don McKenzie <simmstick_member@dontronics.com> Date: Fri Aug 1, 2003 8:45am Subject: PicoServio Controller.
1-Aug-2003 PicoServio Controller. Applications such as industrial control, animatronics, walking pods, mobile robots. http://www.dontronics.com/picobytes.html 31-Jul-2003 DIY KIT-165 Printer Port to 8-Relay Outputs. http://www.dontronics.com/diyk165.html -- Don McKenzie E-mail: http://www.dontronics.com/e-mail.html Home Page: http://www.dontronics.com Add USB to your favorite Micro. http://www.dontronics.com/dlp.html The World's Largest Range of Atmel/AVR & PICmicro Hardware and Software
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From: roddonau <simmstick_moderator@dontronics.com> Date: Tue Aug 5, 2003 4:53am Subject: Re: cuummmonme12@yahoo.com
cuummmonme12@y... member removed Don...
From: andy <musica@madasafish.com> Date: Tue Aug 5, 2003 8:08am Subject: Re: Re: cuummmonme12@yahoo.com
> From: "roddonau" <simmstick_moderator@d...> > cuummmonme12@y... > member removed Nicely phrased Don!
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From: Don McKenzie <simmstick_member@dontronics.com> Date: Wed Aug 13, 2003 4:59pm Subject: PIC Programer / Analyzer.
13-Aug-2003 PIC Programer / Analyzer. This unit is assembled and Tested. Designed to be used as a development tool for designing software for MICROCHIP Microcontroller. PIC Analyzer is composed of two separate parts which operate independently: ISP - Programmer for MICROCHIP Microcontrollers Digital analyzer with capability of sampling up to 4 MPS (Mega-samples per second) http://www.dontronics.com/newhardwarefound.html -- Don McKenzie E-mail: http://www.dontronics.com/e-mail.html Home Page: http://www.dontronics.com Add USB to your favorite Micro. http://www.dontronics.com/dlp.html The World's Largest Range of Atmel/AVR & PICmicro Hardware and Software
From: vmk7486 <vmk7486@yahoo.com> Date: Thu Aug 14, 2003 6:30am Subject: Free 74ACT843 samples
I want some samples of 74AC843 (Fairchild latches). Somebody please let me know where I can get it form. It is not available in Fairchild. Thank YOu, Vignesh
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