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940-0272A as RS232

APC UPS for Home and Office Forum

Schneider Electric support forum for our APC offers including Home Office UPS, Surge Protectors, UTS, software and services and associated products designed to share knowledge, installation, and configuration.

Solved
watts_apc
Crewman
Crewman
0 Likes
9
483

940-0272A as RS232

This was originally posted on APC forums on 10/17/2010


Hi!
i have cable USB-To-RS232 (940-0272A) at home, got it from friend, no UPS

I wonder if it has normal pinout or if pinout is different from normal RS-232 pinout?
i heard that APC's smart-signalling cables have data pins on 1 and 2?

Can anyone pop me up pinout pic so i can make pinout combo? I'd be really thankfull 🙂


Thanks, bye
watts


Accepted Solutions
watts_apc
Crewman
Crewman
0 Likes
0
483

940-0272A as RS232

This was originally posted on APC forums on 10/17/2010


Hi!
i have cable USB-To-RS232 (940-0272A) at home, got it from friend, no UPS

I wonder if it has normal pinout or if pinout is different from normal RS-232 pinout?
i heard that APC's smart-signalling cables have data pins on 1 and 2?

Can anyone pop me up pinout pic so i can make pinout combo? I'd be really thankfull 🙂


Thanks, bye
watts

See Answer In Context

9 Replies 9
BillP
Administrator Administrator
Administrator
0 Likes
0
483

Re: 940-0272A as RS232

This reply was originally posted by Angela on APC forums on 10/18/2010


these cables are proprietary and do have different pinouts. we cannot give the pinouts to the cables on here unfortunately since they are indeed proprietary.

voidstar_apc
Janeway
Janeway
0 Likes
0
483

Re: 940-0272A as RS232

This was originally posted on APC forums on 10/18/2010


>
Agh crap. Well what about tearing the 2nd half from PLchip to the COM site off and soldering our own connector? pinouts then sould be known! 😕
>

You might also want to check out this APC knowledgebase article: [computer interface port specifications |http://nam-en.apc.com/app/answers/detail/a_id/1481/kw/Computer%20Interface].

watts_apc
Crewman
Crewman
0 Likes
0
483

Re: 940-0272A as RS232

This was originally posted on APC forums on 10/19/2010


Thanks for link. What i stratched out:

1) Pins 3, 5, and 6 are open collector outputs which must be pulled up to a common referenced supply no greater than +40 Vdc.
The transistors are capable of a maximum non-inductive load of 25 mAdc.
Use only pin 4 as the common.
2) Pin 2 generates a low to high transition at RS-232 levels when the UPS signals that it is on-battery.
Pin 2 is also the RS-232 data output (TXD).
3) The UPS will shut down when a high RS-232 level is sustained on pin 1 for 4.5 seconds.
The UPS responds to this signal only after a delay and during a power utility failure (when the UPS is operating on battery).
Pin 1 is also the RS-232 data input (RXD).
4) Apply a momentary (approximately 1 second) high RS-232 level to pin 7 to turn on the UPS and any attached loads.
A momentary low turns off the UPS and its load.
Pin 7 should be unconnected normally.
5) DC operating voltage is available at pin8>


so there we go... pin2 is TXD, pin1 is RXD... thats what i needed ^^ a bit of it. ---> but wth are 3, 5, 6 and 7 for? 😕

Message was edited by: watts (3x total)

voidstar_apc
Janeway
Janeway
0 Likes
0
483

Re: 940-0272A as RS232

This was originally posted on APC forums on 10/19/2010


>
so there we go... pin2 is TXD, pin1 is RXD... thats what i needed ^^ a bit of it. ---> but wth are 3, 5, 6 and 7 for? 😕
>

Pin 2 is TXD and pin 1 is RXD on the UPS side. Pin 7 of the UPS appears to be to turn the UPS on and off. As for 3, 5, and 6, I can't tell you anything more than what's in the knowledge base article.

watts_apc
Crewman
Crewman
0 Likes
0
484

Re: 940-0272A as RS232

This was originally posted on APC forums on 10/19/2010


So it seems that there's no way excempt of tearing out whole housing of a chip and re-soldering straight from it.

If i find anything, i'll let you know 🙂

watts_apc
Crewman
Crewman
0 Likes
0
484

Re: 940-0272A as RS232

This was originally posted on APC forums on 10/19/2010


First: epic correction of 1st post: RS323, not 232, typo 😉

2nd: I've stripped cable and saw 3 wires. I'm gonna snap connector off and try multimeter for probing which pin is which, then i'd have idea what is what.
I'll solder on new connector and put it in housing... For mor infos about work-in-progress mail me (vatts[dot]linux[at]hotmail[dot]com)

watts_apc
Crewman
Crewman
0 Likes
0
484

Re: 940-0272A as RS232

This was originally posted on APC forums on 10/19/2010


First: epic correction of 1st post: RS323, not 232, typo 😉

2nd: I've stripped cable and saw 3 wires. I'm gonna snap connector off and try multimeter for probing which pin is which, then i'd have idea what is what.
I'll solder on new connector and put it in housing... For mor infos about work-in-progress mail me (vatts[dot]linux[at]hotmail[dot]com)

watts_apc
Crewman
Crewman
0 Likes
0
484

Re: 940-0272A as RS232

This was originally posted on APC forums on 10/20/2010


Found proper wiring, and thing just works 🙂 There was a lot of experimenting, but at least now i have Me-Powered USB2RS 323 (!!) cable 🙂

watts_apc
Crewman
Crewman
0 Likes
0
484

940-0272A as RS232

This was originally posted on APC forums on 10/17/2010


Hi!
i have cable USB-To-RS232 (940-0272A) at home, got it from friend, no UPS

I wonder if it has normal pinout or if pinout is different from normal RS-232 pinout?
i heard that APC's smart-signalling cables have data pins on 1 and 2?

Can anyone pop me up pinout pic so i can make pinout combo? I'd be really thankfull 🙂


Thanks, bye
watts