940-0272A as RS232

[Anonymous user]

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

[BillP]

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]

>
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].

[Anonymous user]

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]

>
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.

[Anonymous user]

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 🙂

[Anonymous user]

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)

[Anonymous user]

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)

[Anonymous user]

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

[Anonymous user · Accepted solution]

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