On 08/01/13 01:05, Morrie Wyatt wrote:
On 06/01/13 16:43, Brian May wrote:
Hello,
I have a Powerware PowerRite XT (PRXT0600A), which I am attempting to configure with nut over RS232, to allow for clean shut downs.
However, so far I haven't had any luck trying to talk to it, or work out what language it speaks even. Its like it I forgot to plug it in in fact, I am not getting any response to anything.
Is there any hope? Or should I be looking at getting a newer UPS that I know will work with nut?
Hi Brian.
A quick search found the following URL which has circuit diagrams for the UPS.
http://www.eserviceinfo.com/downloadsm/42370/Powerware_PRXT0600A.html
The last GIF file in the archive shows the RS232C output configuration.
The RS232C output is actually an optocoupler output so the following pins are used:
1 (CD) Shutdown 3 (TxD) Power Fail 4 (DTR) Power to optocouplers 5 (GND) Low Battery 6 (DSR) Battery Status OK 8 (CTS) On Battery
It's a bit of a guess on pins 6 and 8 based on my take of the circuit logic, and I can't quite understand how the CD (pin 1) is being used for the shutdown logic, so pin 1 may be routed to a different pin at the PC end.
Looking further at the circuit, I suspect that when the UPS sets the Low Battery state, it pulls the DTR line to ground, and probably uses this to remove current from the Shutdown optocoupler LED which triggers the UPS to shutdown. This too is a guess, as I can't understand why else you would connect an optocoupler between ground and DTR.
Regardless you should be able to map the pin functions according to needs using the genericups UPS type as per the manual.
As it is a signals only configuration, there is no battery monitoring beyond true/false options.
Hope that helps.
Regards, Morrie.
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