[Nut-upsuser] Re: old Powercom UPS

Charles Lepple clepple at gmail.com
Tue May 2 01:28:29 UTC 2006

On 5/1/06, Criggie <criggie at criggie.dyndns.org> wrote:
> Its a rather old PCM Powercom UPS-1200-A   I have tried the serial cables
> from a fenton UPS (green ones) and a black APC 940-0024C cable without
> success.  Since the statserial output doesn't change, it must be some
> format of smart signal?

Possibly, or maybe it is an even weirder cable than those. Note that
for contact closure UPSes, output lines from the PC could be required
to see proper input signal transitions.

> Where do I go from here, short of outright replacement?

If you can afford the downtime, you could poke around inside and trace
the lines from the serial connector back to the circuitry.

All merely suggestions, of course - don't blame me if you get zapped :-)

- Charles Lepple

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