Old UPSs - test-drb@ccmp.vtda.org

30 Mar 2007

At 03:53 PM 3/28/2007 -0500, you wrote:
...
 I'm trying to get two old UPS units to work. They
were made by Best 
Electric / Best Power Technologies and apparently, that firm (in Necedah 
WI) has changed hands at least twice. Entering www.bestpower.com into a 
browser gets you an immediate redirect to 
http://www.powerware.com/UPS/BestPower/Products.asp, an Eaton company, 
which knows nothing at all about these units.

I've got a model ME2.1KVA unit that needs four 12V, 35Ah batteries. I 
think it works, I just can't afford the batteries. Best price I've seen is 
about $49. The UPS is huge-- about 18 inches front to back, and darn near 
two feet high.

I also have a ME700VA unit that uses the same battery, just one of them.

Both have serial ports and lots of dipswitches.

Anyone know where to find a manual for these? 
Well I'll be dipped. The direct approach paid off! I sent an email to Eaton 
via their "Contact Us" form on their website, which I reached by trying to 
reach www.bestpower.com, being redirected to 
http://www.powerware.com/UPS/BestPower/Products.asp?CC=1 (Service and 
support --> Contact Support) and finding the BestService at eaton.com email 
address. Or maybe it went to http://www.powerware.com/USA/contact It's hard 
to tell.

Anyhow, someone at BestService at eaton.com sent me a 27-page PDF with most of 
the user-side documentation. It includes a pin-out of the DB-25 connector 
on the back, and the command guide.

Pin
1  n/c
2  transmit data
3  receive data
6  +12v level
7  signal ground
11 contact opens on inverter running
12 contact closes on inverter running
13 contact on inverter running common
14 +12v, -.5 amp
18 +12v level
19 n/c
20 AS/400 option
21 remote emergency power off- short to pin 6 or 18 to shut ups down (off 
state)
22 n/c
23 contact closes on alarm
24 contact on alarm common
25 contact opens on alarm

-T

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