connector or cable wiring APC Part# 940-0095B. Should work with APC PowerChute Pro software.
9 pin D-SUB male connector to
the UPS
9 pin D-SUB female
connector to the computer
| UPS Signal Name | DB-9 Male (UPS end) | DB-9 Female (PC end) | PC Signal Name |
|---|---|---|---|
| RX / Shutdown | 1 | via R=4k to 3 | TxD, also connected via R=4kOhm to pin 1 (DCD) |
| TX / AC Fail | 2 | 2,9 | RxD, RI |
| Common | 4,9 | 5 | GND |
At the PC end pins 4,6,8 (DTR, CTS, DSR) shorted.
1-----------------^^^---\-----------3
R \-----^^^--1
R
2-----------------------------------2 and 9 (shorted)
4----\
|---------------------------- 5
9----/
4 and 8 and 6 (shorted)
R=4KOhm.
Another variant:
Signal Computer UPS
DB9F DB9M
DTR 4 ----*
CTS 8 ----|
DSR 6 ----|
DCD 1 ----*
GND 5 ---------------*---- 4 Ground
|
*---- 9 Common
RI 9 ----*
|
RxD 2 ----*--------------- 2 On Battery
TxD 3 ----------[####]---- 1 Kill UPS Power
4.7K ohm