connector or cable wiring Part# M2501. Should work with RUPS for DOS/Windows 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 |
|---|---|---|---|
| AC Fail | 2 | 8 | CTS, connected by R 1k8 to pin 7(RTS) |
| Batt Low | 5 | 1 | DCD, connected by R 1k8 to pin 8 (CTS). Connected by R 1k8 to pin 7(RTS) |
| Shutdown | 6 | R=10k, 4 | DTR |
| Common | 4,7 | 3 | TxD |