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 |