APC Dumb UPS cable (simple) Cable Pinout -
| UPS Signal Name | DB-9 Male (UPS end) | DB-9 Female (PC end) | PC Signal Name |
|---|---|---|---|
| Shutdown | 1 | 4 | DTR |
| AC Fail | 2 | 8 | CTS |
| Common | 4,9 | 5 | GND |
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