connector wiring scheme
9 pin D-SUB female connector
at the UPS
| Pin | Description |
|---|---|
| 1 | Common/Negative |
| 2 | External inverter shutdown, positive side |
| 3 | line fail, normaly open contact |
| 4 | return/external inverter shutdown negative side |
| 5 | line fail, normaly closed contact |
| 6 | low battery, positive side (2 minute warning) |