Pin | Signal | Function | Direction from the UPS |
number | name |
|
|
|
|
|
|
1 | Low batt | Low battery relay contact; 20 mA, 30 Vdc | Out |
|
| contact rating |
|
|
|
|
|
2 | TxD | Transmit to external device | Out |
|
|
|
|
3 | RxD | Receive from external device | In |
|
|
|
|
4 | DTR | PnP from external device (tied to Pin 6) | In |
|
|
|
|
5 | GND | Signal common (tied to chassis) | — |
|
|
|
|
6 | DSR | To external device (tied to Pin 4) | Out |
|
|
|
|
7 | — | No connection | — |
|
|
|
|
8 | AC fail | AC fail relay contact; 20 mA, 30 Vdc contact | Out |
|
| rating |
|
|
|
|
|
9 | — | No connection | — |
|
|
|
|
Specifications 39
