Table 9. RS-232 Communication Port Pin Assignment
Pin | Signal Name | Function | Direction from the UPS |
|
|
|
|
1 |
| Unused | — |
|
|
|
|
2 | Tx | Transmit to external device | Out |
|
|
|
|
3 | Rx | Receive from external device | In |
|
|
|
|
4 |
| Unused | — |
|
|
|
|
5 | GND | Signal common (tied to chassis) | — |
|
|
|
|
6 |
| Unused | — |
|
|
|
|
7 |
| Unused | — |
|
|
|
|
8 |
| Unused | — |
|
|
|
|
9 |
| Unused | — |
|
|
|
|
NOTE: Unused pins must be left free on all models.
Additional UPS Features | 55 |
