Serial Ports (Acuity® Panels)
The serial ports on the back of the control panel support the RS-232 (TIA/EIA-232) and RS-422 (TIA/EIA-422) transmission standards.
The serial ports use a female DB9 connector.
| Pin | RS-232 | RS-422 |
|---|---|---|
| 1 | n/c | n/c |
| 2 | Tx | Rx- |
| 3 | Rx | Tx+ |
| 4 | Ground | Ground |
| 5 | Ground | Ground |
| 6 | n/c | n/c |
| 7 | n/c | Rx+ |
| 8 | n/c | Tx- |
| 9 | n/c | 5V 1K Pull-up |