When used on VScom serial ports in RS422 or RS485 operation, the balanced signals are located on twisted pairs in a Cat5 cable.
DSub-9 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
RJ45 | 8 | 7 | 3 | 6 | 5 | 4 | 2 | 1 | |
RS232 | DCD | RxD | TxD | DTR | GND | DSR | RTS | CTS | RI |
RS422 | Tx- | Tx+ | Rx+ | Rx- | GND |
RS485 | Data- | Data+ |
This allows for easy noise cancelling and shielding.