Connectors
M12 sockets X01 and X03
Pin | Core color | RS422 | RS485 | ||
|---|---|---|---|---|---|
Signal | Description | Signal | Description | ||
1 | brown | Tx - | send data | - / A | Inverted data line |
2 | white | Tx + | send data | + / B | Non-inverted data line |
3 | blue | Rx - | receive data | do not connect | |
4 | black | Rx + | receive data | do not connect | |
5 | grey | Shield | Shield | Shield | Shield |
 | RS485 bus structure - use termination resistors A linear bus with more than two devices can be set-up in RS485 mode. To prevent reflections during the data transmission, it is necessary to terminate the line ends of the bus cable with resistors (120 Ω). |
| The signal designations "A" and "B" are not clear With some devices the designations of the data lines "A" and "B" are swapped. |