# Multi-IO多功能接口 

| 引脚  | 功能     | 引脚  | 功能 |
| ----- | -------- | ----- | ---------- |
| Pin1  | RS485A   | Pin2  | 隔离DO/460 |
| Pin3  | RS485B   | Pin4  | 隔离DO/459 |
| Pin5  | GND      | Pin6  | 隔离GND    |
| Pin7  | RS232_TX | Pin8  | 隔离DI/465 |
| Pin9  | RS232_RX | Pin10 | 隔离DI/458 |
| Pin11 | GND      | Pin12 | GND        |
| Pin13 | NX_CAN_L | Pin14 | SPI_CAN_L  |
| Pin15 | NX_CAN_H | Pin16 | SPI_CAN_H  |
| Pin17 | GPIO12   | Pin18 | GND        |
| Pin19 | GPIO13   | Pin20 | 5V/非隔离  |

![](../img/multi.io.png)