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Definition of Pins

Pin Description

Pin Name Direction Description
1 and 2 Us 3.3V O Us 3.3V output pin, used for communication power supply of post-stage I/O devices
3, 4, 9, and 10 Us GND O Us GND output pin, used for communication power supply of post-stage I/O devices
5 Rx0+ I Prestage module is received by Ethernet +
6 Tx1+ O Post-stage module is transmitted by Ethernet +
7 Rx0- I Prestage module is received by Ethernet-
8 Tx1- O Post-stage module is transmitted by Ethernet -
11 Tx0+ O Prestage module is transmitted by Ethernet +
12 Rx1+ I Post-stage module is received by Ethernet +
13 Tx0- O Prestage module is transmitted by Ethernet -
14 Rx1- I Post-stage module is received by Ethernet -
15 SWDIO MCU data cable
16 SWCLK MCU clock line
17, 18, 23, and 24 RTD 1~4+ I RTD 1~4+ Input
19, 20, 25, and 26 RTD 1~4- I RTD 1~4- Input
21, 22, 27, and 28 RTDL 1~4- I RTDL 1~4- Input
29~32 NC Not connect
33~35 PGND I Field-side power supply 0V
36~38 Up 24V I Field-side power supply 24V
39 and 40 PE Earth
Last modified: 2025-06-30