Chengdu Ebyte Electronic Technology Co., Ltd.
NE2-S1/NE2-S1-TB User Manual
Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.
11
3.3Mechanical Dimensions
3.4Pin definition
Serial
number Pin function
Description
1
R X_P
Ethernet receives RX+ signal ;
2
R X_N
Ethernet receives RX-signal ;
3
T X_P
Ethernet sends TX+ signal ;
4
T X_N
Ethernet sends TX-signal ;
5
NC
Default is left floating ;
6
NC
Default is left floating;
7
T XD
When sending data through the serial port, the T TL level
communication voltage only supports 3.3V . If it is
connected to 5 V , level conversion is required;
8
NC
Default is left floating;
9
NC
Default is left floating;
10
R XD
The serial port receives data and only supports T TL level
communication voltage;
3.3V , if connected to 5 V , level conversion is required;
11
485_EN
The serial port works in full-duplex mode by default. If
an external 485 chip is connected, the pin is connected to
a 1k pull-down resistor. The pin function becomes the
RS485 enable control pin. When the serial port sends
