Multifunctional serial to Ethernet module user manual
www.tcp232.net
Jinan USR IOT Technology Co., Ltd
Page3
////
9
Power supply socket, the terminal and pin 9 of the com, mutual unicom, can choose one power
supply in, and another power supply out, better adapt to the use environment.
2.2 Indicator light
Equipment have 4 indicator lights in total, sequence from left to right
ID
Name
Description
1
Power(red)
Bright after power on
2
Work(green)
Flash at work
3
Link(green)
In RJ45 port, bright after network connection
4
Data(yellow)
In RJ45 port, flash if there are datas on network
2.3 RS232 interface
The serial port is male (needl), RS232 level (can be directly connected to computer serial),
part of RS232 pin sequences consistent to computer COM port. When connected with the
computer, we need to use cross cable (2-3 cross, 7-8 cross, 5-5 direct, 7-8 can don’t connect,
but musn’t direcly connect to computer. Otherwise, it might lead to irregularly work).
The DB9 interface contains the RS232, RS485 and RS422 interfaces.
Number
RS232
RS485
RS422
Description
1
-
B(-)
TX-
RS485 minus or RS422 transmit
minus
2
RXD
-
-
RS232 device receive data pin
3
TXD
-
-
RS232 device transmit data pin
4
-
-
RX-
RS422 receive minus
5
GND
GND
GND
Signal ground
6
-
A(+)
TX+
RS485 plus or RS422 transmit plus
7
RTS
-
-
RS232 require to send
8
CTS
-
-
RS232 clear to send
9
-
-
RX+
RS422 receive plus
Note: RS485 and RS422 are self adaption ports, according to RS485 connection that is RS485,
according to RS422 connection is RS422
2.4 RS485 interface
RS485 two wirings terminal, A (DATA +), B (DATA), when connected with RS485, A (+) to A
(+), B (-) to B (-).
2.5 RS422 interface
