Multifunctional serial to Ethernet module user manual http://en.usr.cn
Jinan USR IOT Technology Co., Ltd tec@usr.cn
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3.8.4.
3.8.4.
3.8.4.
3.8.4. RS232
RS232
RS232
RS232 interface
interface
interface
interface
It have 2 * 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 .
Number
name
Description
2
RXD RS232 device receive data pin
3
TXD RS232 device transmit data pin
5
GND Signal ground
7
RTS RS232 require to send
8 CTS RS232 clear to send
Diagram 3 - 26 DB9 interface
3.8.5.
3.8.5.
3.8.5.
3.8.5. RS485
RS485
RS485
RS485 interface
interface
interface
interface
RS485 two wirings terminal, A
(DATA
+), B (DATA), when connected with RS485, A (+) to
A (+), B (-) to B (-).
3.8.6.
3.8.6.
3.8.6.
3.8.6.
RJ45
RJ45
RJ45
RJ45 interface
interface
interface
interface
Two network communication interface, accepting 1,2,3,6 and 4,5,7,8 standard in two
methods PSE.
3.9.
3.9.
3.9.
3.9. RJ45
RJ45
RJ45
RJ45 interface
interface
interface
interface
Internet access port connection, module network interface is 10 M / 100 M adaptive, support
AUTO MDI/MDIX, can discretionarily connect cross-over or direct network cable. That is to say,
you can use direct cable to connect with computer or test.
Pin Name Description
1 TX+ Transceiver Data+
2 TX- Transceiver Data-
3 RX+ Receive Data+
4 n/c Not connected
5 n/c Not connected
6 RX- Receive Data-
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