Usr USR-TCP232- E - Page 28

Multifunctional serial to Ethernet module user manual http://en.usr.cn
Jinan USR IOT Technology Co., Ltd tec@usr.cn
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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
9 VCC Default not used. there is one pad jumper, default
disconnect, when connect, it can power supply outside
serial device.
Diagram 3 - 18 DB9 interface
Note: none
3.5.5.
3.5.5.
3.5.5.
3.5.5. RS485
RS485
RS485
RS485 /RS422
/RS422
/RS422
/RS422 interface
interface
interface
interface
RS485 two wirings terminal, A (DATA +), B (DATA), when connected with RS485, A (+) to
A (+), B (-) to B (-).
RS422 interface also connected to RS232 nine needles binding post. The device have RS232
and RS485 interface, but can only use one in a time, autoadaptation, connect as RS485 is RS485
function, connect as RS422 wiring is RS422 function.