USR IOT USR-N540 User Manual

USR-N540 User Manual www.usriot.com
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2.6. DB9 Pin Definition
 For RS232 port, pin definition is as below
 For RS485 port, pin 3 works as “B(-)”, Pin 7 works as “A+”
 For RS422 port
2.7. DB9 Pin-board
We provide DB9 pin-board for user to use terminal connection.
Pin
Definition
2
RXD, pin of receives data
3
TXD
5
GND
7
RTS
8
CTS
Pin
Definition
2
RX+, pin of receives data
3
TX-
5
GND
7
TX+
8
RX-

USR IOT USR-N540 Specifications

General

Brand	USR IOT
Model	USR-N540
Category	Server
Language	English