Digi TransPort WR11 - Transport WR21 Serial Pinout

Hardware features TransPort WR21 hardware features
Digi TransPort® Routers User Guide
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TransPort WR21 serial pinout
Note that all TransPort serial ports are DCE.
RS232 pinout
Pin # Direction RS232 DCE Description
1 Out DCD Data Carrier Detect
2 Out RXD Receive Data
3 In TXD Transmit Data
4 In DTR Data Terminal Ready
5 N/A GND Ground
6 Out DSR Data Set Ready
7 In RTS Ready To Send
8 Out CTS Clear To Send
9 Out RI Ring Indicate
RS422/RS485 pinout
Pin # Direction RS422/ RS485 Description
1 Out CTS- Clear To Send -
2 Out RD+ Receive Data +
3 In TD+ Transmit Data+
4 In RTS B RTS- Ready To Send -
5 N/A GND Ground