Hardware features TransPort WR21 hardware features
Digi TransPort® Routers User Guide
39
Pin # Direction RS422/ RS485 Description
6 Out RD- Receive Data -
7 In RTS+ Ready To Send +
8 Out CTS+ Clear To Send +
9 In TD- Transmit -
Notes
n For true RS485 mode (2-wire half-duplex mode), the TD+ and RD+ pair and TD- and RD- pair
should be connected together.
n The CTS and RTS signals are optional and not normally needed for RS485.
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