Rs-422/485 Pin Assignment; Rs-422 Wiring Diagram; Rs-485 Wiring Diagram - Quatech Bluetooth To Serial Converter SS-BLT-400 Operation Manual

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□ RS-422/485 Pin Assignment

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The pin assignment scheme for a 4-pin RS-422 is given below.
RS-422 : PIN 1 : T+
RS-485 : PIN 1 : D+
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□ RS-422 Wiring Diagram

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Serial Device
T+
T-
R+
R-
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□ RS-485 Wiring Diagram

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Serial Device
D+
D-
1 2 3 4
PIN 2 : T-
PIN2 : D-
17
PIN 3 : R+
Bluetooth To Serial Converter
3 R+
4 R-
1 T+
2 T-
Bluetooth To Serial Converter
1 D+
2 D-
PIN 4 : R-