40
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RS-422 Pin Assignment
The pin assignment scheme for a 4-pin RS-422 is given below.
PIN 1 : T+ PIN 2 : T- PIN 3 : R+ PIN 4 : R-
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RS-485 Pin Assignment
The pin assignment scheme for a 4-pin RS-485 is given below.
PIN 1 : X PIN 2 : X PIN 3 : D+ PIN 4 : D-
1 2 3 4