Quatech SS-BLT-400 operation manual

□RS-422/485 Pin Assignment

The pin assignment scheme for a 4-pin RS-422 is given below.

1 2 3 4

RS-422 : PIN 1 : T+	PIN 2 : T-	PIN 3 : R+	PIN 4 : R-
RS-485 : PIN 1 : D+	PIN2 : D-

□RS-422 Wiring Diagram

Serial Device	Bluetooth To Serial Converter
T+	3	R+
T-	4	R-
R+	1	T+
R-	2	T-

□RS-485 Wiring Diagram

Serial Device		Bluetooth To Serial Converter
	D+	1	D+
	D-	2	D-

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