Quatech Bluetooth To Serial Converter SS-BLT-400 Manuel d'utilisateur télécharger pdf (Page 18)

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RS-422/485 Pin Assignment

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

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

RS-485 : PIN 1 : D+ PIN2 : D-

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RS-422 Wiring Diagram

Serial Device

Bluetooth To Serial Converter

T+ 3 R+

T- 4 R-

R+ 1 T+

R- 2 T-

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RS-485 Wiring Diagram

Serial Device Bluetooth To Serial Converter

D+ 1 D+

D- 2 D-

1 2 3 4

1 2 ... 13 14 15 16 17 18

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