DPR1097 RS-422

Pin definition:

• GND
• A = R +
• B = R -
• Z = T-
• Y = T +

https://www.electrodragon.com/product/rs422-ttl-module-full-duplex-rs-422/

Working Principle

To run a loop test, connect A->Y, B->Z. Connect USB-TTL bridge for example PL2303TA, TXD to RXD, RXD to TXD, 5V-5V, GND-GND.

Ref

Legacy Wiki

• https://w.electrodragon.com/w/Category:Interface

• https://w.electrodragon.com/w/RS-422

• RS422-dat - DPR1097