Board/DPR/DPR1097-DAT/DPR1097-DAT.md
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# DPR1097 RS-422
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-Latest Version pin Y Z B A GND
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+
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+Pin definition:
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+- GND
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+- A = R +
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+- B = R -
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+- Z = T-
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+- Y = T +
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+
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+
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![](20-27-15-15-02-2023.png)
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https://www.electrodragon.com/product/rs422-ttl-module-full-duplex-rs-422/
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+## Working Principle
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+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.
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## Ref
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https://w.electrodragon.com/w/RS-422
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-- [[RS422-dat]]
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+- [[RS422-dat]] - [[DPR1097]]
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Tech/Interface/RS422-dat.md
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![](19-25-15-08-08-2023.png)
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+Wiring
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+- Y = TXD+ --- B = RXD+
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+- Z = TXD- --- A = RXD-
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+- B = RXD+ --- Y = TXD+
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+- A = RXD- --- Z = TXD-
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+or
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+- A - Y
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+- B - Z
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+- Y - A
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+- Z - B
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+
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+Definitions
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+- Y = TXD+
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+- Z = TXD-
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+- A = RXD-
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+- B = RXD+
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+
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+
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+
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+
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+
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https://en.wikipedia.org/wiki/RS-422
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https://www.omega.com/en-us/resources/rs422-rs485-rs232
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+
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+
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+
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- [[DPR1097-dat]]
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