Wiring
The following wiring should be correct for RS422 to RS422
| RS422 pin | RS422 alias | target alias | target |
|---|---|---|---|
| Y | TXD+ | RXD- | A |
| A | RXD- | TXD+ | Y |
| Z | TXD- | RXD+ | B |
| B | RXD+ | TXD- | Z |
this probably wrong or not P2P type
- Y = TXD+ — B = RXD+
- Z = TXD- — A = RXD-
- B = RXD+ — Y = TXD+
- A = RXD- — Z = TXD-
| RS422 pin | RS422 alias | target alias | target |
|---|---|---|---|
| Y | TXD+ | RXD+ | B |
| Z | TXD- | RXD- | A |
| B | RXD+ | TXD+ | Y |
| A | RXD- | TXD- | Z |
Use with arduino
Demo video
- please refer to ESP32-ISO board
ref
https://en.wikipedia.org/wiki/RS-422 https://www.omega.com/en-us/resources/rs422-rs485-rs232