Chapter 8. Pin Assignments                                  [Back to Index] RS-232 pins description: PIN 1: vacant          PIN 2: RXD          PIN 3: TXD      PIN 4: vacant PIN 5: GND            PIN 6: vacant        PIN 7: RTS PIN 8: CTS PIN 9: vacant RS-232 Wiring Diagram Serial Port   e-COV132/432 2    RX   3     TX 3    TX   2     RX 5    GND      5     GND 7    RTS 8     CTS 8    CTS 7     RTS e-COV100 9 VCC 9     VCC RS-422 pin properties: PIN 1: R-   PIN 2: R+     PIN 3 : T-      PIN 4 : T+ RS-422 Wiring Diagram Serial COM Port                                      e-COV132 R-    3     T- R+   4     T+ T-    1     R- T+   2     R+ RS-485 Wiring Diagram Serial COM Port                                      e-COV132 R- T-     1     R-   3     T- R+ T+   2     R+  4     T+ 22

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