
Async EIA-422 DB-25 Pinout
DB
DB-25 Pinout, Asynchronous EIA-422
EIA-422 Boards with DB-25 cable conncectors
The wiring diagram for an EIA-422 DB-25 connector is shown in Table 1.
Table 1: EIA-422 DB-25 connector
DB-
25
Direction Signal
2 TxD+
14
TxD-
3
RxD+
16
RxD-
4
RTS+
19
RTS-
5
CTS+
13
CTS-
Shell
GND
* Arrows indicate which direction the signal is flowing
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