Mapping Options for the RS422 Mode

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There are even fewer options in the RS422 mode:

 

Mapping option

Available signals

Pin pairs on the DB9M connector

Missing

lines

#6,2

#3,4

#8,9

#7,1

Option 0

RX/TX/CTS/RTS/DSR/DTR

RX

TX

CTS

RTS

dsr, dtr

Option 5

RX/TX/DSR/DTR + RX/TX + RX/tx

RX

TX

RX2

TX2

dsr, dtr, rx4, tx4

Option 14

RX/TX/DSR/DTR + RX/tx/DSR/DTR

RX

TX

DSR4

DTR4

dsr, dtr, rx4, tx4