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Appendix A: Printer and Cable Specifications
❖
A-11
The interface signals and their associated pin assignments
are identified in the Figure A.5.
Figure A.5 Pin assignment for RS-422A
Signal Name
Pin #
RS-422A
Function
Direction
Chassis GND 1 GND - - - - - -
Transmitted Data 2 - - - - - - - - - - - -
Received Data 3 - - - - - - - - - - - -
Request to Send 4 - - - - - - - - - - - -
Clear to Send 5 - - - - - - - - - - - -
Data Set Ready 6 - - - - - - - - - - - -
Signal GND 7 GND - - - - - -
Carrier Detect 8 - - - - - - - - - - - -
N/C 9, 10, 12 - - - - - - - - - - - -
Send Data Noninverted 11 Data From Printer
Receive Data Noninverted 13 Data To Printer
Send Data inverted 14 Data From Printer
N/C 15, 17 – 19 - - - - - - - - - - - -
Receive Data Inverted 16 Data To Printer
Data Terminal Ready 20 - - - - - - - - - - - -
N/C 21 – 25 - - - - - - - - - - - -
WUG-APPA Page 11 Black,Cyan Sunday, January 22, 1995 8:55 PM