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Appendix A: Printer and Cable Specifications
❖
A-9
The interface signals and their associated pin assignments
are identified in the Figure A.4.
Figure A.4 Pin assignment for RS-232C
Signal Name
Pin #
RS-232C
Function
Direction
Chassis GND 1 GND - - - - - -
Transmitted Data 2 Data From Printer
Received Data 3 Data To Printer
Request to Send 4 Control From Printer
Clear to Send 5 Control To Printer
Data Set Ready 6 Control To Printer
Signal GND 7 GND - - - - - -
Carrier Detect 8 Control To Printer
N/C 9, 10, 12 - - - - - - - - - - - -
Send Data Noninverted 11 - - - - - - - - - - - -
Receive Data Noninverted 13 - - - - - - - - - - - -
Send Data inverted 14 - - - - - - - - - - - -
N/C 15, 17 – 19 - - - - - - - - - - - -
Receive Data Inverted 16 - - - - - - - - - - - -
Data Terminal Ready 20 Control From Printer
N/C 21 – 25 - - - - - - - - - - - -
WUG-APPA Page 9 Black,Cyan Sunday, January 22, 1995 8:55 PM