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MODULAR SMART SWITCH
Table B-1. DB25 Parallel Connector Pinouts.
Pin Name Input from Computer Output to Printer
1 STROBE INPUT OUTPUT
2-9 DATA 0 to 7 INPUT OUTPUT
10 ACKNOWLEDGE OUTPUT no connection
11 BUSY OUTPUT INPUT
12 PAPER END OUTPUT low no connection
13 SELECT OUTPUT high no connection
14 AUTOFEED XT no connection no connection
15 ERROR OUTPUT high no connection
16 INIT no connection OUTPUT high
17 SELECT IN no connection OUTPUT low
18-25 SIGNAL GROUND ground ground
The cables need to have a DB25 connector for connecting to the Modular
Smart Switch. If possible, the length should be kept below 22.9 ft. (7 m) to
reduce interference.
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MODULAR SMART SWITCH
Appendix B: Parallel Ports
B.1 Parallel Pin Assignments
Each parallel port uses a DB25 socket connector, similar to the one on an
IBM PC, PC/XT, or AT. Figure B-1 shows the pin numbers as viewed from
the rear of the Modular Smart Switch.
Figure B-1. DB25 Parallel Connector.
