Black Box SW925AE, SW928C, SW929C, SW927C manual Appendix B Parallel Ports, Parallel Pin Assignments

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-1shows the pin numbers as viewed from the rear of the Modular Smart Switch.

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2514

Figure B-1. DB25 Parallel Connector.

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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