3Com CS/2500 manual Do-S

Parallel Printer Port A-5

Table A-2 Transceiver Connector Pin Assignments (continued)

Pin	Function	Circuit	Use
11*	Transmit Shield	DO-S	Data Out circuit shield
12	Receive (-)	DI-B	Data In circuit B
13†	Power	VP	Voltage plus
14*	Power Shield	VS	Voltage shield
15	Control Out (-) (unsupported)	CO-B	Control Out circuit B
Shell	Chassis Ground	PG	Protective ground;
			conductive shell

* Attached to power return.

† Current should not exceed 500 mA.

Parallel Printer Port CS/2500 and CS/2600 servers include a printer port (labeled “Parallel Printer”) for connecting the server to Centronics-type parallel printers. Figure A-5 shows pin numbers for this port. Table A-3 lists pin assignments. The table shows pin assignments for both the server interface and the printer connector interface.

1 2 3 4 5 6 7 8 9 10 11 12 13

• • • • • • • • • • • • •

• • • • • • • • • • • •

14 15 16 17 18 19 20 21 22 23 24 25

Figure A-5 Printer Port Pin Numbers

Table A-3 Printer Port Pin Assignments

Pin (Server	Pin (Printer
Interface)	Interface)	Signal	Source	Description
1	1	Strobe	Server	—
2	2	Data1	Server	Data Bit 0
3	3	Data2	Server	Data Bit 1
4	4	Data3	Server	Data Bit 2
5	5	Data4	Server	Data Bit 3
6	6	Data5	Server	Data Bit 4
7	7	Data6	Server	Data Bit 5

(continued)