Siemens PANEL PC 877 operating instructions LPT1 parallel interface

Detailed descriptions 17.1 Motherboard

LPT1 parallel interface, X134

The parallel interface (LPT 1) has the following pinout:

Parallel interface LPT1

PinNo.	Abbreviation	Meaning	Input/Output
1	/ Strobe (CLK)	Data message	Output (open collector)
2	Data - Bit 0	Data channel 0	Output (TTL level)
3	Data - Bit 1	Data channel 1	Output (TTL level)
4	Data - Bit 2	Data channel 2	Output (TTL level)
5	Data - Bit 3	Data channel 3	Output (TTL level)
6	Data - Bit 4	Data channel 4	Output (TTL level)
7	Data - Bit 5	Data channel 5	Output (TTL level)
8	Data - Bit 6	Data channel 6	Output (TTL level)
9	Data - Bit 7	Data channel 7	Output (TTL level)
10	/ACK	Data acknowledge	Input (4.7 kO pull-up)
11	BUSY	Not ready	Input (4.7 kO pull-up)
12	PE (PAPER END)	Paper end	Input (4.7 kO pull-up)
13	SELECT	Device selection	Input (4.7 kO pull-up)
14	/ AUTO FEED	Automatically new line	Output (open collector)
15	/ ERROR	Device error	Input (4.7 kO pull-up)
16	/ INIT	Reset / Initialization	Output (open collector)
17	/ SELECT IN	Printer selection	Output (open collector)
18 – 25	GND	Ground	–

17-8	SIMATIC Panel PC 877
	Operating instructions, Release 07/2006, A5E00877780-01