Siemens SIMATIC PANEL PC 877 - Page 200

Detailed descriptions
17.1 Motherboard
SIMATIC Panel PC 877
17-8 Operating instructions, Release 07/2006, A5E00877780-01
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 –