Siemens PANEL PC 877 Manuel D’Utilisation
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
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