Siemens Simatic PC Panel PC 870, Equipment Manual

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Hardware Information Release 11/02
7-10
SIMATIC Panel PC 870 Computing Unit, Equipment Manual
Parallel port LPT1
The parallel port on the computer unit is assigned as follows:
Connector Pin No. Short
Name Meaning Input / Output
1 / Strobe (CLK) Data message Output
(Open Collector)
2 Data bit 0 Data line 0
3 Data bit 1 Data line 1
4 Data bit 2 Data line 2
5 Data bit 3 Data line 3
Output
1
1
6 Data bit 4 Data line 4
Output
(TTL level)
4
7 Data bit 5 Data line 5
8 Data bit 6 Data line 6
9 Data bit 7 Data line 7
10 / ACK
(Acknowledge) Data
acknowledgement
11 BUSY Not ready for
receiving data
Input
W
12 PE (PAPER END) End of paper
(4.7 k
W
pull up)
13 SELECT Device selection
1
2
5
14 / AUTO FEED automatically a
new line Output
(Open Collector)
3
5
15 / ERROR Device error Input
(4.7 k
W
pull up)
16 / INIT Reset / initialize
Output
17 / SELECT IN Printer selection
Output
(Open Collector)
18 - 25 GND Ground –
PS/2 mouse port, X22
You can connect an external PS/2 mouse to your computer unit. The port is
assigned as follows:
View at the Female
Connector
Pin
No.
Short
Name
Designation Input /
Output
1
DAT
Mouse data line Input / output
2 NC Not Connected -
5
6
3 GND Ground -
3
4
4 P5VFK + 5 V fused Output
5 CLK Mouse clock line Input / output
1 2
6
NC
Not Connected -