Siemens SIMATIC Panel PC 870 Equipment Manual page 104

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