B-3
OP27, OP37 Equipment Manual
Release 05/99
Pin assignment of the 25–pin Sub–D socket:
Pin
TTL (Centronics)
1
– Strobe
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
– Acknowledge
11
+ Busy
12
+ Paper End
13
+ Select
14
– Auto Feed
15
– Error
16
– Init Printer
17
– Select Input
18...25
Ground (0 V)
LPT (TP37)
only
Interface Assignments
13
1
25
14
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