Sur-Gard System I - Parallel Printer Port

APPENDIX B - PORTS
95
SG-System I Operating Manual
B
Parallel Printer Port
The parallel printer port sends events to the local printer (DB25 Female).
Note: Maximum cable length is 1.8m (6ft). Longer cables may impair performance.
Figure 9: Parallel Printer Port
Table 38: Parallel Printer Port Pinouts
Pin no (DB25) Signal name Direction Register - bit Inverted
1 nStrobe Out Control-0 Yes
2 Data0 In / Out Data-0 No
3 Data1 In / Out Data-1 No
4 Data2 In / Out Data-2 No
5 Data3 In / Out Data-3 No
6 Data4 In / Out Data-4 No
7 Data5 In / Out Data-5 No
8 Data6 In / Out Data-6 No
9 Data7 In / Out Data-7 No
10 nAck In Status-6 No
11 Busy In Status-7 Yes
12 Paper-out In Status-5 No
13 Select In Status-4 No
14 Linefeed Out Control-1 Yes
15 nHour In Status-3 No
16 nInitialize Out Control-2 No
17 nSelect-Printer Out Control-3 Yes