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Speco Technologies 4TH User Manual

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Page of 175
 
User’s Manual
 
 
DVR-4TH/8TH/16TH Series 
SPECO TECHNOLOGIES 07/10
 
161
Appendix F: Alarm I/O Pin Definition 
The tables below list the pin definitions of alarm I/O located on the rear panel of the 
DVR-4TH/ 8TH/ 16TH    series unit.   
 
DVR-4TH Alarm I/O 
 
 
Pin  Definition 
Pin  Definition 
Pin Definition 
1 
RS485 D+ 
8 
Normal Close B 
15  Reserved 
2 
RS485 D- 
9 
Common Node B 
16  Reserved 
3 
Ground 
10  Normal Open B 
17  Reserved 
4 
Normal Close A 
11  Alarm In 1 
18  Reserved 
5 
Common Node A 
12  Alarm In 2 
19  Reserved 
6 
Normal Open A 
13  Alarm In 3 
20  Reserved 
7 
Ground  
14  Alarm In 4 
 
 
 
DVR-8TH Alarm I/O 
 
 
Pin  Definition 
Pin  Definition 
Pin Definition 
1 
RS485 D+ 
8 
Normal Close B 
15  Alarm In 5 
2 
RS485 D- 
9 
Common Node B 
16  Alarm In 6 
3 
Ground 
10  Normal Open B 
17  Alarm In 7 
4 
Normal Close A 
11  Alarm In 1 
18  Alarm In 8 
5 
Common Node A 
12  Alarm In 2 
19  Reserved 
6 
Normal Open A 
13  Alarm In 3 
20  Reserved 
7 
Ground  
14  Alarm In 4