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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