User’s Manual
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 |
|
|
|
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 |
|
|
|
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SPECO TECHNOLOGIES 07/10 |
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