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Installation, Configuration and Operation of Hardware > Installation and Configuration of Control Devices > Installing the SR2 Receiver > SR2 Advanced Hardware Configuration >> Alarm Relays
The SR2 has three on-board relay outputs which can be used to send alarm notification to a beacon or via an auto-dialler (or other 3rd party device).
•These are connected via JP2, as follows:
Pin |
Connection |
|
1 |
Relay 1 N/O |
This relay closes and a nominal 12V appears on Pin 1 in the event of any alarm on the any of the assigned Grids. It is fused via F1. This is suitable for driving alarm beacons. |
2 |
Relay 1 GND |
|
3 |
Relay 2 common |
This is a changeover relay responding to alarms in the software. When no alarms exist, pins 3+5 are connected. When an alarm exists, pins 3+4 are connected. |
4 |
Relay 2 NC |
|
5 |
Relay 2 NO |
|
6 |
Relay 2 common |
This is a changeover relay indicating the mains power state of the SR2. When power is present pins 6+8 are connected. When power fails pins 6+7 are connected. |
7 |
Relay 2 NC |
|
8 |
Relay 2 NO |