anyone here know what the symbols on a alarm PCB mean as i'm wiring up an alarm someone gave to me...but they didnt have the install manual :mac1:

pics attached of the pcb and one of the outside bell / strobe box

 

cheers

Well

 

I have had some experience and some of the connections look like they dependent on the type of alarm circuit you are using....

 

Alarm circuits can either permanently 'Switched on' and trigger when the circuit is broken. These devices are connected in Series. Others, connected in parallel can trigger when any of the devices closes the circuit. Most common devices in these categories are door contacts in Series and PIR/Microwave devices that are connected in parallel.

 

The bell box looks like it has connectors to be triggered either way, from a circuit closing or a circuit opening ie being broken and this is the safest way for the bell to protect it, so that if the wires are cut the circuit is cut and the bell or siren activates from the battery backup if the power has been cut

 

On the bell box the BT should be the battery, given there is only a +ve and a -ve

The St is the connection for a Strobe Light The H+ and H- I think are the connections for the trigger cuircuit going high or low as above

 

On the box I would think that the single block of two connectors is for mains power in but I wouldnt swear to it because there is no earth.

 

I would thing that the two +ve and -ve connectors are for the two different alarm circuits. 9 is an autodialler connection, 7 is the sounder and 5 is the engineer mode, possibly Tamper protection

 

Thats as much as I can tell apart from to say that series connected devices will have one -ve contact and one +ve contact, Parallel devices will have multiple wires in both the positive and -ve.

 

Hope this helps. If you can identify the board I or others may be able to add more information

cheers Tony...will have a bash tomorrow as you've given me some idea's on what goes where now...

the set is one door switch and 2 x PIR's all of them wireless types