EOL wiring

[Guest sparkyboy]

Hi All

Can someone explain to a stupid person (me) EOL wiring, when I used to install the od panel many moons ago you just had two power, two tamper and two alarm wires to the PIR, I'm just a bit confused about all this resistor stuff.

Regards

Mark

[Guest CHRISATBSS]

EOL THE RESISTOR NEEDS TO GO IN SERIES WITH THE ZONE SO THE PANEL SENSES THE VALUE OFF THE RESISTOR WHEN THE DETECTOR IS CLOSED. RESISTOR NEEDS TO GO IN THE LAST DEVICE IF YOU HAVE MORE THAN ONE DETECOTOR OR CONTACT ON A ZONE AND AT THE DEVICE AND NOT IN THE PANEL

OR DID YOU MEAN FSL THAT IS WHEN YOU HAVE 2 RESISTORS FOR ONE DEVICE

CHRIS

[norman]

Here you go

[Guest sparkyboy]

What if you have two PIRs on the same zone, would you just have the reistors on the last PIR,

Thanks

Mark

[Nova-Security]

Your not supposed to unless they have a latch indicator

[Guest CHRISATBSS]

What if you have two PIRs on the same zone, would you just have the reistors on the last PIR,

Thanks

Mark

depends what panel you are working on for example galaxy you can put a resitor in all PIR'S/DT that go to one zone but only on the alarm relay.and in the last device you put one resistor on the alarm relay and 1 from one side off the alarm relay you put the other resistor to one side off the tamper THIS IS (FSL) FULLY SUPPERVISED LOOP 2 RESISTORS

another example is scantronic where you CAN'T put resistors in all devices when more than one device is on one zone you have to put all the detectors on that zone in series and where you join them you put the resitors

not recomended each device should have its own zone

chris

[norman]

As good practice you shouldn't even consider wiring two PIR's to the same cct, latching or not, it's just not recommended, do it once and do it properly.

[Guest]

As good practice you shouldn't even consider wiring two PIR's to the same cct, latching or not, it's just not recommended, do it once and do it properly.

:yes:

[Guest sparkyboy]

thanks for the replys folks, I think I get it now. It will probably be a case of when I do the first one the penny will drop.

thanks all

Mark

[Guest Gordon]

Hi All

Can someone explain to a stupid person (me) EOL wiring, when I used to install the od panel many moons ago you just had two power, two tamper and two alarm wires to the PIR, I'm just a bit confused about all this resistor stuff.

Regards

Mark

Older systems were either open or closed to indicate an alarm. They were easy to baffle because you merely had to short or cut the loop to prevent a trigger. So now they use End Of Line resistors to differentiate between the three posible loop states. The system can sense if the line is dead shorted or completely open circuit by checking to make sure that there is the correct resistance in the sensor loop. No correct resistance = alarm condition. Hope that helps...