Thanks for this Dodgydave. I am assuming that it is possible to detect this happening on NC at the alarm box. Would it be possible for someone to explain how I could detect this on the wires coming from the NC terminals remotely with a micro controller or something similar?The pir is designed for a specific panel that uses positive loop detection, the transistor pulls the nc terminal to ground via a 100 ohm resistor when no detection is present, then when it detects an heat source like a person, it removes the ground and goes open circuit.
Thanks again for all the help so far.