robjg63:

 

Actually, I don't understand how the PIR motion detectors are wired up. They are Micron TX2 sensors and they have only three wires which connect to the Z6L.

 

I did a lovely diagram with the Z6L and worked out where pretty much everything went.

 

The positive and negative (to power the PIR) and a third wire that is just connected to the appropriate Zone connector on the Scorpion Z6L. 

 

There is nothing in the GND for each zone. No idea how that could be connected to the Konnected board...

 

 

 

 

Instead of using the blue to complete the sense circuit they are using the the negative.

The sense circuit is generally a sense terminal back to a common terminal, sometimes positive, sometimes negative.

This way saves using the fourth wire which can be handy for adding another zone near an existing zone.