Galaxy 16 multiple pir same zone

[PAULTRUDY]

hi i have a galaxy 16 - currently have 8 door contacts and 8 pir but need to add an extra pir

the door contacts are cqr sc570 and the pir pyronix kx15dt

i know i will need to double up 2 sensors onto 1 zone
how can u connect either 1 door contact and 1 pir or 2 pir to same zone i have 8 core cable available

 

[Deryck Tintagel]

I am not an alarm professional but I would not double up on PIR. Door contacts are a maybe - I may double up on contacts that are on say double doors - one on each side, for example.

Do you have a sketch of how the contacts / PIR are laid out? Do you need all eight contacts?

 

[Handymanjo]

Have you already got a Rio expander installed ?
You can have multiple devices on a zone but it is not advised.
Wiring diagram shows how this can be done.