I have a Visonic PowerMax alarm system which I want to extend to include new PIRs. I've bought some Visonic PowerCode™ Wireless Digital Next 12m PIR Detectors (868) however when I try to enroll them with the control panel it does not detect the new PIRs. I am following the instructions about pressing the two tamper switches to send a signal.

I suspect it is something to do with the 868 frequency - anyone know how to see what frequency my control panel and the rest of the system is operating at?

It looks like the claim "Compatible with PowerMax™ and all Visonic PowerCode™ wireless panels and receivers" should have a disclaimer about frequency.

Thanks for any help.