you will need to connect the cables from the roller shutter contact to the cable you have run for your garage contact, this is usually done in a junction box
The TD motion sensor would be compatible with any control panel, so yes also with the R8. It can be wired in ID, double pole or end of line, and if the zone is programmed for chime, then this facility would work
Regards
Sec ware Team
Regretfully we do not have any one who is really knowledgeable on this unit, hopefully one of our forum members will be able to give some direction, or try ACT direct on 0845 300 5204.
Hope your problem can be rectified
Regards
we are not aware of the 500R giving a 'reading', we suspect that the LED showing a fault could be a jamming fault, if you have any further information then we could maybe be of more help.
Regards
1. The MHz of the items are shown on the web site
2. Prices do not include VAT, this is added at the end and is 20%
3. The items we stock are shown with prices on the web site + vat
Hope this helps