Hello: I have bought a PIR BENTEL VISUS99 (model a) http://www.secpoint.it/listing/Manuali/Antintrusione/Bentel/VISUS99.pdf,
and I don´t know how to connect to arduino. I was looking for tutorial PIR and only have three cables: GND, +5V and OUTPUT, but this VISUS99 PIR have two for 12V that I use a power supply but have two more cables to connect (N/C), Do you know how to do it?. Do I have to put any resistor to get pir input? thank you very much.