Hello,
The Texecom grade 3 sounder has a few additional wires compared to a grade 2 version. How do wire a Texecom grade 3 sounder with a Scantronic 9651?
Grade 2 is very easy, it only requires 5 wires.
12v, 0v, OPT1 (Bell ), OPT2 (Strobe), TR (Tamper return)
Looking at intall instructions...