It's the external bell that contains strobe light outside my house. Maybe called it SCB.
Connected as follows, 12v to 12v, strobe to strobe,OV to OV, This is were I have gone wrong, Bell to Trig then tamp to bell?
Now rectified, now wired bell/bell and tamp/trig. I am still left with a 'Tamper Fault Lock Out' message on my keypad.