Brad,
This is the Genesis, I remember the a-d split of the zone you had a different resistor for each detector, it was a pain on a service call as high resistance on a cable would really mess you up
also the plug on connection for the MLI units need a special tool to crimp properly or your connection could go dodgy and cause all sorts of GIL status marginal high or low
As far as I know Securicor Granley used to make them in the UK we could order separate circuit boards from them they looked like old PC cards, Securicor Dublin stopped using them around 2000, still a few around in schools and colleges in Dublin.
Jnealon,
That's the very panel a KES, I came across a Merlin 150 in the stores and the programming is the exact same
The engineer manual lets you program fine
Thanks for the help