Re: Behavior of Disconnecting Keypad From Ademco 128BP Panel?

["autonut843" <hmjunk31415@xxxxxxxxxxx>]

I do not know, but here are some things rattling around the brain
cavity....
I wonder, if he interrupted the green "Data In From Keypad" wire, what
would that do?  I've never tried anything like this so don't know, but
would guess that then the K/P would still be powered and display stuff
OK, just not send keypresses back to the control panel.  Of course, if
the panel firmware polls the keypads periodically and expects a
response then this wouldn't work.

I'm not familiar with the 128BP so googled on it and read a sentence,
"Zone 7 may be used for keyswitch arming and disarming."  Maybe instead
of hooking the relay up to one or more of the keypad wires you could
hook it up to zone 7 and use the relay like a key switch.

Good luck, let us know how you end up solving it.