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

[Joe <joeraisin@xxxxxxxxxxx>]

autonut843 wrote:
> 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.

The Keypad will display Open Circuit Error while the databus is disrupted.
Switching the power would likely appear to work better but I have no
idea what the long term downside would be if you kept turning a keypad
on and off like that.


>
> 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.
>