Re: GEM-RP1CAE2 & 2x 8 zone Expanders - 17-24 zone OPEN

["Total nerd" <geekboy0001@xxxxxxxxx>]

This is almost always because there is either an overlap in devices
calling for the same zones, or a gap/hole in zone sequence.  Make sure
each keypad has its zone expander disabled and only enable the one you
want.  Then, set the two zone expander modules and keypad in
consecutive order, leaving no gaps in zones and making sure not to
overlap.  Each zone you're not using will display as OPEN on the panel.
 Just put an EOL resistor across it or illiminate that zone from the
area in the programming so it ignores it.