Each keypad has one zone input, can directly connected with a detector or
     magnetic contact to expand one zone.
● When active double zone function, once enter double zone make the zone double.
● Each zone has tamper proof display.
● Normal arming, home arming, double home arming, force exit arming, single button normal arming,
    single button home arming, single exit rearming, auto timely arming, key switch arming etc.

PA728: Single zone: (4+2)
                 Double zone: (8+2)
PA738: Single zone: (6+2)
                 Double zone: (12+2)
PA748: Single zone: (12+2)
                 Double zone: (24+2)