CS-2029-W,  The CS-2029-w was shipped with an expensive,  'FORM C' relay, a relay


that has two contacts in one. The dealer decided which to use and eliminated the


other. This was expensive and a waste. The new CS-1829-C/O offers the same benefit


in choosing if the contact should be open, or closed, depending on the requirements of the


alarm panel by using a simple 3/8 inch single switch contact that is either open or closed.


It doesn't matter because the magnet on the unit is moveable to satisfy the zones on the


alarm panel.