Honeywell 955WH

The Honeywell 955WH is a plunger switch with wire leads that is commonly used as a tamper switch to protect alarm sirens and alarm control panels.

The 955WH is a Form A, SPST, normally closed plunger switch that can be wired to an open zone on an alarm control panel. The contact rating of the 955WH is 100mA at 28VDC. If you use the 955WH as a tamper switch, make sure to program the zone as a zone type (5), trouble by day/alarm by night. If you use the 955WH as a plunger switch contact to protect windows or sliding doors, program the zone as a perimeter or entry/exit delay zone type.

You will need to run a wire from your alarm control panel to the intended mounting location of the 955WH to install the plunger switch. If you are using the 955WH to protect a window or sliding door, you will also need to drill a hole with a 5/8” diameter in the frame of the window or sliding door. You should make the hole along the bottom edge of the window frame so that when the window is closed, the plunger switch is depressed. With sliding doors, you should position the hole along the vertical edge of the door frame so that the door will hit the plunger switch straight on and depress it when the door is closed. After making the hole, press the 955WH plunger switch into the hole so that it is flush with the door or window frame. Only the plunger switch should be sticking out. Use the wire leads coming out of the backside of the switch to splice the connection to your zone wiring. Make sure to use wire crimps or tape to cover any exposed wire.

If you want to use the Honeywell 955WH as a tamper switch to protect and alarm siren cabinet or alarm control panel cabinet, simply mount the plunger switch to the inside of the cabinet so that when the door to the cabinet is closed, the plunger switch is depressed. If someone tries to open the cabinet, even if the system is disarmed, a tamper alarm will occur. If you have the zone programmed as a tamper, it will trigger a latched trouble signal if the system is disarmed and an actual alarm if the system is armed.