How to Install Magnetic Door Switches. Connecting magnetic reed switches for wired alarm systems. How to mount recessed alarm contacts and magnets on doors. Garmin Mobile Pc 5.00.60g. Tane Alarm Products has been manufacturing magnetic alarm contacts since 1984, combining the highest quality electromechanical reed switches with high power magnets.

1 Run a length of two-conductor alarm wire from the alarm panel to the window or door where you will install the magnetic contact switch. Wiring to the panel commonly runs through the walls and attic to reach the panel. Drill a 1/4-inch hole in the door or window frame near the switch-mounting location to feed the wire to the switch from the attic. Typically, the switches should mount along the side of the bottom sash of a double-hung window (inside the house), along the top of a sliding window, or along the side of a door above the door handle.

How to Fit Magnetic Contacts This article outlines the steps in fitting magnetic contacts to an alarm system. Introduction Magnetic contacts are two part devices comprising a reed switch and a magnet. They are almost exclusively fitted as normally closed devices (NC) where the reeed switch is held closed circuit by the magnet. On removing the magnet the reed switch goes open circuit. Magnetic contacts are available in a multiple of design variations ranging from small diameter flush fitting versions to heavy duty roller-shutter door surface mounted versions. The operating gap (the distance from the magnet to the switch) varies from around 15mm for small contacts to 65mm for large contacts.

The contacts are also available as pre-wired versions (connected into a local junction box) or with terminals (usually 5 terminals, 2 for alarm and the other 3 for looping in other detectors). Magnetic contacts are wired using 4 core cable (2 for alarm and 2 for tamper). More than one magnetic contact can be connected to a zone using one length of 4 core and if required magnetic contacts and powered detectors (e.g. PIRs) can be wired to the same zone but in this case 6 core cable will be required for the powered detectors. When positioning magnetic contacts bear in mind the following. • The contact should be fitted at or very near to the opening edge of the door or window i.e. Not near the hinge.

• It is usually preferable to fit the contact near the top of the door or window in order to prevent moisture ingress and/or physical damage. Obviously with roller shutter doors and the like, the contact has to be fitted where it will be most effective. • Do not position the contact where there is a lot of play in the door when closed, also make sure that all doors and windows stay shut when closed - you may have to reposition the door catch to eliminate any excessive play.

Fitting Magnetic Contacts This section describes the physical fitting of variouds types of magnetic contact. The electrical connections are described below. • Surface mounted magnetic contacts • Flush mounted magnetic contacts Fitting a single surface mounted magnetic contact - terminal type This describes the fitting of a single magnetic contact, i.e. Wired at the end of a series or connected directly to the control panel. The contact as supplied comprises a magnet (fitted to the moving part e.g.