S-1 / S-2 / S-3
MAGNETIC CONTACT
s123_en 08/19
The S-1 / S-2 / S-3 magnetic contact can detect opening of a door, window, etc. Additionally, it is
provided with a tamper loop. The S-1 magnetic contact is designed for surface mounting, and the S-2
and S-3 magnetic contacts – for flush mounting.
1. Description
The device consists of a contact (reed switch) and a magnet. Moving the magnet away from the
contact (opening the door or window) opens the reed switch contacts (thus triggering alarm).
Both magnetic contact elements are placed in identical waterproof enclosures. The S-1 and S-2
enclosures are made of plastic, while the S-3 enclosure is made of metal. The contact has 4 wires.
The two twisted wires are a tamper loop. The contacts are shown in the figures below.
2. Installation
The contact should be mounted on a fixed surface (e.g. window or door frame), and the magnet on
a movable surface (e.g. window or door). Do not install the magnetic contact on ferromagnetic
surfaces and near to strong magnetic and electrical fields, because it can result in malfunctioning of
the device. When mounting the magnetic contact, you must take into account the make distance.
The S-1 magnetic contact is designed for surface mounting. Place the contact and magnet in parallel
next to each other (Fig. 4). The magnetic contact elements can be attached with screws, double-sided
tape or glue.
The S-2 and S-3 magnetic contacts are designed for flush mounting in wood or plastic. Place the
contact and magnet facing each other (Fig. 5 – as shown by the example of S-3). To make holes for