K-1 2E / K-2 2E / K-3 2E
MAGNETIC CONTACT WITH EOL RESISTORS
k123-2e_en 09/19
The K-1 2E / K-2 2E / K-3 2E magnetic contact can detect opening of a door, window, etc. It has built-
in EOL resistors (2 x 1.1 k
Ω
) to simplify connection to alarm control panel zones programmed as
2EOL/NC. The K-1 2E magnetic contact is designed for surface mounting, and the K-2 2E and K-3 2E
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 K-1 2E and
K-2 2E enclosures are made of plastic, while the K-3 2E enclosure is made of metal. The contact has
2 wires. 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 K-1 2E 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.
