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K-1 2E, K-2 2E, K-3 2E
The magnetic contacts consist of two elements: magnetic sensor (reed switch) and magnet. The reed switch, which is situated near the magnet, makes the electric circuit. Each of the magnetic contact elements is placed in an identical watertight housing, the part with reed switch having electric lead- outs (Fig. 1,2,3). Inside the housing together with the reed switch are installed two 1.1kΩ Fig. 1 K-1 2E reed switch in plastic housing resistors connected with the reed switch in 2EOL configuration (see Fig. 5). They enable the control panel to detect a tamper of the magnetic contact by monitoring the resistance changes on the zone. Each detector of this type must be connected to a separate zone of the control panel. Individual magnetic contacts differ in the Fig. 2 K-2 2E reed switch in plastic housing housing style and the way of mounting. The K-1 2E is designed for surface mounting and the K-2 E & K-3 2E for flush mounting. The magnetic contacts can be used wherever required for controlling the status of doors, windows and/or other movable elements, e.g. for protection or monitoring of access to particular sites, spaces, facilities; Fig. 3 K-3 2E reed switch in metal housing INSTALLATION – Fig. 4
The magnetic contact element containing the magnet should be mounted on the movable part, while the
reed switch – on the stationary part of protected doors, windows, etc. Elements of the K-1 2E magnetic
contact should be attached to the surface by means of screws, suitable glue, or a two-side self-adhesive
tape. The K-2 E & K-3 2E magnetic contacts are designed for face mounting in such materials as wood
or plastic (Fig. 4). The walls, the magnetic contact is to be fitted in, should be at least 10 mm thick, so as
to ensure adequate stability for the elements mounted. To make holes for the K-2 2E and K-3 2E
magnetic contact, use ø9 mm drill. The K-2 2E is to be pressed in, while the K-3 2E, which has a thread,
needs to be screwed in. The mounted magnetic contact elements can be reinforced with a suitable glue.
The magnet must be located within the operating gap (make distance). Misalignment of the axes of
magnet and reed switch in cylindrical magnetic contacts should not be greater than 10 mm for K-2 2E
and 12 mm for K-3 2E.
Notes:
• You are in no case allowed to shorten (cut short) the element containing the magnet. • Special care must be taken when installing reed switch. It should not be hammered into the slot, because the fragile component inside might be damaged then. • When screwing the K-3 2E reed switch in, the wire will get twisted; to prevent it from damage, make sure that it has a sufficient spare length, or twist it in the opposite direction before installation so that it can straighten out when mounted. Fig. 4 Example of face mounting of K-3 2E magnetic contact HOOKUP – Fig. 5
Fig. 5 Connection of the magnetic contact with 2EOL resistor to the control panel. SPECIFICATIONS
Magnetic contact type.2EOL/NC Resistance .2 x 1.1 kΩ Maximum switching voltage.20 V Maximum switching current .20 mA Life expectancy (20 V, 20 mA). min. 360 000 cycles Contact material. Ru (ruthenium) Make distance: www.satel.eu/ce

Source: http://satel.eu/en/download/instrukcje/k123_2e_io_en_0711.pdf