Alarmtech MC 140 Instruction Manual

MC 140 Instruction manual
Detectors
Instruction manual

DESCRIPTION

The magnetic contact MC 140 is designed for recessed
mounting in frames of doors and windows as a
protection against unauthorised opening. It has 4 screw
terminals.

MOUNTING INSTRUCTIONS


The magnetic contact is designed to be mounted in
predrilled holes in wood or plastic with diameter Ø 19-20
mm
 Mounting in ferromagnetic material is not recommended
 The contact and magnet should be mounted axial towards
each other. The contact in the stationary part of the
monitored object (ex. door frame) and the magnet in the
movable part (ex. door leaf)
 Alignment marks should point in the same direction

After the installation, use an ohmmeter to check the
electrical connections and test the function of the
magnetic contact.

ALIGNMENT MARKS

© 2023 Alarmtech

CIRCUIT DIAGRAM

OPERATING PRINCIPLE

MC 140 magnetic contact has two parts: the contact part with a
reed switch and the magnet part. In its neutral position the
reed switch remains closed under the force of the magnetic
field. Opening the monitored object increases the distance
between the reed switch and the magnet. This reduces the
influence of the magnetic field on the reed switch until it opens
and activates an alarm.
Magnetic contacts should not be installed in the vicinity of
strong magnetic fields.
Rev. MC140_2308_en
4-MC140-01en
Magnetic contact
Recessed mounting
MC 140
Page 1 of 2