Alarmtech MC 740-E-M14 User manual
MC 740-E-M14 Instruction Manual 4-MC740-E-M14-01
© 2020 Alarmtech Rev. MC740-E-M14_2048en Page 1of 2
Detectors
Magnetic Contact
Surface mounting
Instruction Manual MC 740-E-M14 and MC 740-PE-M14
DESCRIPTION
MC 740-E- M14 is a surface mounted magnetic contact used
in both alarm and security access control systems for
protection of doors and windows against unauthorised
opening. The magnetic contact is designed to be mounted in
places with limited space. The magnet part is easy to mount
with supplied rivet or screw.
MC 740-PE-M14 is a variant of MC 740-E-M14 with the cable
inlet at the bottom of the housing is available.
CIRCUIT DIAGRAM
OPERATING PRINCIPLE
MC 740-E-M14 magnetic contact has two parts: the contact
part with a reed switch and the ring 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.
TECHNICAL DATA
Working environment
Wood
Steel
Make distance
typ. 25 mm +/–40 %
not recommended
Break distance
typ. 28 mm +/–40 %
not recommended
Contact type
form A, SPST
Switching voltage max.
48 V DC/AC
Switching current max.
400 mA DC/peak AC
Contact rating max.
10 W
Cable
ф 3,4 mm, 4x0,182 mm2
Operating temperature range
-40°C to +55°C
Operating humidity
max. 95% RH
Housing material
plastic ABS
Dimensions:
Contact part
60 x 5 x 14 mm
Magnet part
Ф14 x 3,5 mm
MC 740-E-M14
MC 740-PE-M14
MC 740-E-M14 Instruction Manual 4-MC740-E-M14-01
© 2020 Alarmtech Rev. MC740-E-M14_2048en Page 2of 2
INSTALLATION
Depending on the application, contact and magnet should be
installed in either front-to-front or side-to-front
configuration. Installation drawings show the correct
positioning of the contact parts. The contact should be
mounted on the stationary part of the monitored object (ex.
door frame) and the magnet on the movable part (ex. door
leaf, roller-shutter).
During installation of contact part of MC 740-PE-M14 in
window or door frame, it is advised to leave additional cable
loop for about 10cm long.
After the installation, use an ohmmeter to check the electrical
connections and test the operation of the magnetic contact.
Warning: applying excessive force to the housing of the
contact may damage the glass body of the reed switches
inside.
Warning: installation in ferromagnetic environment is not
recommended.
INSTALLATION DRAWINGS
For optimal working distance of the reed switch the magnet
should be placed in a vertical position above the screw hole
of the contact part.
MC 740-E-M14 / MC 740-PE-M14 in front to front
configuration
MC 740-E-M14 / MC 740-PE-M14 in side to front
configuration
We reserve the right to changes without notice.
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1
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