Alarmtech MC 272 Instruction Manual

MC 272 Instruction Manual
Detectors
Instruction Manual
DESCRIPTION
MC 272 is a versatile high security magnetic contact used in
both alarm and security access control systems for
protection of doors, gates
unauthorized opening and against external magnetic field.
A range of accessories makes the contact suitable for a
variety of applications.
MOUNTING INSTRUCTIONS

Contact and magnet should be installed axially,
corresponding to each other (the distances in table
below are when contact and magnet are moved away
from each other axially).

Self-cutting and self-locking thread enables direct
installation in ф 10 mm holes in wood and plastic.
TECHNICAL DATA
Working environment
Sabotage distance
Make distance
Break distance
Contact type
Switching voltage max.
Switching current max.
Contact rating max.
Cable
Environmental class (EN50130-5:2011)
Operating temperature range
Operating humidity range
Housing material
Housing protection class
Dimensions:
Contact part
Magnet part
Approvals:
Security grade (EN50131-2-6:2008)
Approvals
1)
Make distance is always shorter than break distance
© 2023 Alarmtech
and windows against
Wood (Y direction)
max. 5 mm
typ. 20 mm ± 40 %
typ. 26 mm ± 40 %
form C, SPDT
48 V DC/AC
250 mA DC/180 mA AC
5 W
ф 3,6 mm, 5x0,182 mm
Class IIIA
-40°C to +55°C
max. 95% r. h.
aluminum alloy
IP 67, IK04
ф 11 x 36 mm
ф 11 x 36 mm
3
VdS EN-ST-000271, SBSC 9-206, NF&A2P 2134030001D0
Rev. MC272_2302c_en
CIRCUIT DIAGRAM
OPERATING PRINCIPLE
MC 272 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
causes a change in position of the reed switch and as a result
– a path of the signal.
MC 272 has an extra sabotage reed switch to protect the
contact from sabotage with an external magnet. When an
external magnet is applied to the contact, the sabotage reed
switch opens and activates an alarm. The sabotage switch
can be also opened by the corresponding (friendly) magnet.
The distance between the contact and the corresponding
magnet, at which the sabotage reed switch opens is called
sabotage distance.
Magnetic contacts should not be installed in the vicinity of
strong magnetic fields.
1)
Wood (Z direction)
max. 5 mm
typ. 25 mm ± 40 %
typ. 31 mm ± 40 %
2
4-MC272-01
Magnetic Contact
Recessed mounting
MC 272
1)
Steel
not recommended
not recommended
not recommended
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