Alarmtech MC 346 User manual

MC 346 Instruction Manual 4-MC346-01

Detectors

Magnetic Contact

Recessed mounting

Instruction Manual MC 346

DESCRIPTION

MC 346 is a versatile magnetic contact used in both alarm

and security access control systems for protection of doors,

gates and windows against unauthorized opening. A wide

range of accessories enables the contact to be recessed- or

surface-mounted on a variety of surfaces, including

ferromagnetic materials.

MOUNTING INSTRUCTIONS

Contact and magnet should be installed axially,

corresponding to each other.

Catch-bolts on the housing enable direct installation in

ф8 mm holes in wood.

Appropriate accessory must be used for installation in

ferromagnetic environment.

CIRCUIT DIAGRAM

OPERATING PRINCIPLE

MC 346 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.

Magnetic contacts should not be installed in the vicinity of

strong magnetic fields.

TECHNICAL DATA

Working environment

Wood

Steel

Make distance

typ. 15 mm ± 40%

Not recommended

Break distance

typ. 17 mm ± 40%

Not recommended

Contact type

form C, SPDT

Switching voltage max.

48 V DC/AC

Switching current max.

250 mA DC / 180mA AC

Contact rating max.

5 W

Environmental class (EN50130-5:2011)

IIIA

Cable

ф 3,6 mm, 5x0,182 mm2

Operating temperature range

-40°C to +70°C

Operating humidity range

max. 95% r. h.

Housing material

plastic ABS

Dimensions:

Contact part

ф 9 x 36 mm

Magnet part

ф 9 x 25,5 mm

Security grade (EN50131-2-6:2008)

MC 346 Instruction Manual 4-MC346-01

INSTALLATION

Contact and magnet should be aligned axially in the frames

and leaves of the monitored objects (windows, doors etc.).

Offset will reduce the working distances. The contact should

be mounted in the stationary part of the monitored object

(ex. door frame) and the magnet in the movable part (ex.

door leaf). Before mounting, holes must be drilled. Catch-

bolts on the housing enable direct installation in ф8 mm

holes in wood.

For sites where it is impossible to mount the contact

directly, a variety of accessories is available.

Accessories with a strong magnet provide a bigger working

distance for more demanding applications and maintain the

parameters of the magnetic contact when mounted in

ferromagnetic environment.

Accessories for surface mounted applications provide

installation solutions for sites where recessed mounting is

not suitable.

The working distances of the magnetic contact will be

decreased in the proximity of ferromagnetic surfaces. The

closer the contact/magnet is installed to the ferromagnetic

surface, the lower the working distances

Only non-ferromagnetic screws may be used when mounting

the contact using accessories.

After the installation, use an ohmmeter to check the

electrical connections and test the function of the magnetic

contact.

Please note:

Applying excessive force to the housing of the contact may

damage the glass body of the reed switches inside.

Applying excessive force to the magnet can have a negative

impact on the magnetic field.

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