MC247

MC247 – Installation Manual

MC 247 Instruction Manual 4-MC247-01 © 2021 Alarmtech Rev. MC247_2150en Page 1 of 2 Detectors Magnetic Contact Recessed mounting Instruction Manual MC 247

DESCRIPTION

MC 24 7 is a versatile magnetic contact used in both alarm and security access control systems for protection of doors, gates and windows against unauthorized opening. Two reed switches enable a single MC 247 magnetic contact to be connected to two separate syste ms. 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.  Self-cutting and self-locking thread enables direct

installation in ф 10 mm holes in wood and plastic.

 Appropriate accessory must be used for installation in ferromagnetic environment.

CIRCUIT DIAGRAM

DISTANCE DIAGRAM - WOOD

TECHNICAL DATA

Working environment Wood Steel Make distance (both switches closed) typ. 23 mm see distance table Break distance (both switches open) typ. 29 mm see distance table Contact type form A, SPST Switching voltage max. 48 V DC/AC Switching current max. 500 mA DC/peak AC Contact rating max. 10 W Cable ф 3,9 mm, 6x0,182 mm2 Environmental class (EN50130-5:2011) IIIA Operating temperature range -40°C to +70°C Operating humidity range max. 95% r. h. Housing material aluminium alloy Dimensions: Contact part ф 11 x 37 mm Magnet part ф 11 x 37 mm Security grade (EN50131-2-6:2008) 2 Approvals VdS EN-ST-000096, SBSC 9-198, INCERT B-582-1003 0 5 10 15 20 25 30 35 -30 -20 -10 0 10 20 30 y [mm] x [mm] Make distance Break distance MC 247 Instruction Manual 4-MC247-01 © 2021 Alarmtech Rev. MC247_2150en Page 2 of 2

OPERATING PRINCIPLE

MC 24 7 magnetic contact has two parts: the contact part with reed switch es and the magnet part. In its neutral position the reed switch es remain closed under the force of the magnetic field. Opening the monitored object increases the distance between the reed sw itches and the magnet. This reduces the influence of the magnetic field on the reed switches until they open and activate an alarm. Magnetic contacts should not be installed in the vicinity of strong magnetic fields.

INSTALLATION

Detailed installation inst ructions can be found in MC 24 7 Installer Manual. 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 stationar y part of the monitored object (ex. door frame) and the magnet in the movable part (ex. door leaf). Before mounting, holes must be drilled. The self - cutting and self -locking thread of the housing enables easy and reliable installation in ф 10 mm holes in wood and plastic. Twisting the contact housing counterclockwise 2 -3 times before mounting will protect the cable from mechanical stress. 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 f or sites where recessed mounting is

not suitable. Heavy duty accessories protect the MC 24 7 from mechanical damage and provide a large operating distance enabling the magnetic contact to be installed on garage doors, industrial gates etc. Aluminium brackets can be used to mount the contact parts away from a ferromagnetic surface or to solve problems with aligning the contact with the magnet. Contact and/or magnet should be screwed to the oval slots in the brackets and adjusted to a suitable position. The wo rking 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. Make sure both reed switches operate correctly. Warning: applying excessive force to the housing of the contact may damage the glass body of the reed switches inside. Warning: appropriate accessories must be used for

installation in ferromagnetic environment.

DISTANCE TABLE

Contact Accessory Distance on wood [mm] Distance on steel [mm] Make Break Make Break

MC 247 - 23 29 X X

MC 200-S3 20 26 10a) 16a)

MC 200-S11 23 29 X X

MC 200-S12 34 40 18 21

MC 200-S21 23 29 X X

MC 200-S22 34 40 22 25

MC 200-S31 23 29 X X

MC 200-S32 34 40 18 21

MC 200-4, MC 200-5 44 55 X X

MC 200-4, MC 200-8 44 55 32b) 40b) MC 200-6, MC 200-5 44 55 32c) 40c) MC 200-6, MC 200-8 44 55 32c) 40c)

MC 200-7, MC 200-8 44 55 32 40

X – not recommended a) measured with MC 400-4 spacers (included in the MC 200-S3 set) b) measured with contact part installed 15 mm above the ferromagnetic surface (e. g. using MC L/MC Z accessory) c) contact part mounted on non-ferromagnetic surface We reserve the right to changes without notice. We reserve the right to changes without notice.