Bosch 8-Dec - Manual (Page 353)

LSN Peripherals | LSN Magnetic Contacts | 345
EMK 36 AT LSN Surface-
Mount Magnetic Contact
Features
▶ LSN surface-mount magnetic contact
▶ VdS class B
▶ Parallel mounting
▶ LSN perimeter protection
Magnetic contacts are used for tear-off surveillance of
doors and windows.
Certifications and Approvals
Region Certification
Europe CE EMK 36 AT LSN
Germany VdS G 101504, B EMK 36 AT LSN
Installation/Configuration Notes
Installation notes
•
EMK 36 AT LSN installation is parallel.
• For installation on ferromagnetic materials, the
distance plates must be used.
•
The contacts are generally installed in the door or
window frames with the magnet in the window or the
door. If the door or window is opened less than 1 cm,
the magnetic contact should not be able to detect this.
An opening of more than 3 cm must be detected.
1 Contact
2 Magnet
Distances diagram (parallel mounting)
1 Extraction
2 Proximity switch part
Connecting LSN contacts
•
Every LSN contact is a physical LSN element (1 out of
127 possible per loop).
•
The length of LSN contact connection cables must be
included when planning the total line length of the LSN
loop, as LSN technology is incorporated in these
detectors.
• Passive coupling elements for joining the connection
cables to the installation cable must be placed as close
as possible to the LSN contacts. The 1 m connection
cable with 2 m LSN cable length is included in the
calculation of the LSN cable length (LSN is carried into
the contacts and back out again).
• Connector boxes (optional) are classified as installation
material.
Testing LSN contacts
•
Reed switch and microswitch functions can be checked
before installation by a high-Ohm multimeter or
continuity checker (for diode paths).
•
The resistance values are approximate values; a large
change in resistance is significant here.
1 Detector
2 High-Ohm multimeter
Contact open: approx. 3 MOhm
Contact closed: approx. 1 megaohm
Note Only the intrusion contact can be checked in
this way. The tamper switch of the Class C
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