Bosch 8-Dec User Manual

LSN Peripherals | LSN Magnetic Contacts | 357

▶ LSN surface-mount magnetic contact
▶ VdS class C
▶ Tamper switch
▶ Parallel or head-on surface mounting
▶ LSN perimeter protection

Magnetic contacts are used for tear-off surveillance of
doors and windows.

Europe

CE

MSE/MSA-LSN B/C

Germany

VdS

G 104006, C   MSE/MSA-LSN C

DE

VdS

G 104006, C

•

Head-on or parallel surface mounting.

•

The surface mounting version is implemented via the

AG4 surface mounting housing and enables installation

on ferromagnetic materials.

1

Contact

2

Magnet

3

AG4 surface mounting housing

4

Plastic part

5

Magnet offset in the axial direction

6

Warning! The adjustment mark must point to the magnet.

•

Each 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.

•

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 megaohm

Contact closed: approx. 1 megaohm

Only the intrusion contact can be checked in
this way. The tamper switch of the Class C
magnetic contact can be checked by the LSN
control panel or with the LSN testing device
(software version 3.x onward).