Page 218 - Advanced Course

KNX ADVANCED COURSE

In addition to cover surveillance which adapts itself automatically to the local conditions,
passive infrared detectors of VdS class C for high security requirements have an alarm
memory as well as processor monitoring, whereby a high level of detection and
interference immunity is guaranteed.
The monitoring area of this movement detector can be changed from volumetric to long-
range or creep zone protection by replacing the lens.
The signalling of the fault and cover surveillance is carried out by a potential-free contact.
The connection of the movement detector is eight-core or ten-core if the walk test and
alarm memory should be controlled remotely.

Infrared motion detector
The detector is fitted with a long zone lens and contains anti-masking circuitry.
The sabotage zone is interrupted by a removal contact if the detector is disconnected from
the wall. The function of this contact can be deactivated.

Dual detector
This motion detector carries out monitoring using both infrared and an electromagnetic
field. Its monitoring area is volumetric. Its monitoring techniques are electronically linked
so that the motion detector only reports an alarm if both elements have detected an
attempted break-in.
The sizes of the two monitoring areas can be set separately. The dual detector has both
anti-masking circuitry and an alarm memory and can also carry out a walk test.

Panic alarm
The panic alarm (emergency call button) contains an alarm contact (normally closed
contact) that is triggered manually by pressing a button, thereby interrupting the panic
zone. The built-in tamper contact (normally closed contact) interrupts the sabotage zone
when an attempt is made to open the contact.
The connection of the detector is carried out as six-core. It can be supplied as a surface-
or flush-mounted version.

Contact locks
The contact lock serves as a remote switching device. When used as an arming device, a
locking element should be inserted in the access door to the protection area so that it is
not possible to enter the armed area accidentally.
The contact lock is fitted with two changeover contacts - one is operated when the lock is
turned anti-clockwise and the other when the lock is turned clockwise. Operation is carried
out via a conventional profile half cylinder. It is possible to choose between a key or
switching function for the contacts.
This enables for example the combined use of the contact lock as a remote reset button
and arming device from one or more locations. Two built-in LEDs enable the operating
states of the control unit to be displayed (e.g. set/unset and ready for set). An
acknowledgement buzzer is integrated into the contact lock. The required number of cores
for the connection cable differs depending on the function of the contact lock. 12 cores are
however sufficient in any case.

Home and Building Management Systems KNX Association
Security Technology Security Technology_E1211a.docx Page 25/32