Central alarm unit
Product name:
Central alarm unit (CAU)
Design:
aP (surface-mounted)
Ref.-no.:
EAM 4000
Security/Central alarm unit/Central alarm unit
ETS search path:
Issue:
07.07.2003
Functional description:
This KNX Central alarm unit (CAU) is the heart of an efficient alarm system. Owing to the utilization of the KNX,
expensive additional cabling work can be reduced to a minimum. Both the KNX system and individual detectors
installed can, for example, also be used by other trades.
By many different parameterization options within an ETS plug-in of its own, the KNX Central alarm unit facili-
tates its use in various kinds of buildings – from the detached family house with outer shell and interior room
safeguarding up to the office building where up to four safeguarding areas (SA 1...4) can be protected individu-
ally or as groups linked up with one another. The ETS plug-in will be automatically started when the parameter
setting option is called.
The KNX Central alarm unit stands out for the following performance features:
• Up to 160 detectors can be managed and integrated into up to four separate safeguarding areas.
• All sensors (detectors) are connected to the Central alarm unit via the KNX. This facilitates individual identifica-
tion and monitoring of all detectors.
• All events (arming, alarm, fault) will be logged together with their date and time and saved.
• The alarm indicators (siren, flashlight, alarm transmission device (ATD)) can be directly connected to the Cen-
tral alarm unit or triggered via the KNX.
• A rechargeable emergency battery facilitates uninterrupted operation of the alarm indicators even in the event
of mains failure. An intelligent electronic charging circuit ensures that emergency power supply of at least
12 hours will always be guaranteed.
• Display and operation are exclusively decentralized and can be handled via external KNX devices (info display
unit, pushbutton sensors, etc.). Sometimes, several types of arming devices (AD) can be used within an arming
area (AA 1...AA 4) for arming and disarming.
• A local detector input (wired detector) can be used for safeguarding the place of installation of the Central
alarm unit, e. g. in a distribution cabinet. Thus, the Central alarm unit will be in a position to protect 'itself'.
• An additional relay contact in the form of a potential-free output can, for example, be used for additional alarm
indicator applications.
For fire and attack detectors, separate safeguarding areas are reserved. If a detector from one of such safe-
guarding areas responds an alarm will immediately be raised, regardless of the state of the system.
As a special variant, the Central alarm unit can also be solely used for attack and fire detector applications.
A detector test mode is available, by means of which all detectors of the alarm system can be checked without
raising any alarm.
Particularly large buildings (arcades, extensive factory units) can possibly not be safeguarded by one Central
alarm unit alone but require several Central alarm units, each of them monitoring partial complexes. When sev-
eral KNX Central alarm units are used, such Central alarm units can monitor one another by sending and receiv-
ing telegrams for mutual monitoring. After three missing telegrams from the 'partner Central alarm unit', a sabo-
tage signal will be released (armed: alarm, disarmed: fault).
KNX / EIB
Product Documentation
Page: 1 of 81
Actuator/Sensor
Hardware Description
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