Honeywell IQ8Control C Installation Instruction page 63

Mode of analog loop operation
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The esserbus
/esserbus
The use of zone isolators allows you to combine ring and spur loops as well as divide the analog loop into 127
detector zones with a total of 127 loop devices. All esserbus
interruption (break in wire) in the analog loop. If a short circuit occurs, only the faulty element between two zone
isolators will be disconnected. Even during this malfunction all other loop devices remain operational.
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On the esserbus it is possible to group special fire detectors and manual call points or manual release devices
in separate detector zones. You may also simultaneously operate esserbus
zones on the analog loop. The esserbus
installed as loop devices on the esserbus
Commissioning a wired and functional analog loop requires use of the service PC and the software tools 8000
This Service software initiates an automatic wiring recognition function on the analog loop and addresses all
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esserbus loop devices automatically. There is no longer any need to set addresses manually. For further
information on programming, please refer the online help for the programming software tools 8000.
To indicate a data communication between FACP and detectors the corresponding LED on the basic module
flashes. The green LED of the IQ8Quad fire detector flashes each 30 seconds.
Operation of zone isolators
A short circuit on the analog loop will cause the cut-off relays to open in the relevant zone isolator and
disconnect the faulty segment (e.g., a detector zone) from the analog loop. The disconnected detectors will be
shown on the alphanumeric display with trouble message Com.trbl (communication trouble). All other loop
devices on the analog loop, as well as the fire detectors or esserbus
triggered, will remain operational. The zone isolators do not work on an open circuit, e.g. break in wire.
Bi-directional ring interrogation keeps all loop devices on the analog loop functional.
All Fire detectors series IQ8Quad provides an integrated loop isolator. For additional loop devices optional
isolators are available.
Use of zone isolators
1. Always upstream of the point where the analog loop crosses into another fire compartment
2. On changing from special fire detectors to manual call points (and vice versa)
3. At least in the 32nd fire detector of a detector zone
Fire alarm systems in accordance to the German VdS-Guidelines (VdS Schadenverhütung
GmbH, Köln) must not be installed with more than 512 automatic fire alarm detectors per
panel.
In VdS approved systems, failure of a maximum of 32 detectors on the analog loop, e.g., a
detector zone, is permissible in the event of a trouble incident. A zone isolator must be installed
in at least the 32nd detector in a detector zone.
FB 798951.GB0 / 01.09
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PLus is a monitored two-wire loop fed from two sides and exhibiting loop topology.
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transponders are decentralised input/output modules capable of being
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Fire Alarm Control Panel IQ8Control C/M
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loop devices remain functional in the event of
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transponders in separate detector
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transponders whose zone isolator has
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