Global Fire Equipment NODE+, Руководство по установке

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ANALOGUE LOOP(S) DETAIL
The Analogue Loop provides the connection to all the analogue
addressable devices and loop powered sounders. Unless the loop
return is closed and completed, the panel will not be able to
monitor its integrity (open and short circuit monitoring).
Devices that can be fitted to the Analogue Loop include smoke
sensors, heat sensors, Zone Monitor Units (ZMU’s), I/O units, loop
sounders and manual call-points.
Refer to the devices manual for connections diagrams. If no manual is available, make the connections as shown below:
NOTE: A maximum of 32 manual call-points can be fitted into an Analogue loop. If this value is exceeded, the response
time for certain types of call-point will be excessive.
For Integrity of transmission paths it is recommended the usage of short-circuit isolators on the Analog Loop.
Such application is directly related with the installation physical layout and should be applied accordingly in a way to limit
the consequences of faults in the Analog Loop.
The accepted consequences of faults using short-circuit isolators are specified in national guidelines for planning, design
and installation of fire detection and fire alarm systems (codes of practice), etc. and may be different in different
countries.
Nevertheless it is recommended never to exceed 32 detection devices on the same path or zone without the usage of
short-circuit isolators. Meaning that in an event of a short-circuit, no more than 32 detection devices should be affected.
For isolator devices recommendation, search “isolators” on our website. Isolator example: GFE-AD-ISO.
CONVENTIONAL SOUNDERS DETAIL
Conventional Sounders is the term used to describe conventional alarm sounders (or
polarized bells) connected directly to a Panel. Loop-powered Sounders are different
and are connected to the Analogue Loop.
Two Conventional Sounder circuits are provided on the Panel. More than one
Conventional Sounder may be connected to each circuit. Total Max. Current
rating/Output is 500 mA @ 28.5 V DC nominal.
All Conventional Sounder circuits are monitored for open and short circuit faults. If a
Conventional Sounder output is not used, then a 10K resistor must be connected
across its output terminals.
WARNING:
The total current load of all detection loops, sounder circuits and auxiliary supply outputs should not
exceed the maximum power rating of the panel. Please refer to the technical specification tables.
NODE+ / Installation & Commission Manual / © GFE 220331 18