The detector control and indicating equipment of the ZETFAS
system consists of:
- ZETFAS 1000, wall casing for 8 loops
- ZETFAS 3000, free-standing cabinet for 24 loops
- Power supply 24 V DC 4A, 8A or 12A
- Central computer
- Control and indicating unit with or without printer in 12 different
- Loop base modules for the loop computers.
- Alarm unit with the 32 or 64 monitored alarm line outputs
- 3 to 9 serial interfaces
- Diverse drive and relay boards
Each loop can be operated with 127 loop devices. These devices
may be automatic sensors or non-automatic detectors,
input/output devices, indicator lights, indication modules and
extinguisher actuators according to standard interface (SST)
of the Association of Property Insurers.
Each loop device is self-isolating against short-circuit, i.e.
with a short-circuit or wire break on the loop (detection system
DN) none of the 127 devices fails. The location and details
of these line faults are, of course, indicated in detail on
the control panel display.
Both ZETFAS system devices and detectors of the older generation
(STI sensors, 2-wire and 4-wire technology) and detectors
alien to the system such as the Apollo type can be integrated
in the detection system via adapters as spur lines.
Up to 32 zones can be formed in each loop, whereby the detectors/
sensors can occupy optional positions in relation to
each other in the loop. Zone dependences overlapping loops
are just as freely programmable as detector dependences.
The control and indicating unit of the control panel can be an
integral part of the control panel casing or arranged separately
via serial interface. This is known as "black-box operation"
of a system.
The control and indicating unit contains large function keys
and operator guidance is effected by the large 16-line graphic
display. This control and indicating unit can be supplied with
or without a printer and is obtainable in 12 different versions
for European countries.
Events such as alarms, faults, disablements, etc. can be freely
assigned to the outputs, such as transmission unit, alarm
lines and control lines by programming.
Any number of remote controls, indication modules, alarm
management systems (AMS), outside computers (house control
systems) and detector control and indicating equipment
can be linked via serial interfaces.