EQUIPMENT: T1200-C
PUBLICATION: MARINEC-P-A
ISSUE No. & DATE: 3 02/14
© 2014 Thorn Security Ltd PAGE 45 of 67
Registered Company: Thorn Security Ltd. Registered Office: Dunhams Lane Letchworth Garden City Hertfordshire SG6 1BE
boards)
Any output programmed as Delayed will not
operate while the 2-minute delay timer is running.
17.4 Configure Machinery Space
Zones
Having selected the DIL switch for configuring
machinery space zones the required zone can be
selected via the Cursor Select feature and can be
set as either a Machinery Space Zone or a
Standard Zone. If the zone is a Machinery Space
Zone, then the appropriate zone fault LED will be
illuminated.
A fire condition on a Machinery Space zone will
operate the Machinery Space Fire Detected output
relay on the C1714 Voyage Data Recorder Output
Module.
The sounder operation in CREW mode is also
affected by machinery space zones (see section
16.7).
17.5 Configure Non-Latching Zones
Having selected the DIL switch for configuring non-
latching zones the required zone can be selected
via the Cursor Select feature and can be set as
either a Non-latching Fire Zone or a Latching Fire
zone. If the zone is a Non-latching Fire Zone, then
the appropriate zone fault LED will be illuminated.
The Non-latching Fire zone facility is primarily
provided to allow multiple panels to be linked
together via the Fire Protection relay and non-
latching zone without causing a system lock-up
condition, where the connected panels cannot be
reset from the alarm condition.
A fire condition on a zone configured to the non-
latch fire mode initiates the fire alarm condition on
the panel and operates the fire alarm sounders, the
Fire output and zone outputs as normal. The Fire
protection output can be configured to operate or
not to operate via DIL switch 1/1. On clearing the
fire condition on a non-latch zone, the panel will
clear the alarm indication if no other fire alarms are
present.
17.6 Configure Intrinsically Safe Zones
Warning: Intrinsically safe zone arrangement.
Ensure that the installation has been carried
out in full accordance with the installation
documentation provided with the I.S. devices
and I.S. barrier. Failure to carry out the
installation correctly is likely to render the
system unsafe and risks causing an
explosion.
End-of-line resistors must be used which
comply with the requirements laid down in
the installation data sheets provided with the
I.S. barrier and the I.S. fire detection devices.
10k resistors are required for the zone
circuits and 3k9 for the sounder circuits.
Zones containing I.S. devices must be
configured as Intrinsically Safe zones to
ensure correct short circuit fault monitoring.
Having selected the DIL switch for configuring the
Intrinsically Safe zones (I.S.) the required zone can
be selected via the Cursor Select feature and can
be programmed as either an I.S. Zone or a
standard zone. If the zone is set as an I.S. Zone,
then the appropriate zone fault LED will be
illuminated.
When configured to the Standard Mode the fire
and fault trip thresholds for the zone are set by the
panel to the optimum normal values and are
compatible with a large range of TYCO detection
devices. This is the factory set condition.
When configured to the Intrinsically Safe Mode
the fire and fault trip thresholds for the zone are set
by the panel to allow fire detection through I.S
barriers (MTL5061/MTL5561 galvanic isolator).
Intrinsically Safe alarm devices [sounders] may be
connected via an MTL5021/MTL5521 galvanic
isolator. There are no requirements for configuring
the panel’s sounder outputs.
Note: Galvanic isolators prevent full fault
monitoring of the sounder circuit due to the low
monitoring voltage (open circuit fault occurs).
Any cable fault between the isolator and I.S.
sounders will not be detected. The 3k9 EOL
resistor must be fitted to the terminals on the
safe side of the barrier.
17.6.1 Mixed I.S. and Non-I.S. Zones
Where the Safety System Documentation
allows, zones can contain I.S. and Non I.S.
devices. The requirements of the Safety
Documentation must be applied and the number
of I.S. devices must be limited to 3 in total.
The I.S. devices must be located at the end of the
zone with the I.S. barrier located in an adjacent
safe area. All of the non-I.S. devices must be
installed in the zone between the barrier and the
panel.
The zone must be configured to the NON-I.S. mode
[This simply sets the operating detection thresholds
and is not a safety issue].
The non-I.S. section [safe side – between the panel
and the I.S. barrier] will support full open and short
circuit fault monitoring and detector/MCP fire event
discrimination. The I.S. section [hazardous side –
between the IS barrier and the end of line resistor]
will support open circuit fault monitoring only - short
circuit fault will initiate a detector fire condition. It
will not support detector/MCP discrimination; all I.S.
devices will raise a detector fire condition.
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