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Raychem-AR-H
58686
-NGC
40
DemoUnit-EN-
1805
SECTION − 7
NGC-
40
-SLIM MODULE, CONFIGURING AND MONITORING
NGC-
40
-SLIM are to be used in areas were compliance to ATEX is mandatory in case of:
• Applications in Zone
1
where the sheath temperature limitations set forth by the T-class can only be met by means of a control limited
design.
• Control limited designs in Zone
2
without the possibility to provide a fail-safe alarm annunciation to a permanently monitored area
A NGC-
40
-SLIM is highly recommended in case of design parameters that could lead to an overheating of the equipment upon control
sensor failure (e.g. heat-up)
7.1 Demo Mode Configuration Process
The NGC-
40
-SLIM modules use temperature data to control an external contactor providing protection against over-temperature of
heating cables. If the measured temperature exceeds the user defined trip setting then the SLIM will open its output relay. If the output is
switched OFF the external contactor isolates the heating cable from the main supply. The unit will remain tripped until it is been manually
reset. Resetting the unit will only be possible after the normal operating conditions have been returned to a safe level. The illustration
below shows the electrical connection between a NGC-
40
-HTC or HTC
3
and a NGC-
40
-SLIM.
The NGC-
40
-SLIM module has three temperature sensor inputs, one form C alarm output, one normally closed relay output used to
control an external contactor and a external switch input use to reset the a tripped SLIM.
