Man-1144 Protection controller Operation manual issue 04
Page 5 of 11
4. Terminal details
4.1 24V IN/24V OUT
These are the power supply terminals. The polarity of these terminals is very important.
The 24V IN is for connection of the power from a previous unit or a power supply and
the 24V OUT is for connection to further units.
Use a minimum cable size of 1.5mm
2
and a maximum length of 100 metres or a
maximum cable size of 2.5mm
2
and a maximum cable length of
160 metres.
Figure 3- Connection of 24V power supply
4.2 DETECTION
These terminals are for the connection of a conventional type 24V smoke detector or
other another detection device such as linear heat detection cable.
A 6K8 end of line monitoring resistor is fitted to these terminals. This must be removed
and place across the end of the detection circuit wiring to provide open circuit monitoring
for the detection cable.
Note: automatic smoke detectors are polarity sensitive so polarity should be observed. If
a short circuit take place over the detection line (either by linear heat detector activation
or smoke detector activation [470 Ohms] or by accident), then the panel will
immediately proceed to activation
Figure 4- Connection to linear heat detection cable
+ - + -
24V in 24V out Detection
6K8
6K8 END OF LINE
MONITORING RESISTOR
LINEAR HEAT
DETECTION CABLE
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