6
7.1 Power Supply Unit
Natron WE-C is powered only from an external power supply unit 24V DC. The power supply
terminals are connected to ±PW terminals of Natron WE-C as observing the polarity.
Natron WE-C is equipped with a special input “Inp” for Fault monitoring of the external power
supply unit. This option can be used when the external power supply unit has a special Fault
output for monitoring. According the type of the Fault output (open collector or energized) of the
external power supply unit, there are two types of connection diagrams for monitoring.
Open Collector
Diagram
When the Fault
output of the
external power
supply unit is
open collector
type, short-circuit
the “3V” output
and “Inp” input
terminals, and then
connect the Fault
Output of the
power supply unit.
Energized Fault
Output Diagram
When the Fault
output of the
external power
supply unit is
energized fault
output type,
connect it directly
to “Inp” input
terminal of the
module.
In case of power supply fault event, the conventional control panel will indicate FAULT in the zone
line to which the Natron WE-C is connected.
7.2 Conventional Zone Line
ATTENTION: Natron WE-C wireless module MUST BE POSITIONED
ALWAYS AT THE END of the conventional zone line!
It is not allowed to connect the module at the begging or in the middle of
the zone line, because that will disturb the correct operation of the fire
alarm system and is not in compliance with the requirement of EN 54!
The module must be the last or
the only device connected to
the conventional zone line!
The end of conventional zone
line is connected to zone input
terminals of the module with
strictly observing the polarity.
The zone line EOL resistor must
be fitted to zone output terminals
of the module to provide correct
supervision for alarm and fault
events in the zone line.
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