The 300 series Zone Display Unit is a transparent module directly connected to the Control Panel and requires no external power supply. The
ZDU works with all of the 300 series detectors. When a detector goes into Alarm the ZDU responds to the current absorped by disconnecting the
line to the Control Panel. The ZDU behaves like a detector in Alarm so that the Control Panel continues to warn of the Alarm and communicates
with the detectors in order to obtain the addresses of those detectors in Alarm.
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MINIMUM NOMINAL MAXIMUM UNITS COMMENTS
Supply voltage 15 24 31 VDC
Standby current --- 80 100 mA Does not include detector current
Series resistor 270 330 680 W External series resistor value has to be
added to the internal one (if present).
Output impedance --- --- 1 W Does not include series resistor
Reset time --- --- 0.3 S Alarm condition
Reset time --- --- 1 S Normal condition (@24V, isolated line)
Mechanical Specifications
MINIMUM NOMINAL MAXIMUM UNITS COMMENTS
Height --- --- 40 mm
Length --- --- 132 mm
Diameter --- --- 137 mm
Weight --- --- 170 g
Cable entry area --- --- 750 mm² Circular knock out on the box back side