PAGE - 9 Installation and operating manual UDS-3
NOTIFIER ITALIA Doc. M-205.1-UDS3N-ENG Rev A.1 UDS-3_manu
DESCRIPTION OF OUTPUTS ASSIGNED TO EACH UDS-3
EXTINGUISHING ZONE
PRE-ALARM DEVICE OUTPUT
Controlled output with a 2,7K-1/4W End-Of-Line resistor.
This output can be used to drive other devices of the extinguishing system, and it’s activated by a pre-alarm
signal. Being controlled, it’s particularly suitable for optical warning devices connections or for
optical/acoustic devices connection.
This output is activated during “pre-activated” condition, arisen by terminal board input or loop, and always
remains active. When UDS-3 goes back to standby condition this output switches off. This output can be
excluded.
N.B.: When pre-alarm output is activated polarity is inverted on the corresponding terminals.
SOUNDER OUTPUT
This is an output controlled by an End-Of-Line 2,7K-1/4W resistor.
Sounder’s acoustic signal is determined by extinguishing cycle phase.
These phases are determined by states in which UDS-3 is.
1. stand-by state: sounder OFF
2. pre-discharge state warning: sounder pulsing 0,5 sec ON - 0,5 sec OFF
3. active emergency delay state warning: sounder pulsing 1 sec ON - 0,5 sec OFF
4. release in progress status: sounder ON
Furthermore, sounder output can have the following functions:
1. Sounder output exclusion: sounder output can be excluded only if before actuators outputs are
excluded, in this case extinguishing output.
2. Sounder silencing: sounder output can be silenced when it is in “always on” status, that is
when UDS-3 is in “release condition” for that zone.
3. Evacuation: sounder output can be activated manually with continuous signal, to indicate an
evacuation of the zone, only if UDS-3 is in “standby” condition. Consequently in that situation
sounders can also be silenced. In case of evacuation command with alarm input activation,
sounder signals which phase is in progress.
N.B. When sounder output is active, polarity is inverted on the corresponding terminals.
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