VESDA by Xtralis
VESDA Accessories Guide
4 The Modules
4.1 The Display Module
The display module reports smoke levels and alarm stages for the assigned detector. It has buttons to enable
various systems functions. The display module also indicates faults with the detector and VESDAnet.
4.1.1 Features of the Display Module
The display module features:
l Immediate status reporting for assigned VESDA Address (also called Zones)
l High intensity alarm LEDs
l Remote relay option
l 20 segment vertical bar graph display
l Alarm threshold indicators
l In built sounder for audible warning
l Comprehensive fault reporting
l Multi-mode numeric Display
4.1.2 Operation of the Display Module
A display module can be installed directly onto a detector, or at a remote location on a remote box or the 19”
Subrack. A display module is assigned to only one detector, however up to 19 display modules can be
assigned to one detector. The display module is connected to the detector through the termination card.
l LEDs and Buttons
The Threshold Indicators provide at a glance the visual representation of the programmable alarm
thresholds.
The Bar Graph continuously displays the current level of detected smoke. The top segment indicates FIRE 1
smoke threshold level.
The Numeric Display has a two digit readout of:
l FIRE 1 threshold
l Current smoke levels (in % obs/m OR % obs/ft)
l The VESDA Address (also called Zones) number
l First Alarm Sector (VLS only).
The Alarm LEDs indicate the respective thresholds set for ALERT, ACTION, FIRE 1 and FIRE 2 have been
reached if an smoke is detected.
The Fault LEDs indicate a fault with the assigned detector or with VESDAnet.
Push Button Keys enable the user to Reset, Isolate or Silence the detector and control the mode of the
display module. These buttons can be disabled by the Systems Administrator to prevent operation of its
functions.
Each detector in the laser series has a display module specifically designed to meet the reporting functions of
a particular detector model. The reporting functions of these display modules have been discussed in detail in
the respective detector guides.
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