VESDA Accessories Guide
VESDA by Xtralis
4.5 System Relay Module
The system relay module is a 7 relay remote termination card with specialized software. The product software
allows reporting of any alarm or fault condition initiated by any VESDA Address (also called Zones) on the
VESDAnet loop.
Where dedicated VESDA Address (also called Zone) monitoring and management is not required, the system
relay module provides an alternative to the remote termination card and relay processor card module.
Figure 4-8: System Relay Module
4.5.1 Features
l Earliest possible reporting of alarms and faults for all VESDA Addresses (also called Zones) on a
single VESDAnet loop
l Reports on the VESDA Address (also called Zones) on the VESDAnet loop
l 7 programmable relays
l Can be wired to a secondary reporting device (e.g. a sounder or a beacon)
l Option for recessed mounting
l Programmable with Xtralis VSC
l Interfaces with all existing VESDA devices. Refer to Operation of the System Relay Module on page
19 for software versions required to interface with the system relay module.
4.5.2 Operation of the System Relay Module
The system relay module is connected to the VESDAnet loop and always assumes VESDA Address (also
called Zones) 0 for itself. This is the default setting and cannot be changed. It will report on any alarm or fault
condition that occurs with any device on the VESDAnet loop. Further investigation can be conducted using
the Xtralis VSM4 software monitoring package, VESDA Displays, LCD Programmer or through a Fire Alarm
Control Panel.
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