VESDA -E VES-A00-P Product Manual page 43

4.3.6 Relays
The relays, located on the main processor card, interface to the Fire Alarm Control Panel (FACP) to
communicate faults, alarms and disabled states. The relays can be programmed using Xtralis VSC. Relays 3
and 6 are permanently set for Urgent Fault and Fire 1 respectively. Table 4-22 below illustrates the default
assignments of functions (conditions) to relays and summarizes the default behavior of each relay. Section
5.5.12 describes how to configure the relay behavior using Xtralis VSC. It is possible to assign more than one
condition to a relay.
Fire 1 Relay
If a detector relay is to be used to signal fire alarm to the Fire Alarm Control Panel (FACP) then the Fire 1 relay
must be used.
Urgent Fault and Fire 1 Relay Terminals
The Urgent Fault relay is energized during normal operation while the Fire 1 relay is only energized when a Fire
1 is detected. The operation of these two relays is summarized in the following table.
URGENT FAULT Relay
No Fault
(Energized)
Relay Assignments and Behaviour
Relays 1, 2, 4, 5, 7, 8, 9, 10, 11, 12 are fully configurable.
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Relays 3 and 6 are fixed to Urgent Fault and Fire 1 respectively. These relays may be assigned additional
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conditions.
Relays 3 and 6 are changeover relays. (SPDT (1 Form C)) All the other relays are single pole single throw
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(SPST-NO (1 Form A)).
Relay # Default
Assignment
1 Disable
(Isolate) and
Standby
2 Minor Fault
3 Urgent Fault
4 Alert
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Table 4-1: Urgent Fault and Fire Relay Operation
Fault
or unpowered state
Table 4-2: Default Relay Assignments
Default to Description for default configuration
Normally
Energized
No Energizes when an operator disables
(isolates) the detector. Also energizes when
the operator puts the detector into Standby
mode.
Yes De-energizes when a Minor Fault is
detected.
Yes De-energizes when an Urgent Fault is
detected.
Note that Relay 3 is fixed Normally
Energized in order to ensure that a fault will
be signaled when power to the VES-A00-P
is removed. See Table 4-1.
No Energizes when the Alert alarm is initiated.
VESDA-E VES-A00-P Product Guide
Fire 1 Relay
No Fire
(De-energized)
Fire
Configurability
Fully
configurable
Fully
configurable
Urgent Fault
cannot be
removed. Other
conditions can
be added.
Fixed Normally
Energized
Fully
configurable
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