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FIREFINDER SERIES II
INSTALLATION,
COMMISSIONING
&
OPERATION
11.15 Occupant Warning Systems
The EV20, EV40, EV60 and EV120 are compact single zone occupant warning devices that when
triggered produce
Alert
and
Evacuation
signals to meet the requirements of AS1670.1.
EV20
At the heart of an EV20 single zone occupant warning system is a microprocessor that generates the
alert and evacuation signals, controls timing and the input / output.
If an FACP warning system input is received when the rotary switch is in the AUTO position the
EV20 will begin to output the “Alert” signal for a duration determined by the setting of the 4 way DIL
switch SW1. The set duration is termed the changeover timeout and ranges from 0 seconds to a
maximum of 300 seconds. If the time out is set to 0 seconds then the alert signal is bypassed and
the evacuation signal commences immediately. The operator can manually stop the sequence by
turning the rotary switch to the ISOLATE position.
IC4 performs the task of an audio amplifier with TX1 providing the impedance matching to a 100 volt
speaker line. The alert and evacuation signal output Stages are set by adjusting RV1 and RV2
respectively.
Short or open circuit speaker faults are detected by the fault monitoring circuitry and will result in the
illumination of the FAULT indicator mounted on the front panel control module.
Public Address
A microphone and pre-amplifier (Order Code 222-0007) is used to provide the public address
capabilities.
EV20 Verbal EVAC only Messaging
An optional verbal messaging PCB (Order Code 222-0026) is available and is mounted directly onto
the main board.
EV40
At the heart of an EV40 single zone occupant warning system is a microprocessor that generates the
alert and evacuation signals, controls timing and the input / output.
If an FACP warning system input is received when the rotary switch is in the AUTO position the
EV40 will begin to output the
“Alert” signal for a duration determined by the setting of the 4 way DIL
switch. The set duration is termed the changeover timeout and ranges from 0 seconds to a
maximum of 540 seconds. If the time out is set to 0 seconds then the alert signal is bypassed and
the evacuation signal commences immediately. The operator can manually stop the signal sequence
by turning the rotary switch to the ISOLATE position.
The Amplifier provides 40watts of audio output at 8 ohms which feeds TX1 to provide the impedance
matching to a 100 volt speaker line. The
“ALERT” and “EVAC” Stage controls adjust the output
Stage of each set of signals.
Short or open circuit speaker faults are detected by the fault monitoring circuitry and will result in the
illumination of the FAULT indicator mounted on the front panel control module and
“SPEAKER
SHORT” (red) or “SPEAKER OPEN” (yellow) LED’s on the main board.
Public Address
A microphone (Order Code 294-0001) is used to provide the public address capabilities.
EV40 Verbal Messaging
An optional verbal messaging PCB (Order Code 222-0013) is available and is mounted directly onto
the main board.
EV20 / 40 Verbal Message
Standard message for Alert / Evacuation
– “
Emergency
Evacuate Now
”
