Ampac SP Series, Installation, Commissioning & Operation

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FireFinder
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Installation Commissioning & Operation
Page 62
11 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 AS1670.4.
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 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.
Amplifier 1 & 2 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) LEDs 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
Alert / Evacuation – “ Emergency Evacuate Now ”