Bosch EVX-25EM, EVX-25E, EVX-2ZA, EVX-25, EVX-100EM Specsheet
Fire Alarm Systems | Bosch Voice Evacuation Systems
Bosch Voice Evacuation Systems
Digitally-recorded automatic evacuation message (up
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to 4 minutes of message capacity)
Alarm and alert signals
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Live microphone override of message and tone
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Compatible with 12 V or 24 V, analog‑addressable or
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microprocessor-based fire alarm control panels
(FACPs)
Clean dead-front construction
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Easy installation and operation
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24-hour backup with 7 Ah batteries installed
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(batteries not supplied)
The Bosch Voice Evacuation systems and expansion
panels provide a variety of options that can be easily
added to an existing fire alarm control panel system for
area of assembly applications and for high-rise voice
evacuation not requiring firemens' phones. Choose up
to 2000 W of audio amplifier power to meet your speaker
power requirements. You can supervise multiple zones
through your choice of zone splitters.
Functions
Digital Message Repeater
Each of the Bosch voice evacuation systems (EVAX25,
EVAX50, EVAX100, EVAX150, and EVAX200) includes a
digital message repeater (DMR). The systems come with
the following standard 15-second message
programmed:
"Attention, please. There has been a report of an
emergency. Proceed calmly to the nearest exit and leave
the building immediately. Do not use the elevators; use
stairwells where necessary. All handicapped occupants
shall use the building evacuation plan."
The voice evacuation message is broadcast until the
FACP resets or until emergency personnel interrupt the
broadcast with a manual page. When the FACP resets,
the voice evacuation system automatically returns to
normal operating condition.
The closure of a contact from either the FACP or from
any normally-open contact device can cause the
broadcast of a chime tone followed by the message "All
clear."
Optional primary and secondary messages are available.
For further information, refer to the Bosch Voice
Evacuation System's Optional Messages Technical Service
Note (P/N: F01U500869).
Remote Paging Microphones
Remote paging microphones (up to five per EVX-SC
supervisory card) are supported through a supervised
circuit. Remote microphones may be mounted up to
5000 ft (1.5 km) away from the EVAX voice evacuation
panel. An ideal use for a remote microphone is when the
FACP and voice evacuation system panels are in an
electrical room and you need a microphone in the lobby.
System Settings
Control system operation by DIP switch settings:
Configure three DIP switches to determine alert tones
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of Temporal Slow Whoop (default), Hi Lo, Horn, Bell,
or 1 kHz.
Turn the Diagnostic Mode on or off (default).
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Set the AC Power Failure Report for no delay (default)
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or for a six-hour delay.
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2 | Bosch Voice Evacuation Systems
Indicate if batteries are connected to the system. The
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default setting is batteries are connected.
Indicate if a microphone is connected to the system.
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The default setting is a microphone is connected.
Set the initial delay before a message starts for no
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delay, 4-second delay, 8-second delay (default), 12second delay, 16-second delay, 20-second delay, 24second delay, or 28-second delay. The chosen tone
sounds during the delay.
Set the delay between repeats of the message for a
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4-second delay, 8-second delay, 12-second delay
(default), or 16-second delay.
Indicate if the message plays or not. Message on is
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the default.
Set the number of times the message plays to one
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play, two plays, three plays (default), or continuous
play.
System Overview
BOSCH Voice Evacuation Systems
All Bosch voice evacuation systems include all the
necessary features to provide an effective voice
evacuation system:
Audio amplifier
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Digital message repeater (DMR)
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120 VAC power transformer and battery charger
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Tone generator
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Paging microphone
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Surface-mount or semi-flush-mount enclosure with a
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hinged, key-locked door in charcoal-gray (standard)
or red (optional)
The EVAX25, EVAX50, and EVAX100 respectively provide
25 W, 50 W, and 100 W of audio amplifier power in a
standard-size enclosure. The EVAX150 has one 50 W
audio amplifier and one 100 W audio amplifier in a
double-size enclosure. The EVAX200 has two 100 W
amplifiers in a double-size enclosure.
Customize these systems to satisfy most application
requirements by adding expander panels, expander
modules, or zone splitters. Expanders can be grouped
together in any combination to provide up to 2000 W of
audio power.
Tone generator
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Paging microphone
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Standard-size enclosure with a hinged, key-locked
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door
The EVAX150E and EVAX200E expander panels provide
the same features with additional power in a double-size
enclosure housing two amplifier modules.
Use the EVAX25EM, EVAX50EM, or EVAX100EM
expander panel when a 25 W, 50 W, or 100 W audio
expander is needed with its own enclosure. Use the
EVAX150EM and EVAX200EM for expansion when
greater power is required in the larger enclosure
configuration. The EM models have all the features of the
E models except they are without a paging microphone.
Optional Expander Modules
The expander modules (EVX- models) can increase the
capacity of any Bosch voice evacuation system or
expander panel. They do not have paging microphones
and are intended for installation in UL Listed enclosures
(not supplied). Features of these modules:
Audio amplifier
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Power regulator and battery charger
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Tone generator
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Optional Zone Splitters
The EVX-4Z and EVX-2ZA zone splitters allow the
supervised output of any Bosch audio amplifier to
supervise multiple zones. Features of these zone
splitters:
Manual selection of any or all voice evacuation zones
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for emergency paging
Automatic selection of voice evacuation zones by
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connecting normally-open contacts from the FACP or
other auxiliary control system
Annunciation of either active or faulted zone status by
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individual LEDs
Compatibility with jumper-selectable 25 V and 70 V
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amplifier outputs
The EVX-4Z has four Class B zones. The EVX-2ZA has two
Class A zones.
Certifications and Approvals
Optional Expander Panels
The Bosch system expander panels provide an easy and
cost-effective way to increase the output power of a
Bosch voice evacuation system. They can also provide a
manually-activated emergency paging panel for
buildings. Features of the EVAX25E, EVAX50E, and
EVAX100E:
Audio amplifier
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120 VAC power transformer and battery charger
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Listings and
Approvals:
EVAX-25 CSFM 6911-1615: 101
EVAX-50 and 50E CSFM 6911-1615: 103
EVAX-100 and 100E CSFM 6911-1615: 104
EVX-2ZA and EVX-4Z CSFM 6912-1615: 102
UL UOXX and UOXX2: Control Unit Accessories,
System (UL864)
Bosch Voice Evacuation Systems | 3
Installation/Configuration Notes
Compatible Products
The following products are compatible with the Bosch
Voice Evacuation Systems:
Category Product
Expansion EVX-25 25 W Amplifier with DMR and microphone
Modules EVX-25E 25 W Amplifier without DMR, with microphone
EVX-25EM 25 W Amplifier without DMR and microphone
EVX-50 50 W Amplifier with DMR and microphone
EVX-50E 50 W Amplifier without DMR, with microphone
EVX-50EM 50 W Amplifier without DMR and microphone
EVX-100 100 W Amplifier with DMR and microphone
EVX-100E 100 W Amplifier without DMR, with microphone
EVX-100EM 100 W Amplifier without DMR and microphone
Remote EVX-RM Charcoal-gray Remote Microphone Panel
Microphone EVX-RMR Red Remote Microphone Panel
Zone EVX-2ZA Class A Zone Splitter
Splitters EVX-4Z Class B Zone Splitter
Speaker Placement
Choose speakers that deliver a minimum ambient sound
of 15 dB above the normal ambient noise level. In highambient noise areas, speakers should be tapped at
15 dB to 21 dB above the ambient noise level and placed
closer to one another to ensure that voice messages are
intelligible.
The best way to determine speaker placement needs is
to conduct a site survey with a decibel meter to measure
ambient noise levels; however, some general rules for
speaker placement are:
Locate speakers at all pull stations and in main
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corridors similar to the layout of conventional fire
horns.
Ensure that all occupied locations are within 50 ft
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(15 m) of a speaker. Place additional speakers in
rooms such as cafeterias and computer rooms. Be
sure there are speakers in isolated areas where
service personnel might be working.
For ceiling-mount speakers, use 2 W of speaker power
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for every 2000 ft2 (186 m2) of area covered in open
areas and 2 W for every 1500 ft2 (139 m2) in divided
areas. For wall-mount speakers, use 1 W of speaker
power for every 2000 ft2 (186 m2) of area covered in
open areas and 1 W for every 1500 ft2 (139 m2) in
divided areas.
Speaker Power Requirements
System power (total wattage) must be sufficient to
supply the power required by all of the speakers on the
system. Speaker transformers can often be tapped for
different wattages (usually, ¼ W, ½ W, 1 W, etc.). A
system rated at 25 W of audio power can power a
speaker load of 25 W. This can be made up of 25
speakers each tapped at 1 W, 50 speakers each tapped
at ½ W, or any mathematical combination that is less
than or equal to 25 W.
Speaker Wiring Requirements
The 25 V speaker circuits of most voice evacuation
systems are classified as power-limited wiring and can
be run with other fire alarm wiring without ill effects. No
special cabling is required. Standard power-limited fire
alarm cable (FPL) is sufficient for most applications;
however, certain addressable systems can generate
extraneous noise from their addressable loop. Because
these addressable systems cannot use shielded cable,
shielding of the evacuation speaker circuit helps to
eliminate noise picked up and heard in the speakers.
When using 70 V circuits, separate them as described in
the National Electrical Code.
Generally, 18 AWG (1.0 mm) wire is adequate for
speakers. Heavier wire is needed if loads are high or the
runs are long. The following table indicates typical wire
lengths for specific wire sizes and speaker loads. It
assumes that there is an even distribution of speaker
load and that a 20% drop at the last device is allowable.
25 VRMS Output:
Power 18 AWG
(1.0 mm)
10 W 1900 ft
(579 m)
15 W 1280 ft
(390 m)
25 W 760 ft
(232 m)
70 VRMS Output:
Power 18 AWG
(1.0 mm)
10 W 15200 ft
(4633 m)
15 W 10130 ft
(3088 m)
25 W 6080 ft
(1853 m)
16 AWG
(1.3 mm)
3050 ft
(930 m)
2030 ft
(619 m)
1220 ft
(372 m)
16 AWG
(1.3 mm)
24200 ft
(7376 m)
16130 ft
(4916 m)
9680 ft
(2950 m)
14 AWG
(1.6 mm)
4850 ft
(1478 m)
3230 ft
(985 m)
1930 ft
(588 m)
14 AWG
(1.6 mm)
38360 ft
(11692 m)
25570 ft
(7794 m)
15340 ft
(4676 m)
12 AWG
(2.0 mm)
7700 ft
(2347 m)
5140 ft
(1567 m)
3080 ft
(939 m)
12 AWG
(2.0 mm)
61100 ft
(18623 m)
40730 ft
(12415 m)
24440 ft
(7449 m)
System Power Requirements
All Bosch voice evacuation systems require 120 VAC
connected to the system's power transformer. Standby
power is supplied, in case of AC power failure, by
standby batteries (not supplied). The EVAX25, EVAX50,
and EVAX100 require two 12 VDC, 7 Ah standby
batteries. The EVAX150 and EVAX200 require four
12 VDC, 7 Ah standby batteries.
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