Bosch EVAX25E User Manual

Fire Alarm Systems | Bosch Voice Evacuation Systems

Bosch Voice Evacuation Systems

Digitally‑recorded automatic evacuation message (up

▶

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

▶

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 (batteries

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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.

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)

•

120 VAC power transformer and battery charger

•

Tone generator

•

Paging microphone

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Surface‑mount or semi‑flush‑mount enclosure with a

•

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.

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

•

120 VAC power transformer and battery charger

•

Tone generator

•

Paging microphone

•

Standard‑size enclosure with a hinged, key‑locked door

•

The EVAX150E and EVAX200E expander panels provide the
same features with additional power in a double‑size
enclosure housing two amplifier modules.

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2 | Bosch Voice Evacuation Systems

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

•

Power regulator and battery charger

•

Tone generator

•

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 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

•

amplifier outputs
The EVX‑4Z has four Class B zones. The EVX‑2ZA has two
Class A zones.

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

•

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.
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),
12‑second delay, 16‑second delay, 20‑second delay,
24‑second delay, or 28‑second delay. The chosen tone
sounds during the delay.
Set the delay between repeats of the message for a

•

4‑second delay, 8‑-second delay, 12‑second delay
(default), or 16‑second delay.
Indicate if the message plays or not. Message on is the

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default.
Set the number of times the message plays to one play,

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two plays, three plays (default), or continuous play.

Certifications and Approvals

Region Certification

USA UL UOXX: Control Unit Accessories, System

(UL864), UOXX2: Control Unit
Accessories, System - Component
(UL864)

CSFM 6911-1615: 101, 6911-1615: 102,

6911-1615: 103, and 6911-1615: 104

Installation/Configuration Notes

Compatible Products

The following products are compatible with the Bosch Voice
Evacuation Systems:

Bosch Voice Evacuation Systems | 3

Category Product

Expansion
Modules

Remote
Microphones

Zone
Splitters

Speaker Placement

Choose speakers that deliver a minimum ambient sound of
15 dB above the normal ambient noise level. In
high‑ambient 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

•

corridors similar to the layout of conventional fire
horns.
Ensure that all occupied locations are within 50 ft

•

(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.

EVX‑25 25 W Amplifier with DMR and microphone

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

EVX‑RM Charcoal‑gray Remote Microphone Panel

EVX‑RMR Red Remote Microphone Panel

EVX‑2ZA Class A Zone Splitter

EVX‑4Z Class B Zone Splitter

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)

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.

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)

Technical Specifications

Environmental Considerations

Relative Humidity: Up to 95%, non condensing

Temperature (Operating): +32°F to +120°F (0°C to +49°C)

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