Chapter 2 - Overview And Features; Section 2-1- Description; Section 2-2 - Enclosure And Configuration; Section 2-3 - Nominal Electrical Data - Wheelock SAFEPATH4 Application, Installation, Operation, And Maintenance Manual

Chapter 2 - Overview and Features

Section 2-1- Description

General
The SAFEPATH4 AUDIO BOOSTER panel provides additional or remote amplification for
Wheelock, Inc. Voice Evacuation panels. It is designed to boost the capacity of the SP40/2 panel
by increasing the output wattage of the 25V or 70.7V audio output. There are two models of the
audio booster. Model SPB-80/4 contains an 80 Watt, 25V or 70.7V, supervised audio output with
two supervised and synchronized selectable 2 Amp strobe outputs. Model SPB-160 contains 160
Watt amplifier section with two 80 watt outputs each of 25V or 70.7V selectable supervised audio
outputs. The SPB-160 does not contain strobe NAC circuits. Figures 2-1 and 2-2 on Page 15
illustrate the basic capabilities.
NOTE: Input and Output audio must be the same throughout the entire system. If 25V is
selected as the input voltage, then 25V must be selected as the output voltage for the entire
system. If 70.7V is selected as the input voltage, then 70.7V must be selected as the output
voltage for the entire system.
The voice evacuation panel and the audio booster panel do not sense an emergency condition or
hazards such as fire; it is only a part of a system that does sense such conditions. The panel,
when activated by a voice evacuation panel, provides an amplified audio output from the voice
evacuation panel to speaker notification appliances. When used as part of a protective signaling
system, the voice evacuation panel must be properly connected to a compatible control panel that
has been approved by a nationally recognized testing laboratory ("LISTED") and to LISTED
compatible notification appliances for proper operation.
THE SAFEPATH4 AUDIO BOOSTER PANEL MUST BE PROPERLY INSTALLED AND
CONNECTED TO A PROPERLY INSTALLED SP40/2 VOICE EVACUATION PANEL IN
ORDER TO FUNCTION IN A VOICE EVACUATION SYSTEM.

Section 2-2 - Enclosure and Configuration

See Chapter 8 for Technical Specifications

Section 2-3 - Nominal Electrical Data

See Chapter 8 for Technical Specifications.

Section 2-4 - Operation Modes

Standby Mode
Standby is the normal mode. The panel supervises the connections and internal components to
maintain proper operation. All speaker appliances are off. If AC power is lost, the panel goes into
a sleep or reduced power mode to conserve battery power.
Alarm Mode
Alarm mode occurs when an emergency signal is initiated by the voice evacuation system
through an FACP or control equipment.
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