Wheelock SAFEPATH4 SP40/2 Owner's manual

SAFEPATH4
AUDIO BOOSTER
SPB-80/4 P/N 108988
SPB-160 P/N 108989
SPB-160/B P/N 109930
SPB-80/4-B P/N 109931
Installation, Testing,
Operation, and Maintenance
Manual
273 Branchport Avenue, Long Branch, NJ 07740-6899 Ph: [phone] Fax: [phone]
Toll Free 800-631-2148 Web Site: www.wheelockinc.com E-Mail: in[email protected]
Part Number P84296 Revision P Assembly Number A84347 Revision B

2
Intentionally Blank

3
Typographical Notation Conventions
Thank you for using our products. Use this product according to this instruction manual. Please
keep this instruction manual for future reference.
ANY MATERIAL EXTRAPOLATED FROM THIS DOCUMENT OR FROM WHEELOCK
MANUALS OR OTHER DOCUMENTS DESCRIBING THE PRODUCT FOR USE IN
PROMOTIONAL OR ADVERTISING CLAIMS, OR FOR ANY OTHER USE, INCLUDING
DESCRIPTION OF THE PRODUCT'S APPLICATION, OPERATION, INSTALLATION AND
TESTING IS USED AT THE SOLE RISK OF THE USER AND WHEELOCK WILL NOT HAVE
ANY LIABILITY FOR SUCH USE.
Certain information contained in this manual has been extracted from the NFPA 72 Manual (1999
Edition) and the Life Safety Code 101™ Manual (2000 Edition).
Notation Conventions
This manual uses the following notation conventions:
WARNING: INDICATES A POTENTIALLY HAZARDOUS SITUATION THAT, IF NOT
AVOIDED, COULD RESULT IN PROPERTY DAMAGE AND SERIOUS PERSONAL INJURY
OR DEATH TO YOU AND OR OTHERS.
CAUTION: Indicates a potentially hazardous situation that, if not avoided, could result in
minor or moderate injury. It may also be used to alert against unsafe practices.
Copyright 2005 Wheelock, Inc. All rights reserved.

4
Intentionally Blank

5
Table of Contents
Typographical Notation Conventions………………………………………………………..…… 3
Table of Contents……………………………………………………………………………..……. 5
List of Figures………………………………………………………………………………..………7
List of Tables………………………………………………………………………………..………. 8
Chapter 1 – Safety Precautions……………………………………………………………..……. 9
Section 1-1 – Read This Manual…………………………………………………..………. 9
Section 1-2 – Operational Safety……………………………………………………..…… 9
Section 1-3 – Compliance with Applicable Codes, Regulations, Laws, Standards,
And Guidelines……………………………………………………………. 10
Section 1-4 – Property Insurance Recommendation………………………………….. 10
Section 1-5 – Audio Output Considerations……………………………………………. 10
Section 1-6 – RF Interference…………………………………………………………… 11
Section 1-7 – General…………………………………………………………………….. 11
Chapter 2 – Overview and Features……………………………………………………………. 13
Section 2-1 – Description…………………………………………………………………. 13
Section 2-2 – Enclosure and Configuration…………………………………………….. 13
Section 2-3 – Nominal Electrical Data………………………………………………….. 13
Section 2-4 – Operation Modes…………………………………………………………. 13
Chapter 3 – Installation and Setup……………………………………………………………… 19
Section 3-1 – Introduction………………………………………………………………… 19
Section 3-2 – Two Wire and Four Wire Audio Modes………………………..……….. 19
Section 3-3 – General Installation Instructions………………………………………… 22
Section 3-4 – Panel Wiring………………………..……………………………………… 30
Section 3-5 – Mounting…………………………………………………………………… 34
Section 3-6 – System Checkout…………………………………………………………. 35
Section 3-7 – Ground Fault Detection ………………………………………………….. 38
Section 3-8 – Battery Care and Backup Battery Calculations………………………... 38
Section 3-9 – AC Power and Battery Installation Procedures…………………...…… 40
Chapter 4 – Operation…………………………………………………………………………… 42
Section 4-1 – Introduction……………………………………………………………….. 42
Section 4-2 – Supervision……………………………………………………………….. 42
Section 4-3 – Actions That Initiate Alarms…………………………………………….. 43
Chapter 5 – Operational Procedures………………………………………………………….. 44
Section 5-1 – Operator Instructions……………………………………………………… 44
Chapter 6 – Periodic Testing and Maintenance………………………………………………. 46
Section 6-1 – Introduction………………………………………………………………… 46

6
Section 6-2 – Periodic Testing……………………………………………………………...46
Section 6-3 – Faulty Equipment…………………………………………………………….46
Section 6-4 – Qualified Personnel………………………………………………………….46
Section 6-5 – Miscellaneous Hardware Testing…………………………………………. 47
Chapter 7 – Troubleshooting……………………………………………………………………….48
Section 7-1 – Introduction………………………………………………….………………. 48
Section 7-2 – Troubleshooting………………………………….……………..……………48
Section 7-3 – Audio Booster Wiring Diagram..……………….……………..…………… 56
Chapter 8 – Technical Data…………………………………………………….…………………. 57
Section 8-1 – Mechanical……………………………………………………….………….. 57
Section 8-2 – Environmental……………………………………………………………….. 57
Section 8-3 – Electrical……………………………………………………………………... 57
Chapter 9 – Module Descriptions…………………………………………………….……………59
Section 9-1 – Introduction………………………………………………..………………….59
Section 9-2 – Audio Booster Audio Booster PC Board ….………………………..……. 59
Section 9-3 – 24VDC Power Supply (SAPS)……………………….……………………. 60
Chapter 10 – Warranty……………………………………….……………………………………..61
Chapter 11 – Battery Backup Calculation Work Sheet………………………………..…………63
Appendix E - Compatible Appliances……………..…………………………………….See Attachment

7
List of Figures
Figure 2-1 Basic Capabilities of the SPB-80/4 SAFEPATH4 Audio Booster Panel……….… 15
Figure 2-2 Basic Capabilities of the SPB-160/4 SAFEPATH4 Audio Booster Panel…….…. 15
Figure 2-3 Layout of a SPB-80/4 SAFEPATH4 Audio Booster Panel………....…………....... 16
Figure 2-4 Layout of a SPB-160 SAFEPATH Audio Booster Panel………………………..…. 17
Figure 3-1 Connections for Multiple Audio Booster in Two-Wire Mode (SPB-160)………..….. 20
Figure 3-2 Connections for Multiple Audio Booster in Two-Wire Mode (SPB-80/4)…………… 21
Figure 3-3A Location of Field Wire Connections (SPB-160)………………………………….…… 23
Figure 3-3B Location of Field Wire Connections (SPB-80/4)…………………………………...… 24
Figure 3-4 Removable Terminal Block……………………………………………………….….…. 26
Figure 3-5 Power Limited and Non-Power Limited Wiring………………………………….….…. 26
Figure 3-6 Audio and Auxiliary Connections (SPB-160 and SPB-80/4)……………………...…. 27
Figure 3-7 Strobe Input Connections (SPB-80/4)……………………………………………….…. 27
Figure 3-8 Audio and Strobe Output Connections (SPB-80/4)……..……………………….…… 28
Figure 3-9 Audio Output Connections (SPB-160)……..…………………………………….…… 28
Figure 3-10 Alarm and Trouble Connections (SPB-160 and SPB-80/4)…………………….…… 29
Figure 3-11 Power and Battery Connections…………………………………………………..……. 29
Figure 3-12 Wiring Diagram - Visual Only Notification Appliances (SPB-80/4)………………..… 32
Figure 3-13 Wiring Diagram - Combination Audio/Visual Notification Appliances (SPB-80/4)… 32
Figure 3-14 Wiring Diagram - Audio Only Notification Appliance Output……….….…………..... 32
Figure 3-15 Trouble Status Relay Contacts……………….…………..….………..……….….…… 33
Figure 3-16 Input Power Connection Location on the SAPS Power Supply…………..…..….… 33
Figure 3-17 DC and Battery Connection on the Audio Booster PC Board………..…………...… 34
Figure 3-18 SAFEPATH4 Audio Booster Panel Mounting and Grounding Location.…………. 35
Figure 3-19A Jumper/Switch/Variable Resistor Location on SPB-160…….….……………..…….. 36
Figure 3-19B Jumper/Switch/Variable Resistor Location on SPB-80/4…….….…………...…….... 36
Figure 7-1A SPB-160 LED Locations….………………………….………………………………..…. 49
Figure 7-1B SPB-80/4 LED Locations……….…………………………………....………………….. 50
Figure 7-2 Audio Booster Wiring Diagram….…………………………………....……………..….. 56
Figure 9-1A SPB-80/4 PC Board…………………………………………………………………….… 59
Figure 9-1B SPB-160 PC Board…………………………………………………………………….… 60
Figure 9-2 24VDC Power Supply Module (SAPS)…………………………………………………. 60

8
List of Tables
Table 2-1 Standard Features……………………………………………………………………. 14
Table 3-1 Terminal Connection Definitions……………….…………….……………………… 25
Table 3-2 Jumper/Switch/Variable Resistor Functions…………………………………………37
Table 6-1 Miscellaneous Hardware Tests………………………………………..……………. 47
Table 7-1 Trouble LED Procedure Cross Reference……………………………………..…… 51
Table 8-1 Mechanical………………………………………………………………………………57
Table 8-2 Environmental………………………………………………………………………….. 57
Table 8-3 Electrical…………………………………………………………………………………57
Table 8-4 Outputs…………………………………………………………………………………. 58
Table 8-5 Wiring Connections…………………………………………………………………… 58
Table 8-6 End of Line Resistor (EOLR)………………………………………………………… 58

9
Chapter 1 - Safety Precautions
Section 1-1 - Read This Manual
Personnel properly qualified in the application and use of life safety equipment ("qualified personnel")
shall read this manual carefully before performing any actions to specify, apply, install, maintain and
operationally test SAFEPATH4 Audio Booster products in accordance with the instructions in this
manual.
This manual shall be kept with the SAFEPATH4 Audio Booster panel for reference during the life of
the system. This manual shall be made available to all qualified personnel who operate, test, maintain,
or service SAFEPATH4 Audio Booster products. It is strongly recommend that such personnel read
and understand the entire manual.
Section 1-2 - Operational Safety
WARNING: IF SAFETY PRECAUTIONS, INSTALLATION AND TESTING INSTRUCTIONS ARE
NOT PERFORMED PROPERLY, THE SAFEPATH4 AUDIO BOOSTER PANEL MAY NOT
OPERATE IN AN EMERGENCY SITUATION WHICH COULD RESULT IN PROPERTY DAMAGE
AND SERIOUS INJURY OR DEATH TO YOU AND/OR OTHERS.
WARNING: IF THE PROTECTIVE SIGNALING SYSTEM SOUNDS AND/OR FLASHES, IT IS A
WARNING THAT A POSSIBLE SERIOUS SITUATION REQUIRES IMMEDIATE ATTENTION.
CAUTION: SAFEPATH4 Audio Booster printed circuit boards are sensitive to static electricity
and have delicate components mounted on it. Discharge any static electricity from your body by
touching a grounded object, such as a metal screw, which is connected to earth ground. Handle the
board by its edges and be careful not to twist or flex it. The SAFEPATH4 Audio Booster panel is to
be installed in a static free area, and the user is to properly attach grounded wrist straps before
touching any static sensitive areas. After handling SAFEPATH4 Audio Booster printed circuit board,
the panel should be tested in accordance with Section 3-6 “System Checkout” of this manual to verify
that it is functioning properly.
NOTE: In areas prone to lighting strikes, using a surge protection device is recommended. Reference
TESAN number S002-99 for recommended manufacturers of surge protection equipment.
This TESAN (Technical Engineering Support Application Notice) is available from the Wheelock
website, www.wheelockinc.com , and is found under the Technical Support tab.
This SAFEPATH4 Audio Booster panel will not work without power. The SAFEPATH4 Audio
Booster panel is powered by 120VAC. 24VDC re-chargeable batteries provide backup power. If both
sources of power are cut off for any reason, the SAFEPATH4 Audio Booster panel will not operate.
DO NOT assume any installation, operation and testing details not shown in this manual.
Notification equipment cannot last forever. Even though SAFEPATH4 Audio Booster is
expected to last up to ten years, any of its parts or components could fail before then. Therefore
testing of the entire protective signaling system, including the SAFEPATH4 Audio Booster
panel, all notification equipment, as well as all messages and their output channel, and priority
assignment, shall be conducted at least twice each year, or more often as required by local, state
and federal codes, regulations and laws, by qualified personnel. If the notification equipment is
not working properly, immediately contact the installer and have all/any problems corrected
immediately. Malfunctioning components should be replaced immediately. Do not attempt to
repair malfunctioning components. Malfunctioning components should be returned for factory
repair or replacement. In the event you cannot contact the installer, contact the manufacturer.

10
WARNING: FOR PROPER OPERATION IN LIFE SAFETY APPLICATIONS, THE
SAFEPATH4 AUDIO BOOSTER PANEL SHALL BE CONNECTED TO A LISTED
COMPATIBLE AND PROPERLY OPERATING VOICE EVACUATION PANEL SUCH AS THE
WHEELOCK, INC SP40/2 PANEL, WHICH CONTROLS ITS ACTIVATION. ALL EQUIPMENT
SHALL BE PROPERLY INTERCONNECTED AND OPERATING. THE INSTALLER SHALL
CHECK COMPATIBILITY OF ALL EQUIPMENT PRIOR TO INSTALLATION, OTHERWISE
THE SAFEPATH4 AUDIO BOOSTER PANEL AND/OR THE VOICE EVACUATION PANEL
MAY BE DAMAGED AND/OR FAIL TO OPERATE IN AN EMERGENCY SITUATION.
WARNING: CERTAIN HARDWARE FUNCTIONS ON THE SAFEPATH4 AUDIO BOOSTER
PANEL ARE NOT SUPERVISED. IF ANY SUCH HARDWARE FUNCTIONS FAIL, THE
SAFEPATH4 AUDIO BOOSTER PANEL MAY NOT PROVIDE THE INTENDED WARNING
AND/OR NOT INDICATE A TROUBLE CONDITION.
Section 1-3 - Compliance with Applicable Codes, Regulations,
Laws, Standards, and Guidelines
COMPLY WITH ALL OF THE LATEST APPLICABLE CODES, REGULATIONS, LAWS,
STANDARDS, AND GUIDELINES.
WARNING: FOR EMERGENCY, LIFE SAFETY APPLICATIONS USING THE SAFEPATH4
AUDIO BOOSTER,INSTALLATION, TESTING AND MAINTENANCE SHALL BE
PERFORMED BY QUALIFIED PERSONNEL IN ACCORDANCE WITH ALL THE LATEST
NATIONAL FIRE PROTECTION ASSOCIATION (NFPA), UNDERWRITER’S LABORATORY
(UL), NATIONAL ELECTRIC CODE (NEC), OCCUPATIONAL SAFETY AND HEALTH
ADMINISTRATION (OSHA), STATE, COUNTY, LOCAL, PROVINCE, DISTRICT, FEDERAL,
AND OTHER APPLICABLE BUILDING AND FIRE STANDARDS, GUIDELINES,
REGULATIONS, LAWS, AND CODES INCLUDING, BUT NOT LIMITED TO, ALL
APPENDICES AND AMENDMENTS AND REQUIREMENTS OF THE LOCAL AUTHORITY
HAVING JURISDICTION (AHJ).
It is recommended that the local AHJ inspect and approve the proposed placement of all the
notification appliances.
NOTE: When installed in NYC, the background music and the telephone paging signals from
the SP40/2 are not permissible.
Section 1-4 - Property Insurance Recommendation
The Voice Evacuation System containing the SAFEPATH4 Audio Booster panel is not a
substitute for insurance. All users should have adequate levels of life and property insurance.
Section 1-5 - Audio Output Considerations
WARNING: AUDIBLE SIGNALS MAY MASK MEDICAL EQUIPMENT MONITORING
ALARMS. WHERE MEDICAL EQUIPMENT MONITORING ALARMS ARE IN USE, DO NOT
USE AUDIBLE SIGNALS; PROVIDE VISUAL NOTIFICATION APPLIANCES IN HIGHLY
VISIBLE LOCATIONS.

11
CAUTION: The output of the audio system may not be heard in all cases. Sound can be
blocked or reduced by walls, doors, carpeting, wall coverings, furniture, insulation, bed coverings,
and other obstacles that may temporarily or permanently impede the output of the audio system.
Sound is also reduced by distance and masked by background noise. The output of the audio
system may not be sufficient to alert all occupants, especially those who are asleep, those who
are hearing-impaired, those who are wearing devices that plug or cover the ears, and those who
have recently used drugs or alcohol. The output of the audio system may not be heard by an
alert person if the output device is placed in an area which is isolated by a closed door, or is
located on a different floor from the person in a hazardous situation or is placed too far away to
be heard over ambient noise such as, but not limited to, running water, traffic, air conditioners,
machinery or musical appliances.
If live microphone announcements, audible tones and/or voice messages cannot be readily heard
and understood clearly within the protected areas as intended, it will be necessary to increase the
number and/or sound output intensity of speakers within those areas so that they are heard and
understood clearly when activated.
Section 1-6 - RF Interference
The SAFEPATH4 Audio Booster panel has been tested and found to comply with the limits for a
Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will be required to correct the
interference at his own expense.
Section 1-7 - General
Each manufacturer's fire alarm control panel and notification appliances operate differently and
have different features. Before specifying, installing, operating, testing, maintaining or servicing a
system, carefully read the installation, operation and testing manual for each piece of equipment
and applicable codes.
Additional copies of this manual may be obtained from:
Wheelock, Inc.
273 Branchport Ave.
Long Branch, N.J. 07740
Tel: [phone]
Fax: [phone]
E-mail: [email protected]

12
Intentionally Blank

13
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.

14
Standard Features
Table 2-1 Standard Features
Feature SPB-80/4 SPB-160
Strobe Input
Circuit
Power limited 8-33VDC NAC or CC
strobe Activation
Strobe Output
Circuit
Two - 24VDC, 2A Max NAC
Supervised power limited strobe
outputs.
Selectable Outputs: Wheelock Sync,
Wheelock Pass Through, or Constant
DC.
Trouble LED's for open and short
output conditions
Supervised with 10K Ohm EOLR.
No Strobe Circuits.
Audio Input
Circuit One 1.2 Watt 25V or 70.7V input One 1.2 Watt 25V or 70.7V input
Audio Output
Circuit
One 80 Watt, 25V or 70.7V selectable,
supervised, power limited audio
output.
Trouble LED's for open and short
output conditions.
Supervised with 10K Ohm EOLR.
Two 80 Watt, 25V or 70.7V
selectable, supervised, power limited
audio output.
Trouble LED's for open and short
output conditions.
Supervised with 10K Ohm EOLR.
Battery Standby
Sleep Mode
When Audio Booster is in the standby mode and is on battery backup, the
amplifier section shuts down to conserve battery power.
The Two Wire Mode also shuts off non-alarm functions on the SP40/2. When a
n
alarm signal
sends a message to the Audio Booster the amplifier section is reenergized and
broadcasts the message.
The Four Wire Mode allows non-alarm functions on the SP40/2. An Auxiliary
NAC/CC input wakes the Audio Booster for broadcast.
Power Supply
Section
120VAC, 3.8A, 50-60Hz input
24VDC, 12AH Battery Backup
24VDC, 0.5A Power Output for Splitter Connections
Ground Fault
Detection
Monitors inputs and outputs for 600K Ohms minimum in relation to ground.
Supervision Full supervision with on-board diagnostics and trouble reporting circuits for:
Audio NAC circuit wiring open and short conditions
Ground Fault detection
Strobe NAC circuit wiring open and short conditions
Amplifier operation
Input voltage/low battery
Trouble Reporting Form C relay trouble contacts for external notification.

15
120 VAC
Audio In
25V or 70.7V
Auxiliary In. For Alarm
Operation of Amplifier
when operating on
Battery Only. 8-33VDC
or Contact closure,
Strobe In
8-33VDC or Contact
Closure
Audio Out 25V
or 70V at 80 Watts,
Supervised
Expansion Out
24VDC at 0.5A
in Alarm Condition
Supervised
DC OUT Constant
24VDC at 0.5A
Unsupervised for
Splitter Power
SPB-80/4
Strobe 1 Out
24VDC at 2A,
Supervised
Strobe 2 Out
24VDC at 2A,
Supervised
Trouble Form C Relay
Rated at 24VDC at 1A
Figure 2-1
Basic Capabilities of the SPB-8/40 SAFEPATH4 Audio Booster Panel
120 VAC
Audio In
25V or 70.7V
Auxiliary In. For Alarm
Operation of Amplifier
when operating on
Battery Only. 8-33VDC
or Contact closure,
Audio 1 Out 25V
or 70V at 80 Watts,
Supervised
Expansion Out
24VDC at 0.5A
in Alarm Condition
Supervised
DC OUT Constant
24VDC at 0.5A
Unsupervised For
Splitter Power
SPB-160
Audio 2 Out 25V
or 70V at 80 Watts,
Supervised
Trouble Form C Relay
Rated at 24VDC at 1A
Figure 2-2
Basic Capabilities of the SPB-160 SAFEPATH4 Audio Booster Panel

16
N
L
PS PS+
_
F1
GND E1
P82798 REV.
T3
W5
W8
SW4
SW1
J2 R23
W1
D28
J1B
D33
D24
D22
W10
D27
D26
D32
D31
D37
D38
D62
D61
W3
D77
D36 D35
D76
D34
W4 W6
D75
J3
D60
F2
F1
TB6
TB5
TB4
TB1
TB2
TB3
AUX
TRB
TROUBLE
AMP TRB
GF
EXP OPEN
EXP SHORT
AUD1 OPEN
AUD1
SHORT
STRB1
OPEN
STRB2
SHORT
STRB1 SHORT
STRB1 OUT
STRB2 OPEN
STRB2
OUT
EXP OUT
POWER
AC TRB
BAT TRB
LVL
N
L
AC
DC IN
DC OUT
BATTERY
AUD1 OUT
STB2 OUT
STB1 OUT
EXP OUT
NO CON
C
NO
NC
T
R
B
STB RET
STB IN
AUX RET
AUX IN
AUD RET
AUD IN
TRANSFORMER
W7
12VDC 12AH
BATTERY
12VDC 12AH
BATTERY
GROUNDING
TERMINAL STRIP
SPB-80/4
PC BOARD
24VDC
POWER SUPPLY
25
70
25
70
25
70
C2A
D59
AC
1
Figure 2-3
Layout of SPB-80/4 SAFEPATH4 Audio Booster Panel

17
N
L
PS PS+
_
F1
GND E1
P82798 REV.
T3
SW1
J2 R23
W1
D28
J1A
D24
D22
W10
D27
D26
D32
D31
D77
D76
D34
W4 W6
D75
J3
D60
F2
F1
TB6
TB5
TB4
TB2
AUX
TRB
TROUBLE
AMP TRB
GF
EXP OPEN
EXP SHORT
AUD1 OPEN
AUD1
SHORT
EXP OUT
POWER
AC TRB
BAT TRB
DC IN
DC OUT
BATTERY
AUD2 OUT
AUD1 OUT
EXP OUT
NO CON
C
NO
NC
T
R
B
AUX RET
AUX IN
AUD RET
AUD IN
J4
J5
AUD2 OPEN
AUD2 SHORT
D30
D29
TRANSFORMER
W7
GROUNDING
TERMINAL STRIP
SPB-160
PC BOARD
24VDC
POWER SUPPLY
12VDC 12AH
BATTERY
12VDC 12AH
BATTERY
25
70
25
70
25
70
25
70
C2A
D59
AC
TB1
N
L
AC
1
Figure 2-4
Layout of SPB-160 SAFEPATH4 Audio Booster Panel

18
Intentionally Blank

19
Chapter 3 - Installation and Setup
Section 3-1 - Introduction
The lives of people depend upon your safe and proper installation of the voice evacuation system
and the Audio Booster Panel. Please read, understand and carefully follow the specific
installation instructions set forth below to avoid damage to the panel and equipment connected to
it. Only qualified personnel in accordance with the procedures in this manual should conduct
installation.
WARNING: SHUT OFF ALL POWER BEFORE STARTING THE INSTALLATION.
ELECTRICAL SHOCK CAN CAUSE DEATH OR SERIOUS INJURY.
WARNING: DO NOT CONNECT AC POWER OR BATTERY BACKUP POWER UNTIL
SYSTEM WIRING HAS BEEN CONNECTED, MODULES HAVE BEEN INSTALLED, AND
FIELD WIRING HAS BEEN INSPECTED.
CAUTION: The printed circuit board is sensitive to static electricity and has delicate
components mounted on it. Before handling the board or any component on it, discharge any
static electricity from your body by touching a grounded object such as a metal screw, which is
connected to earth, ground. The panel is to be installed in a static free area and the user is to
properly attach grounded wrist straps before touching any static sensitive areas.
The installer, prior to installation should consult with the authorities having
jurisdiction (AHJ).
Section 3-2 – Two Wire and Four Wire Audio Modes
Modes
There are two modes of operation for the audio input. These modes are: Two Wire and Four
Wire. A maximum of 33 Audio Booster panels can be connected to an SP40/2 panel.
The Two Wire Audio Mode is used with the Wheelock, Inc. SP40/2 voice evacuation panel.
Supervision of the audio booster is performed over the same two wires used by the audio input
signal. If any one audio booster connected in the system goes into trouble, all secondary
operations (background music (BGM), telephone paging, and night ring) will disengage from all
audio boosters connected in the system. This method conserves battery backup power, if AC
power is lost. When an alarm message or a live voice message from the microphone is broadcast
by the SP40/2, the audio booster is amplifier section is energized and the message is broadcast.
Connecting 1 to 33 Audio Booster panels to an SP40/2 in the two wire mode is done by
connecting the audio returns (AUD RET) to the next audio input (AUD IN), and placing the UL
Listed 10K Ohm EOLR on the last AUD RET. Jumper W10 shall be installed. This is illustrated in
Figure 3-1.

20
AUDIO
BOOSTER
SP40/2
AUD OUT
AUD IN
AUD RET
AUD IN
AUD RET
AUD IN
AUD RET
UL Listed
10K Ohm
EOLR
W1
W10
Closed
Closed
W1
W10
Closed
Closed
W1
W10
Closed
Closed
AUDIO
BOOSTER
AUDIO
BOOSTER
Figure 3-1
Connections for Multiple Audio Booster in Two-Wire Mode
The Four Wire Audio Mode is used when multiple Audio Boosters are used on the output of the
SP40/2 and it is not desirable to lose secondary operations when a single audio booster goes into
trouble. Only that Audio Booster will lose secondary operations. An 8-33VDC NAC or a contact
closure applied to the AUX IN terminals will energize the Audio Booster on battery backup and
have it broadcast the message.
Connecting 1 to 33 Audio Booster panels to an SP40/2 in the four wire mode is done by
connecting the audio output (AUD OUT) from the SP40/2 to the master Audio Booster panels
audio input (AUD IN). The UL Listed 10K Ohm EOLR shall be placed on the last Audio Booster
AUD RET. Connecting multiple Audio Booster panels is illustrated in Figure 3-1.