Baldwin Boxall BV225 User manual

BV225 Amplifier
Installation Instructions
Firmware version: N/A
Manual name: BV225 Installation Manual
Issue: 3
ECR: 2768
Date of issue: July 2013

BV225 Amplifier
Installation Instructions
ii BV225 Installation Manual issue 3
© July 2013 Baldwin Boxall Communications Limited
Wealden Industrial Estate
Farningham Road, Jarvis Brook
Crowborough
East Sussex
TN6 2JR
UK
Telephone: [phone]
Facsimile: [phone]
Email: [email protected].uk
Website: http://www.baldwinboxall.co.uk
This equipment has been designed and manufactured to conform to the following
EC Standards:
EMC: EN55103-1 Environment Classification: E1,
EMC: EN55103-2 Environment Classification: E5,
Safety: EN60065
Failure to use the equipment in the manner described in the product literature
will invalidate the conformity.
A “Declaration of Conformity” statement to the above standards and a list of
auxiliary equipment used for compliance verification is available on request.

BV225 Amplifier
Installation Instructions
BV225 Installation Manual issue 3 iii
Amendment Record ___________________________________ v
Proprietary Notice ____________________________________ v
Safety Information ___________________________________ vi
Comments_________________________________________ vi
Introduction
BV225 Amplifier Description_____________________________1
BV225 Amplifier Specifications ___________________________2
Installation Examples
Example 1: A-B Dual Circuit _____________________________4
Example 2: Paralleled Outputs for Higher Power ______________5
Basic Fault Finding
“Power” LED not illuminated ____________________________7
“Overload” LED Illuminated _____________________________8
Abnormal Load Condition - - - - - - - - - - - - - - - - - - - - - - - 8
Over Temperature Condition- - - - - - - - - - - - - - - - - - - - - - 8
Disassembly Procedures ________________________________8
Maintenance
Maintenance Requirements of BS5839-8 ____________________9
BV225 Amplifier Routine Maintenance _____________________9

BV225 Amplifier
Installation Instructions
iv BV225 Installation Manual issue 3

BV225 Amplifier
Installation Instructions
BV225 Installation Manual issue 3 v
AMENDMENT RECORD
PROPRIETARY NOTICE
All data and information contained within this manual is of a
proprietary nature with the exclusive title to the same held by
Baldwin Boxall Communications Limited. The possession of this
manual and the use of the information is, therefore, restricted
only to those persons duly authorised by Baldwin Boxall
Communications Limited.
Do not reproduce, transcribe, store in a retrieval system or
translate into any language, any part of this manual without the
prior permission of Baldwin Boxall Communications Limited.
In the interest of continual product development, Baldwin Boxall
Communications Limited reserves the right to make changes to
product specification without notice or liability. Use of Baldwin
Boxall Communications Limited products as critical components
in life support systems is not authorised except with express
written approval from Baldwin Boxall Communications Limited.
Change Note
Number
Nature of Amendment Date of
Amendment
DP190 Initial release: Issue 1 Oct 2010
ECR2501 Issue 2: Updated "Master" Parallel DIL SW settings Feb 2011
ECR2768 Revised Specification July 2013

BV225 Amplifier
Installation Instructions
vi BV225 Installation Manual issue 3
SAFETY INFORMATION
Personnel who install, maintain or repair this equipment must
read the safety information below before starting work.
Voltages in excess of 30 Volts RMS or 50 Volts DC are considered
Hazardous and in certain circumstances can be lethal.
If Functional Testing, Maintenance, or Repair is to be completed
with the Mains Power (and/or battery backup) connected then
this should only be undertaken by personnel who are fully aware
of the danger involved and who have taken adequate precautions
and training.
This Manual contains Warnings, Cautions and Notes.
War nings describe potential threats to health or life, e.g.
Cautions describe potential threats to the equipment, e.g.
Notes are statements that are useful to the user in the context of
a particular section of the manual, e.g.
COMMENTS
Comments regarding the content of this manual are welcome and
should be addressed to [e-mail].
!
WARNING
Before attempting to remove this component, ensure the Mains
Power Supply and Battery Backup have been disconnected.
CAUTION
Notice must be taken of all cautions.
If a Caution is ignored the equipment may be damaged.
CAUTION: ELECTRO-STATIC SENSITIVE DEVICES
Observe the relevant precautions for the protection of Electro-
static Sensitive Devices when handling this equipment.
NOTE: Do not speak into the microphone until the "Speak Now" LED is
illuminated.

BV225 Amplifier
Installation Instructions
BV225 Installation Manual issue 3 1
1 Introduction
1.1 BV225 AMPLIFIER DESCRIPTION
The BV225 Amplifier module is a 225 Watt Class “D” Power
amplifier with a 500mV Balance Line audio input and 100V Line
output.
The front panel status indicators show “Power”, “Overload” and
Output Level (10% and 100% output level).
The audio input is presented on two separate RJ45 connectors.
The output is presented on two 3-way plug/cage clamp
termination connectors providing 50V or 100V output.
The 24V DC input is presented on a two 2-way crimp connected
socket.
The power output stage of the amplifier is protected against
overload conditions (i.e. short circuits or abnormal loads).
Should an amplifier be subjected to an abnormal load the input to
the relevant power amplifier is attenuated to a safe level and the
“Overload” LED will be illuminated. The amplifier output
voltages are also sensed and should they exceed 100V the relevant
input signal will be attenuated ensuring safe operation without
creating unnecessary distortion.

BV225 Amplifier
Installation Instructions
2BV225 Installation Manual issue 3
Over temperature protection is provided using sensors attached
to the output stage heat sink. Should the temperature exceed 90
Degrees Celsius the input signal to the relevant amplifier will be
attenuated to a safe level and the “Overload” LED will be
illuminated.
If the system is under surveillance it will cause the surveillance
detector to indicate a fault condition due to the gain reduction.
1.2 BV225 AMPLIFIER SPECIFICATIONS
Parameter Value (Per Amplifier)
Rated output power less than 0.2% THD 225W @ 44.5Ω
Output regulation 225W @ 44.5ΩBetter than 1.5dB
Output Voltages obtainable 50V & 100V
Frequency response 225W @ 44.5Ω(-3dB) 35Hz - 20kHz
Input sensitivity and impedance 500mV @ 40KΩ
Input common mode rejection ratio (50Hz - 20kHz) Better then 40dB, typically 60dB
Output noise reference to rated output Better than 85dB
Cross talk between amplifiers @ 1kHz Better than 70dB
Supply Voltage 22V - 35V DC
Supply Current: Sleep mode @ 26V (Battery supply) 50mA
Supply Current: Quiescent @ 30V (Mains supply) 160mA
Supply Current: Rated output power 225W @ 44.5Ω10A
Supply DC Fuse (Automotive Style Blade) 15A
Output Stage Protection: Thermal Output stage above 90°C
Output Stage Protection: Load Excessive Output Stage Current
Output Stage Protection: Action Reduces input to a safe level
Front Panel Indicators
Power (Green) DC Supply Connected
Overload (Yellow) Protection circuit operating
100% (Yellow) 100V Output Voltage
10% (Green) 10V Output Voltage
Terminations
Loudspeaker 100V Line Output 2 off 3 way cage clamp
Balanced Line Inputs 2 off RJ45 connectors
DC Supply Input 2 pin crimp connectors

BV225 Amplifier
Installation Instructions
BV225 Installation Manual issue 3 3
2 Installation Examples
The BV225 Amplifier has been designed for quick and simple
connection and configuration.
The unit can either be used as an independent Amplifier Module,
can be one of two amplifiers wired as an A-B Dual Circuit using a
single input signal, or can be paralleled with other BV225
Amplifiers to enable higher power outputs.
The amplifier has two paralleled input connectors to enable
simple interconnection using standard RJ45 patch leads.
The 100V Line output connectors are “cage clamp” type as this
type of connector is more reliable than screw terminals.
The DC connector is a polarised two way latching crimp
connector.

BV225 Amplifier
Installation Instructions
4BV225 Installation Manual issue 3
2.1 EXAMPLE 1: A-B DUAL CIRCUIT
Figure 2.1 — Both Amplifiers use the same Input Signal
NOTE: A six way DIL switch is located on the side panel.
The switch does not need to be changed from factory default settings when
the unit is used as an independent amplifier or as two amplifiers in
A-B Dual Circuit.
Default (master) settings SW1.1 & SW1.2 "OFF" (Up), SW1.3 - 1.6
"ON" (Down).

BV225 Amplifier
Installation Instructions
BV225 Installation Manual issue 3 5
2.2 EXAMPLE 2: PARALLELED OUTPUTS FOR
HIGHER POWER
Figure 2.2 — Connection Details & Settings for Paralleled Amplifiers
The “Slave” amplifier units obtain their input signal after the pre-
amplifier stage of the “Master” unit. Only one pre-amplifier stage
is required and this ensures the input signal to all power amplifiers
is identical.
The 100V Line Outputs of all units are connected in parallel.
NOTE: A six way DIL switch is located on the side panel.
The switch settings must be changed from factory default settings when the
units are used parallelled together.
Master settings: SW1.1 - SW1.6 "ON"
Slave settings: SW1.1 & SW1.2 "ON", SW1.3 - 1.6 "OFF".

BV225 Amplifier
Installation Instructions
6BV225 Installation Manual issue 3

BV225 Amplifier
Installation Instructions
BV225 Installation Manual issue 3 7
3Basic Fault Finding
The BV225 Amplifier front panel provides indicators to show the
current status of the unit. The following sections provide basic
Fault Finding information should these indicators show a fault
condition.
3.1 “POWER” LED NOT ILLUMINATED
The Supply LED should be permanently illuminated to show the
24V DC supply is present.
The BV225 Amplifier is protected by an internal 15A automotive
style blade fuse.
If the internal fuse blows when power is applied then it has
suffered an internal fault and should be replaced with a
serviceable unit. The faulty unit should be returned to Baldwin
Boxall for repair.
If the fuse has not blown but the “Supply” LED is not illuminated
then the relevant BVSMP Power Supply should be checked.
CAUTION
To prevent damage to the unit only replace a blown fuse with the
correct rating and type. Before replacing a blown fuse ensure the
power supply has been disconnected from the unit.

BV225 Amplifier
Installation Instructions
8BV225 Installation Manual issue 3
3.2 “OVERLOAD” LED ILLUMINATED
3.2.1 Abnormal Load Condition
The output stage is protected against overload conditions (e.g.
short circuits or abnormal loads) by sensing the current and
voltage and using these to control an input attenuator.
Should the amplifier be subjected to an abnormal load the input
to the power amplifier is attenuated to a safe level using the VCA.
The amplifier output voltage is also sensed and should it exceed
100V the VCA will be activated and will reduce the input signal
ensuring safe operation without creating unnecessary distortion.
If the system is under surveillance it will cause the surveillance
detector to indicate a fault condition due to the gain reduction.
3.2.2 Over Temperature Condition
Over temperature protection is provided using a sensor attached
to the output stage heatsink.
Should the temperature exceed 90°C the input signal to the
power amplifier is attenuated to a safe level using a Voltage
Controlled Attenuator and the front panel indicator is
illuminated.
If the system is under surveillance it will cause the surveillance
detector to indicate a fault condition due to the gain reduction.
3.3 DISASSEMBLY PROCEDURES
There are no Disassembly Procedures for this unit.
!
WARNING
The BV225 Amplifier output stages contain Hot Parts, High
Voltages, and operate at High Frequencies.
Do not attempt to disassemble these units or operate them
without the covers in place.

BV225 Amplifier
Installation Instructions
BV225 Installation Manual issue 3 9
4 Maintenance
4.1 MAINTENANCE REQUIREMENTS OF
BS5839-8
When the BV225 Amplifier is installed in a Voice Alarm System
then the system must be maintained according to the
requirements of BS5839-8.
4.2 BV225 AMPLIFIER ROUTINE
MAINTENANCE
The BV225 Amplifier amplifier module requires a minimum of
routine maintenance.
If the unit is operated in a particularly dusty environment, it may
be necessary to occasionally remove accumulated dust from the
external heatsink using a vacuum cleaner or similar.