B&B BBA54 User manual

BBA54 /BBA54-12
Remote Stereo Amplifier
B&Belettronica srl
41100 MODENA (Italy) - Via Malavolti, 49
Tel. [phone] Fax. [phone]
www.bbelettronica.it e-mail: bb
@
bbelettronica.it
Operating instructions
3
6
2
5
7
1
4
1volume
2volume
RADIO
3select radio +
p
ower-on for am
p
lifier
VIDEO
4select video +
p
ower-on for am
p
lifier
OFF
5am
p
lifier off
MK1
6micro
p
hone 1 o
p
eratin
g
li
g
ht
MK2
7micro
p
hone 2 o
p
eratin
g
li
g
ht
GAIN
8reduce
g
ain
GAIN
9increase
g
ain
LED
10 LED li
g
ht
8 10 9

General Features
A new concept Digital Stereo Amplifier for vehicles, with significant technological
innovations. All functions are controlled by a micro-controller. Audio inputs (Radio-
Video) and volume control. It may be connected to any model/brand of Radio-
Tape/CD player, which it also supplies power voltage to. Power-on for video system.
Two microphone inputs with independent volume control and priority over all other
sources. RS485 dual serial port (interfaceable with CAN systems) to integrate into
the vehicle devices and to dialogue with different B&B devices. Can be cascade-
linked to more amplifiers to create different listening zones. Compact, versatile and
easy to install. Works independently, connected to other (B&B) amplifiers or with the
(BBT54) appropriate command keypad which enables direct source selection and
volume adjustment. Its small size means it fits easily into any part of the vehicle.
Caution
It is recommended to carefully read through the instructions, prior to setting this
device in operation; a thorough understanding of the basics means an easier
utilization of this device.
Please, follow the instructions to carry out the “BBA54” amplifier connections:
chapter 4 CONNECTIONS
chapter 5 DIAGRAMS OF CONNECTION
Index
1 Technical specifications……………. 17-18
2 Operating without the keypad ..…… 19
2.1 Power-on and off
2.2 Inputs / Functionality
3 Operating with the keypad ….….….. 20
3.1 Power-on and off
3.2 Inputs / Functionality
4 Connections…………………………... 21
5 Diagrams of connection ….………... 22÷26
BBA54 Technical Specifications
ALC =Automatic Level Control (only active when the keypad is connected)
Exclusive circuit controlled by micro-processor. It continuously analyses and corrects the input
signal amplitude changes (50÷600mV), thus keeping constant the set amplitude level.
ELS =Electronic Loop Separator
Advanced circuit with differential input, it stops any noise from GND non suitable connections.
Main Specs
Voltage rating 28 Vdc (18÷32 Vdc)
Absorbed current 5 A max
Safeties
Short circuit on all outputs
Reversed polarity on power input
Voltage surge - Under-voltage
(Load Dump 150 Vp - 300 ms)
Operating temperature 0 +70 °C
Storage temperature -40 +85 °C
Sizes (L x H x D) 155 x 70 x 60 mm
Weight 0,750 Kg
Inputs
Radio power 1÷12 V RMS on 200 Ohm ALC + ELS
Radio-Video 50÷600 mV RMS on 2,2 kOhm ALC + ELS
Mikes level 1 mV RMS on 680 Ohm ELS
Common-mode rejection > 60 db (10 Hz - 1 MHz)
Inputs separation > 55dB (100 Hz - 10 kHz)
Video mono-stereo selection
REM In Radio and Video 8 Vdc min 32 Vdc max
DC Outputs
V out rating 13.8 Vdc ± 5% - 4 A max
REM Out 13.8 Vdc ± 5% - 500 mA max
AC Outputs
Power OUT 2x25 W RMS (4 Ohm - THD 10%)
Audio Pre Out 350 mV RMS with max volume ALC
Passband 20÷20000 Hz (4 Ohm - 18 W THD 1%)
S/N ratio > 65 dB (closed inputs - 100 Hz - 10 kHz)
Power noise rejection > 70 dB (100 Hz - 10 kHz)
Video relays contacts 5 A max
BBT54 Keypad (powered by the amplifier)
Sizes: 51 x 51 x18 mm Weight: 45 g

BBA54-12 Technical Specifications
ALC = Automatic Level Control (only active when the keypad is connected)
Exclusive circuit controlled by micro-processor. It continuously analyses and corrects the input
signal amplitude changes (50÷600mV), thus keeping constant the set amplitude level.
ELS = Electronic Loop Separator
Advanced circuit with differential input, it stops any noise from GND non suitable connections.
Main Specs
Voltage rating 13,8 V DC (10÷16V)
Absorbed current 7 A max
Safeties
Short circuit on all outputs
Reversed polarity on power input
Voltage surge - Under-voltage
(Load Dump 90 Vp - 300 ms)
Operating temperature 0 +70 °C
Storage temperature -40 +85 °C
Sizes (L x H x D) 155 x 70 x 60 mm
Weight 0,750 Kg
Inputs
Radio power 1÷12 V RMS on 200 Ohm ALC + ELS
Radio-Video 50÷600 mV RMS on 2,2 kOhm ALC + ELS
Mikes level 1 mV RMS on 680 Ohm ELS
Common-mode rejection > 60 db (10 Hz - 1 MHz)
Inputs separation > 55dB (100 Hz - 10 kHz)
Video mono-stereo selection
REM In Radio and Video 8 Vdc min 32 Vdc max
DC Outputs
V out rating 13.8 Vdc ± 5% - 4 A max (6 A peak)
REM Out 13.8 Vdc ± 5% - 500 mA max
AC Outputs
Power OUT 2x25 W RMS (4 Ohm - THD 10%)
Audio Pre Out 350 mV RMS with max volume ALC
Passband 20÷20000 Hz (4 Ohm - 18 W THD 1%)
S/N ratio > 65 dB (closed inputs - 100 Hz - 10 kHz)
Power noise rejection > 70 dB (100 Hz - 10 kHz)
Video relays contacts 5 A max
BBT54 Keypad (powered by the amplifier)
Sizes: 51 x 51 x18 mm Weight: 45 g
Operating the BBA54 and BBA54-12 without the keypad 2
When power is supplied the amplifier (BBA54 or BBA54-12)goes into standby mode
and supplies power to the connected radio (Radio-Tape/CD). By supplying voltage to
the REM-RADIO (switching on the radio) or REM-VIDEO (switching on the video system) or
activating the microphones (MK1-MK2), the amplifier switches on. It is possible to
adjust the gain of each active source individually. Adjustments remain in the memory
even when the supply voltage is switched off. The REM-VIDEO has priority over the
REM-RADIO, MK1 and MK2 have precedence over both of them and MK1 has priority
over MK2. In the absence of these commands, the amplifier returns to standby.
Power-on and off 2.1
REM-RADIO (switching on the radio), REM-VIDEO (switching on the video system)
or with MIKE1/MIKE2 being active, the amplifier is switched on.
In the absence of these commands, standby mode is restored.
Inputs/Functionality 2.2
RADIO: input for Radio -Tape/CD
On switching on, the radio (Radio-Tape/CD) supplies voltage (REM-RADIO) to contact
no. 2 of the “RADIO PW” connector of the determining amplifier: source on and
source selection.
VIDEO: input for video system audio
Voltage (REM-VIDEO) supplied to contact no.10 of the “POWER” connector
determines: switching on monitors, amplifier and source selection. The VIDEO input
has priority over the RADIO.
Mikes: The amplifier is provided with two mike inputs (MK1-MK2) with priority over
all other sources, mikes are switched on with their own switch, and are not
dependent from the amplifier status (on or off).
Gain adjustment: Volume adjustment (in this configuration) depends on the
sources connected to the amplifier. However, it is possible to set the desired gain for
each active source, by using the (gain + or gain -) buttons on the amplifier. The red
LED flashes during the adjustment phase. The gain values set remain in the memory
even if the power is removed from the amplifier.
RS485 Serial: The RS485 dual serial port (MODBUS-RTU protocol) allows the
amplifier (master) to dialogue with all B&B devices and with any other systems in
existence. The peripheral units (slaves) identification is determined by the position of
the decimal uniselector on board all B&B equipment.
Just assign a number (1÷7) to each slave. Please, note that the number “0” is
assigned to the master.

3 Operating the BBA54 and BBA54-12 with the keypad
When power is supplied the amplifier (BBA54 or BBA54-12)goes into standby mode
and supplies power to the connected radio (Radio-Tape/CD). By pressing the relevant
button for the required source (RADIO or VIDEO) or by activating the microphones
(MK1 or MK2), the amplifier is switched on (MK1 has priority over MK2). In this mode it is
possible to adjust the volume of each active source individually. Adjustments remain
in the memory even when the supply voltage is switched off. To turn off the amplifier,
press the OFF button, which restores it to standby mode.
3.1 Power-on and off
Select: Radio or Video to power-on the amplifier. The corresponding key will change
color from green to red, the OFF esc one will change from red to green. Press the
OFF key to power-off the amplifier.
3.2 Inputs/Functionality
RADIO: input for Radio-Tape/CD.
The amplifier supplies power to the connected radio.
Volume control is effected by pressing the buttons + or -, and remains in the memory
even if even if the power is removed from the amplifier.
VIDEO: input for video system audio.
The amplifier controls the on/off switch of the monitors.
Volume control is effected by pressing the buttons + or -, and remains in the memory
even if even if the power is removed from the amplifier.
Mikes: The amplifier is provided with two mike inputs (MK1-MK2) with priority over
all other sources, mikes are switched on with their own switch, and are not
dependent from the amplifier status (on or off).
Volume control is effected by pressing the buttons + or -, and remains in the memory
even if even if the power is removed from the amplifier.
RS485 Serial: The RS485 dual serial port (MODBUS-RTU protocol) allows the
amplifier (master) to dialogue with all B&B devices and with any other systems in
existence. The peripheral units (slaves) identification is determined by the position of
the decimal uniselector on board all B&B equipment.
Just assign a number (1÷7) to each slave. Please, note that the number “0” is
assigned to the master.
CONNECTIONS

BBA54-12 12V
BBA54 24V

BBA54-12 12V + BBT54
BBA54 24V + BBT54

EXSAMPLE OF CASCADE CONNECTION