Bosch PRS-xPxxx, LBB 4428-00 User Manual

Communications Systems | PRS‑xPxxx and LBB 4428/00 Power Amplifiers

PRS‑xPxxx and LBB 4428/00 Power
Amplifiers

www.boschsecurity.com

u 1, 2, 4, or 8 audio outputs (selection from 100 / 70 /

50 V outputs)

u Audio processing and delay for each amplifier

channel

u Amplifier supervision and spare amplifier switching

u Loudspeaker line and loudspeaker supervision

(LBB 4428/00 only line supervision)

u Eight control inputs and 1, 2, 4 or 8 control outputs

There are four types of Power Amplifier units in the
Praesideo product range. These differ in the number of
amplifier channels per frame: one, two, four, or eight.
The overall power rating is 500 watts for all of the
amplifiers.

The Power Amplifiers can be set to 100 V, 70 V and
50 V output tappings. They have short-to-ground and
short-circuit detection functions, and can generate
their own pilot tone for supervision purposes.

Functions

The Power Amplifiers receive input signals over the
network. They also have two auxiliary audio inputs
(four for LBB 4428/00) for local audio. Their eight
control inputs are freely programmable for system
actions, and priorities can be assigned to these inputs.
Each control input has the ability to monitor the
attached line for open and short-circuits. Control
outputs are freely programmable for faults and call
related actions.

The 2 x 16‑character display and the rotary control
enable local status enquiries. The display shows the
VU‑meter reading, when the audio monitoring mode is
active. Audio can be monitored by headphone.

The units are self-monitoring and continually report
their status to the network controller. They support
both single branch and redundant loop cabling. The
amplifiers have a changeover facility for spare power
amplifier switching. Changeover relays are included
with the units. The amplifiers have a 48 V DC back-up
supply input.

The digital audio processing can handle three
parametric equalization sections and two shelving
equalization sections per channel with configurable
audio delay.

Controls and indicators

•

2 x 16-character LCD for status display

• Rotary/push control button

• Mains switch

• Voltage selector for PRS‑xPxxx

Interconnections

•

Mains input

• Battery backup input

• Two system network connections

• Two mic/line inputs (four for LBB 4428/00)

• Selectable 100 V, 70 V or 50 V outputs (per channel)

• Fixed 50 V output

• Eight programmable control inputs

• Control output (for each amplifier channel)

• Headphone output

• Spare amplifier connection (for each amplifier
channel)

Certifications and approvals

Safety

acc. to IEC 60065 / EN 60065

Immunity

acc. to EN 55103‑2 / EN 50130‑4 /
EN 50121‑4

Emissions acc. to EN 55103-1 / FCC-47 part 15B

Emergency

acc. to EN 60849 / EN 54‑16 /
ISO 7240‑16

Maritime acc. to IEC 60945

Region Certification

Europe CPD

CPD _V3.6_&_V4.0

Installation/configuration notes

2

7

6

5

4

12

11

10

9

3

1

8

1 Audio inputs, 2 x or 4 x

2 Control inputs

3 Plastic optical fiber network

4 Loudspeaker outputs, 1 x, 2 x, 4 x, 8 x

5 Spare amplifier input

6 Control outputs, 1 x, 2 x, 4 x, 8 x

7 Mains input

8 48 V backup supply

9 Display and control

10 Network processor and DSP

11 Network redundancy switching

12 Power supply

Block diagram

Parts included

QuantityComponent

1

PRS‑xPxxx or LBB 4428/00 Power Amplifier

1 Power cord

1 Set of mounting brackets (large) for 19” rack

1

Set of feet

1 Set of connectors

Technical specifications

Electrical

Mains power supply

Voltage

PRS‑xPxxx

115 / 230 VAC ±10%, 50/60 Hz

LBB 4428/00 100 to 240 VAC ±10%, 50/60 Hz

Power consumption Pmax -3 dB* / idle** / standby

PRS‑1P500

350 / 50 / 20 W

PRS‑2P250 350 / 53 / 21 W

PRS‑4P125 350 / 66 / 23 W

LBB 4428/00

430 / 90 / 32 W

* Alarm tone level

** With pilot tone 15 V

Battery power supply

Voltage 48 VDC -10% to +20%

Power consumption Pmax -3 dB* / idle** / standby

PRS‑1P500

330 / 40 / 10 W

PRS‑2P250 330 / 43 / 11 W

PRS‑4P125 330 / 56 / 13 W

LBB 4428/00

400 / 65 / 22 W

* Alarm tone level

** With pilot tone 15 V

2 | PRS‑xPxxx and LBB 4428/00 Power Amplifiers

Mic/line inputs 2 x (4 x for LBB 4428/00)

Connector 6-pole header for removable screw

connector (mono, balanced)

Line

Frequency response

-3 dB @ 50 Hz and 20 kHz (±1 dB)

S/N >87 dBA

CMRR >40 dB @ 1 kHz

Input range

-6 dBV to 6 dBV

Input impedance 22 kohm

Mic

Frequency response

-3 dB @ 100 Hz and 16 kHz

Nominal input level -57 dBV

S/N >62 dBA with 25 dB headroom

CMRR

40 dB at 1 kHz

Input impedance 1360 ohm

Phantom supply 12 V ±1 V @ 15 mA

Input range -7 dBV to +8 dBV ref nominal input

value

Control inputs 8 x

Connectors

Removable screw terminals

Operation Closing contact (with supervision)

Control outputs 1 x per amplifier channel

Connectors

Removable screw terminals

Performance

Frequency response

PRS‑xPxxx

60 Hz to 19 kHz (-3 dB)

LBB 4428/00 80 Hz to 19 kHz (-3 dB)

S/N >85 dB (no pilot tone)

Crosstalk

<80 dB at nominal load for 1 kHz

Distortion <0.3% (@ 1 kHz) @ 50% of rated

output power

Loudspeaker outputs PRS‑1P500

Rated load resistance 20 ohm (100 V); 10 ohm (70 V) 5 ohm

(50 V)

Rated load capacitance

250 nF (100 V); 500 nF (70 V)
1000 nF (50 V)

Rated output power
(per channel)

500 W (1 min. at 55 °C)

250 W (30 min. at 55 °C, cont. at
30 °C)

125 W (cont. at 55 °C)

Connector 9‑pole header for removable screw

connector

Loudspeaker outputs PRS‑2P250

Rated load resistance 40 ohm (100 V); 20 ohm (70 V)

10 ohm (50 V)

Rated load capacitance 125 nF (100 V); 250 nF (70 V) )

500 nF (50 V)

Rated output power
(per channel)

250 W (1 min. at 55 °C)

125 W (30 min. at 55 °C, cont. at
30 °C)

60 W (cont. at 55 °C)

Connector

9‑pole header for removable screw
connector

Loudspeaker outputs PRS‑4P125

Rated load resistance 80 ohm (100 V); 40 ohm (70 V)

20 ohm (50 V)

Rated load capacitance

62 nF (100 V); 125 nF (70 V) ) 250 nF
(50 V)

Rated output power
(per channel)

125 W (1 min. at 55 °C)

60 W (30 min. at 55 °C, cont. at 30 °C)

30 W (cont. at 55 °C)

Connector

9‑pole header for removable screw
connector

Loudspeaker outputs LBB 4428/00

Rated load resistance 166 ohm (100 V); 83 ohm (70 V)

42 ohm (50 V)

Rated load capacitance

30 nF (100 V); 60 nF (70 V) ) 120 nF
(50 V)

Rated output power
(per channel)

60 W (1 min. at 55 °C)

30 W (30 min. at 55 °C, cont. at 30 °C)

15 W (cont. at 55 °C)

Connector

9‑pole header for removable screw
connector

Mechanical

Dimensions (H x W x D)

for tabletop use, with feet 92 x 440 x 400 mm

(3.6 x 17.3 x 15.7 in)

for 19” rack use, with
brackets

88 x 483 x 400 mm
(3.5 x 19 x 15.7 in)

in front of brackets 40 mm (1.6 in)

behind brackets

360 mm (14.2 in)

3 | PRS‑xPxxx and LBB 4428/00 Power Amplifiers

Weight

PRS‑1P500 12.6 kg (27.78 lb)

PRS‑2P250 13.6 kg (29.98 lb)

PRS‑4P125 16.1 kg (35.49 lb)

LBB 4428/00

15.8 kg (34.83 lb)

Mounting Standalone; 19”-rack

Color Charcoal with silver

Environmental

Operating temperature

-5 ºC to +55 ºC (+23 ºF to +131 ºF)

Storage temperature

-20 ºC to +70 ºC (-4 ºF to +158 ºF)

Relative humidity 15% to 90%

Air pressure 600 to 1100 h Pa

Ordering information

PRS‑1P500 Power Amplifier 1 x 500 W

1-channel power amplifier with Praesideo network
connection, 1 x 500 W, rack unit 2 RU.

Order number PRS-1P500

PRS‑2P250 Power Amplifier 2 x 250 W

2-channel power amplifier with Praesideo network
connection, 2 x 250 W, rack unit 2 RU.

Order number PRS-2P250

PRS‑4P125 Power Amplifier 4 x 125 W

4-channel power amplifier with Praesideo network
connection, 4 x 125 W, rack unit 2 RU.

Order number PRS-4P125

LBB 4428/00 Power Amplifier 8 x 60 W

Rack unit 2 HU, 8-channel power amplifier with
Praesideo network connection, 8 x 60 W.

Order number LBB4428/00

PRS‑1P500‑US Power Amplifier 1 x 500 W

1-channel power amplifier with Praesideo network
connection, 1 x 500 W, rack unit 2 RU, USA version.

Order number PRS-1P500-US

PRS‑2P250‑US Power Amplifier 2 x 250 W

2-channel power amplifier with Praesideo network
connection, 2 x 250 W, rack unit 2 RU, USA version.

Order number PRS-2P250-US

PRS‑4P125‑US Power Amplifier 4 x 125 W

4-channel power amplifier with Praesideo network
connection, 4 x 125 W, rack unit 2 RU, USA version.

Order number PRS-4P125-US

LBB 4428/00‑US Power Amplifier 8 x 60 W

8-channel power amplifier with Praesideo network
connection, 8 x 60 W, rack unit 2 RU, USA version.

Order number LBB4428/00-US

PRS‑1P500‑CN Power Amplifier 1 X 500 W

1-channel power amplifier with Praesideo network
connection, 1 x 500 W, rack unit 2 RU, Chinese
version.

Order number PRS-1P500-CN

PRS‑2P250‑CN Power Amplifier 2 x 250 W

2-channel power amplifier with Praesideo network
connection, 2 x 250 W, rack unit 2 RU, Chinese
version.

Order number PRS-2P250-CN

PRS‑4P125‑CN Power Amplifier 4 x 125 W

4-channel power amplifier with Praesideo network
connection, 4 x 125 W, rack unit 2 RU, Chinese
version.

Order number PRS-4P125-CN

LBB 4428/00‑CN Power Amplifier 8 x 60 W

8-channel power amplifier with Praesideo network
connection, 8 x 60 W, rack unit 2 RU, Chinese version.

Order number LBB4428/00-CN

Accessories

LBB 4440/00 Supervision Control Board

Line and loudspeaker supervision master PCB for
mounting in a Praesideo network connected power
amplifier, one board is needed per channel.

Order number LBB4440/00

LBB 4441/00 Loudspeaker Supervision Board

Loudspeaker supervision slave PCB for mounting on a
loudspeaker, operates with LBB4440/00 for
monitoring the integrity of the loudspeaker.

Order number LBB4441/00

LBB 4442/00 Line Supervision Set

Master and slave PCB for supervisiing a single
loudspeaker line, the master is mounted in a Praesideo
network connected power amplifier (one per channel),
the slave is connected at the end of the loudspeaker
line.

Order number LBB4442/00

LBB 4443/00 End of Line (EOL) Supervision Board

Line supervision slave PCB for connecting to the end
of a loudspeaker line or the end of a spur, operates
with LBB4440/00 to monitor the integrity of the line.

Order number LBB4443/00

LBB 4440/00‑CN Supervision Control Board

Line and loudspeaker supervision master PCB for
mounting in a Praesideo network connected power
amplifier, one board is needed per channel, Chinese
version.

Order number LBB4440/00-CN

4 | PRS‑xPxxx and LBB 4428/00 Power Amplifiers

LBB 4441/00‑CN Loudspeaker Supervision Board

Loudspeaker supervision slave PCB for mounting on a
loudspeaker, operates with LBB4440/00 for
monitoring the integrity of the loudspeaker, Chinese
version.

Order number LBB4441/00-CN

LBB 4442/00‑CN Line Supervision Set

Master and slave PCB for supervisiing a single
loudspeaker line, the master is mounted in a Praesideo
network connected power amplifier (one per channel),
the slave is connected at the end of the loudspeaker
line, Chinese version.

Order number LBB4442/00-CN

LBB 4443/00‑CN End of Line (EOL) Supervision Board

Line supervision slave PCB for connecting to the end
of a loudspeaker line or the end of a spur, operates
with LBB4440/00 to monitor the integrity of the line,
Chinese version.

Order number LBB4443/00-CN

5 | PRS‑xPxxx and LBB 4428/00 Power Amplifiers

Represented by:

Americas: Europe, Middle East, Africa: Asia-Pacific: China: America Latina:

Bosch Security Systems, Inc.
12000 Portland Avenue South
Burnsville MN 55337, USA
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.com

Bosch Security Systems B.V.
P.O. Box 80002
5617 BA Eindhoven, The Netherlands
Phone: + 31 40 2577 284
Fax: [phone]
[e-mail]
www.boschsecurity.com

Robert Bosch (SEA) Pte Ltd, Security
Systems
11 Bishan Street 21
Singapore 573943
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.asia

Bosch (Shanghai) Security Systems Ltd.
201 Building, No. 333 Fuquan Road
North IBP
Changning District, Shanghai
200335 China
Phone [phone]
Fax: [phone]
www.boschsecurity.com.cn

Robert Bosch Ltda Security Systems Division
Via Anhanguera, Km 98
CEP 13065-900
Campinas, Sao Paulo, Brazil
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.com

© Bosch Security Systems 2013 | Data subject to change without notice
1863143051 | en, V17, 20. Nov 2013