SM40 Distribution and Surveillance Systems

Data Sheet

SM40 Distribution and

Surveillance Systems

■

Microprocessor control allows a wide variety of routing and switching operations to be executed quickly, efficiently and reliably

■

Monitors the status of PA system amplifiers, loudspeakers and cabling

■

Microprocessor control allows specific functions to be easily and speedily programmed by non-technical personnel

■

Rack-mounted Euro Card circuit boards make system expansion and alteration easy and economical

■

Basic System is self-contained in a 19 inch rack frame, fully wired, tested and ready for use

The SM40 Distribution System is developed to meet the demand for a comprehensive, yet simple to operate, sound distribution system. In such large public address distribution systems, which often play a role in alarm and evacuation installations, it is vital that the correct functioning of the various amplifiers and loudspeakers can be verified. Therefore, the

SM40 Surveillance System is designed to monitor the status of the amplifiers, loudspeakers and cables. Since it pinpoints any failures in the system, it saves a great deal of time, minimising the repair costs and ensuring that the system is fully functional at the earliest possible moment.

Being controlled by microprocessors, the systems are particulary flexible: all routing, switching and priority functions, and surveillance requirements can easily be programmed and changed by non-technical personnel. The Basic System is the heart of each system and is a fully working, selfcontained unit in its own right. If supplemented with a variety of circuit cards, a wide range of system configurations is possible and many different application needs are successfully met.

Distribution System

The Distribution Basic System is fed by professional microphones mounted on Call

Stations as well as auxiliary music sources.

Each Call Station contains up to 10 User

Keys, which can be programmed to route the microphone calls, digitally stored messages, attention tones or alarm signals to one or several power amplifiers. These amplifiers in turn, feed the loudspeakers located in the geographical and/or functional zones where people must be reached with background music, announcements or alarm signals.

Surveillance System

The Surveillance System is able to scan the presence of the pilot tone signal in monitoring devices, located at strategic places (at amplifier outputs, loudspeaker cabling junction boxes, inside loudspeaker enclosures) throughout a large distribution system. At detection of a malfunction, an error message is automatically generated, giving the precise time and location of the fault. It can also receive ‘internal error’ information from the system itself.

A maximum configuration of the

Surveillance System is able to sequentially scan 32 test lines, connecting up to 4,096 monitoring devices; receive error input from 11 external sources; and activate

32 relay sets.

LBB 1350, LBB 1370

Philips

Communication &

Security Systems

Table of Contents

1 INTRODUCTION

7

7.1

7.2

7.3

7.4

7.5

6

6.1

6.1.1

6.1.2

6.1.3

6.2

6.2.1

6.2.2

5.2.1

5.2.2

5.2.3

5.2.4

5.2.5

5.2.6

5

5.1

5.1.1

5.1.2

5.1.3

5.1.4

5.1.5

5.2

2

2.1

2.2

2.3

2.4

4

4.1

4.2

4.3

4.4

3

3.1

3.2

3.3

3.4

3.5

3.5.1

3.5.2

3.5.3

3.5.4

3.5.5

SURVEY OF THE BASIC SYSTEMS

Distribution Basic System

Extension Frame

Surveillance Basic System

Main Block Diagram

-

-

-

CALL STATIONS

Call Station (standard version)

Extended Call Station

Master Call Station

-

-

Alarm Station

Optional printed circuit boards

Key Sensing PCB

Microphone Amplifier PCB

Key Confirmation PCB

Communications PCB

Call Station Microphone Assembly

COMMON SYSTEM CARDS AND BOARDS

Interconnection Board

Termination Board

Display and Keyboard

Control Relay Card

-

-

-

-

-

-

-

-

CARDS FOR THE DISTRIBUTION SYSTEM


Input Card

Central Processor Card

-

Signal Generator Card

Matrix Card

Matrix Termination Board

Optional cards

Tone Control Card

Signal Processing Card

Automatic Volume Control Card

ANDAP application

Digital Message Card

I/O-PCB

-

-

CARDS FOR THE SURVEILLANCE SYSTEM


Central Processor Card + I/O

Pilot tone Generator Card

-

-

Surveillance Switch Card

Separate printed circuit boards

Loudspeaker Surveillance Board

Amplifier Surveillance Board

SPECIFICATION

General

Card Supply

Audio Signal Data

Call Station Characteristics

Audio Signal Level Diagram

2

PAGE 3

4

5

4

4

6

9

10

9

9

8

8

7

7

10

11

11

12

12

12

12

13

29

29

29

30

31

32

26

27

27

28

24

24

24

25

18

18

20

21

22

23

16

17

17

18

14

14

14

15

1.

INTRODUCTION

The SM40 basic unit is a self-contained, fully operational system into which all other SM40 circuit cards can be fitted. It can comprise up to 10 circuit cards, to be mounted in a single 19” rack frame. All the inputs of the circuit cards are protected against overvoltage and short circuiting.

The unit has a self-monitoring system for internal faults.

Both systems can be combined with amplifiers from the SQ45 range to form a sophisticated Public Address system.

Each Basic System can be expanded to a comprehensive system by applying extra circuit cards. A wide range of system configurations are possible and many different needs are successfully met.

When used as a starter Distribution Basic

System, it has a large range of possibilities for sound distribution, routing and switching. Used as a starter Surveillance

Basic System, it is capable to monitor the status of loudspeakers, amplifiers and cables in large sound systems.

All Basic System internal wiring is particularly installer friendly due to the use of the ‘quick fit’ connectors. Since the Basic

System is delivered fully wired, adjusted, tested, and mounted in a 19” rack frame, ready for use, it is an ideal base for large systems.

An Extension Frame is available to accommodate all the circuit cards when the quantity of required cards in the system exceeds the amount of space offered in the basic rack frame.

All the rack frames and the amplifiers can be fitted into a 19 inch rack cabinet.

3

2.

2.1

SURVEY OF THE BASIC SYSTEMS

DISTRIBUTION BASIC SYSTEM

The Distribution Basic System is fed by professional microphones mounted on Call

Stations as well as auxiliary music sources.

Each Call Station contains up to 10 User

Keys, which can be programmed to route the microphone calls, attention tones or alarm signals to the individual (or a combination of) power amplifiers. These amplifiers feed the loudspeakers located in the geographical and/or functional zones where people must be reached with background music, announcements or alarm signals.

If used in applications with minimal requirements, a maximum of 3 Call

Stations can be connected to the system. It is capable of controlling 8 amplifiers which in turn feed a maximum of 8 loudspeaker zones.

The Distribution Basic System comprises:

1x Single 19” rack frame

1x

1xIB

Power Supply +15V/-15V/+5V


2xTB

1xMTB

1xDK

1xCPC

Termination Boards


Display and Keyboard

Central Processor Card

1xCRC

1xIPC

1xSGC

1xMC

Distribution System Software

Control Relay Card

Input Card


Matrix Card

In a maximum configuration, the

Distribution System can accept (via a 16 x

64 matrix) up to 16 audio inputs to feed up to 64 individual amplifier inputs, or (via a 32 x 32 matrix) up to 32 audio inputs to feed up to 32 amplifiers.

Optional cards:

TCC

SPC

AVC

DMC

I/O

MTB

CRC

IPC

SGC

MC

TB

RTB

Tone Control Card




I/O-PCB


Control Relay Card

Input Card


Matrix Card

Termination board

Relay Termination board

Separate printed circuit boards are available to build a variety of stations:

ECS Extended Call Station

MCS Master Call Station

AST Alarm Station

Please refer to the description of the Call

Station for more information.

Optional units:

CST Call Station (standard version)

2.2

EXTENSION FRAME

This single 19 inch rack frame is capable of holding 10 SM40 circuit cards. It can be used in a SM40 system when the quantity of cards required, or the amount of

Termination Boards available, exceeds the amount of space offered in the Basic

System rack frame.

An Extension Frame comprises:


1x

1xIB

1xTB

Power Supply +15V/-15V


Termination Boards

LBB 1350/30

PE 1141/52

LBB 1377/00

LBB 1371/00

LBB 1352/30

LBB 1356/00

LBB 1351/00

LBB 1354/00

LBB 1355/00

LBB 1357/00

LBB 1358/00

LBB 1359/00-/09-/21

LBB 1378/00

LBB 1375/30

LBB 1371/00

LBB 1356/00

LBB 1351/00

LBB 1354/00

LBB 1355/00

LBB 1377/00

LBB 1379/00

LBB 9567/30

LBB 1360/30

PE 1113/50

LBB 1377/00

4

2.3

SURVEILLANCE BASIC SYSTEM

A pilot tone signal is generated which is inserted into the Test inputs of the Philips

SQ45 power amplifiers series. The

Surveillance System is able to scan the presence of this signal in monitoring devices, located at strategic places (at amplifier outputs, loudspeaker cabling junction boxes, inside loudspeaker enclosures) throughout a large distribution system.

The Surveillance Basic System comprises:


1x

1x

Power Supply +15V

Power Supply +15V/-15V/+5V

1xIB

4xTB

1xCPC


Termination Boards

Central Processor Card +I/O

Surveillance System Software

1xCRC

1xSSC

1xPGC

Control Relay Card



On detection of a malfunction, an error message is automatically generated, giving the precise time and location of the fault.

The message can either be relayed to the

LCD display of the system, or sent to either a personal computer or an external printer for a permanent hard copy record of the malfunction. The message can also be linked to warning lamps, buzzers, or personnel paging units to alert security and maintenance personnel. Even the possibility exists to switch-in automatically a standby amplifier in place of an amplifier which becomes faulty.

Optional cards:

CRC

SSC

PGC

TB

Control Relay Card



Termination Board

Optional separate printed circuit boards:

LSB Loudspeaker Surveillance Board

ASB Amplifier Surveillance Board

External sensors, such as smoke detectors and micro switches, can also be connected to the system, which in turn can activate the relays on the Control Relay Card.

If the Basic System becomes faulty itself, an

‘internal error’ message is generated.

Normal two core screened microphone cable can be used to carry the data and power between the system and the interlinked Amplifier and Loudspeaker

Surveillance Boards.

Being supplied with 1 Surveillance Switch

Card, the Surveillance Basic System is able to scan 8 separate test lines, each linked to

(up to) 128 Amplifier and/or Loudspeaker

Surveillance Boards. It is also able to display error information generated by

3 external sources.

A maximum configuration of the

Surveillance System is able to sequentially scan 32 test lines connecting up to 4,096 monitoring devices; receive error messages from 12 external sources; and activate

32 relay sets.

LBB 1370/30

PE 1268/10

PE 1141/52

LBB 1377/00

LBB 1356/00

LBB 1374/00

LBB 1369/00

LBB 1356/00

LBB 1374/00

LBB 1369/00

LBB 1377/00

LBB 1367/00

LBB 1368/00

5

2.4

MAIN BLOCK DIAGRAM

1 2 3 4 5

6 7

8

9 1 0

Call station

1

2

3

Amp. No.1

Audio

Override

Test

SQ45

2

LSB

1

2

AUX: Radio, music cassette recorder etc.

ASB

DK

1

2

3

4

IPC

3

4

1

2

I1C

Supply

SGC

.

.

.

1

+15/-15/+5V

PS

1 2 3 4 5 6 7 8

1

2

3

4

MC

1 2 3 4 5 6 7 8

L/U

CRC CPC


External

Error

Inputs

1 2 3 4 5 6 7 8

1

2

3

SSC

1 . . . .

.

1 6

PGC

+15/-15/+5V

PS

+15V

PS

DK

I1C

Communication

Supply

1 2 3 4 5 6 7 8

L/U

CRC

CPC I/O

RS 232

To max.

128 ASB/LSB

To error indicator etc.


8

6

3.

3.1

CALL STATIONS

CALL STATIONS - CST (STANDARD VERSION)

Main data

■

Part of the Distribution System

■

■

High quality microphone

Pre-set gain control with built-in limiter

■

■

Bass rolloff-filter

10 User Keys

Correlation with other cards

Input : -

Output: Input Card

Others: -

Max. number of stations in the system

15 Call Stations when a 16x64 matrix is used.

31 Call Stations when a 32x32 matrix is used.

If music inputs and/or Signal Generator

Cards are used in the system, less stations can be connected.

The Amplifier in the Call Station has a double function. It provides the call station microphone with a 60 Ohm (balanced) line level output, enabling it to use a normal 2 core twisted screened microphone cable with a length of up to 1,000 metres.

Furthermore, it generates the User Key address code.

The volume level is controlled by a limiter and each Call Station has a volume level pre-adjustment.

The bass rolloff-filter slope may be increased to aid clarity when the caller is forced to speak close to the microphone because of high background noise.

An announcement signal normally mutes any music being fed to the called zone, but

LBB 9567/30

the facility exists to merely reduce the music volume with -10 dB while the announcement comes through at full volume.

To meet specific user requirements, special call stations can be built with separate printed circuit boards. These boards can be mounted into cabinets or desks and other suitable enclosures. The following are available for these applications:

CSA Call Station Microphone Assembly

MAP Microphone Amplifier PCB

KSP Key Sensing PCB

KCP Key Confirmation PCB

Red

‘Busy’

Green

‘Wait/Talk’

Operation

This standard Call Station is a desktop model, provided with a high quality microphone mounted on a goose-neck.

Microphone

Bass

Roll-off

Filter

Zone clear/busy detection

A Keyboard is available for selecting the following User Key functions: Key Priority,

Signal Tones plus pre-recorded messages and Routing. These functions are programmed in the microprocessor and can be activated by pushing just one of the push buttons.

Key Priority Level can be set to give each key a priority of 0-9 to cope with conflict situations (e.g. two stations attempting to call the same zone simultaneously). The caller with the highest priority (9) overrides any lower priority callers and they are warned of this status by the ‘busy’ LED.

Signal tones are available to precede an announcement (attention tones).

Depending on their character, however, they may be used as alarm or test tones.

Prerecorded messages: see also chapter

5.2.5 Digital Message Card.

Routing assigns a User Key to one or more amplifiers which feed the loudspeakers in geographical or functional zones.

Preset

Comp./

Limiter

Keyboard

Two Led Indicators are mounted in the front panel to advise the user whether the selected zone is clear to call. The green

LED is titled ‘wait and talk’ and the red

LED ‘busy’.

7

3.2

EXTENDED CALL STATION - ECS

Main data

■

Built-up with separate PCBs

■

■

Same functions as standard Call Station

50 User Keys maximum.

Operation

A standard Call Station has 10 User Keys.

If you want more User Keys an Extended

Call Station can be assembled.

Busy Wait/Talk

MAP

10 9 8 7 6 5 4 3 2 1

LBB 1364/00

LBB 1363/30

1 2 3 4 5 6 7 8 9 10

KSP 0

LBB 1363/30

In this type of station up to 5 Key Sensing

PCBs may be connected to 1 Microphone

Amplifier PCB. The station operates in the same way as a standard call station, but has

50 User Keys.

A maximum of 4 Extended Call Stations may be used in the Distribution System, resulting in a maximum of 200 User Keys.

11

LBB 1363/30

41

20

KSP 1

50

KSP 4

IPC

IPC

IPC

3.3

MASTER CALL STATION - MCS

Main data

■

Built-up with separate printed circuit

■ boards

10 Activation Keys for chime and

■

■ priority/talk keys

90 Pre-selection User Keys for zone/zone-group selection

Key confirmation indication lights

Busy Wait/Talk

LBB 1364/00

MAP

10 9 8 7 6 5 4 3 2 1

Operation

In a Master Call Station, there is the possibility to pre-select the loudspeaker zone to be called.

In this type of station, the first Key Sensing

PCB and the Microphone Amplifier PCB are the activation section.

The keys can be used in two modes. In the separate mode, keys 1-5 are used as

5 chime selection keys, keys 6-9 as priority/talk keys and key 10 as a reset key.

In the combined mode, keys 1-9 are used as a combination of chime/priority keys and key 10 as reset key.

The other Key Sensing PCBs are the preselecting section, consisting of up to 9 Key

Sensing PCBs with 90 User Keys.

By using a Key Confirmation PCB, or the

I/O PCB it is possible to indicate the preselection User Keys which are at that moment active. A LED or a built-in indication light, powered with a separate power supply, acts as an indicator.

Chime keys

Priority/ talk keys

Reset

1 2 3

LBB 1363/30

4 5 6 7 8 9 10

KSP 0

IPC

1 2 3

LBB 1363/30

4 5 6 7 8 9 10

KSP 1

81 82

LBB 1363/30

LBB 1365/00

90

KSP 9

KCP

Supply

IPC

IPC

CMP

8

3.4

ALARM STATION - AST

Main data

■

Built-up with separate PCBs

■

Activated by 10 individual remote make contacts

Operation

In an Alarm Station the Key Sensing PCB can be used to activate alarm tones. Instead of using the keys on the board for a call, individual make contacts can be connected to the board. These contacts may be remote contacts from smoke-detectors, a security system, etc.

LBB 1363/30

KSP

IPC

1 2 3 4 5 6 7 8 9 10

Remote Switches

3.5

OPTIONAL PRINTED CIRCUIT BOARDS

3.5.1

KEY SENSING PCB - KSP

Main data

■

Separate PCB with 10 buttons to

■

■ expand the number of User Keys

Key detection and switching

Board dimensions 4 x 18 cm

Correlation with other cards

Input: Microphone Amplifier PCB

Closed/open contact of a detector

Output: Input Card

Others: Central Processor Card

Operation

This separate board has 10 User Keys and it informs the Central Processor Card which User Key is being pressed, so that the call-signal from the Microphone

Amplifier PCB can be routed to the programmed zone.

The buttons can be mounted onto the board in 2 blocks of 5 buttons or connected via a flat cable for remote control purposes.

To allow key sensing of the board, the

ON/OFF master switch located on the

Microphone Amplifier PCB can be set in the ‘active’ or ‘non-active’ mode by means of a jumper.

Key Sensing PCBs can be used in Extended

Call Stations, Alarm Stations or Master

Call Stations.

MAP

1 2 3 4 5 6 7 8 9 10

User keys

Remote buttons

Key detection

&

Switching

IPC

LBB 1363/30

9

3.5.2

MICROPHONE AMPLIFIER PCB - MAP

Main data

■

Separate PCB to be used as microphone

■ amplifier in Extended Call Stations or

Master Call Stations


Correlation with other cards

Input: Microphone

Key Sensing PCB

Output: Key Sensing PCB

Operation

This board contains a bass rolloff-filter, a compressor limiter and a volume control, but it differs from the amplifier board used in the standard Call Station on the following points.

Phantom powering is available, so that both a dynamic microphone and a condenser microphone can be used. A switch is mounted for selecting either balanced or unbalanced microphone inputs.

Balanced

Unbalanced

Additional soldering pins are mounted for connecting a VU-meter or a headphone.

Master ON/OFF key-switch contacts

(make contact) and telephone handset

LBB 1364/00

To headphone Busy Wait/Talk

Limiter

KSP 9

KSP 2

KSP 1

KSP 0 cradle switch contacts (break contact) are available to enable key sensing. These key sensing functions can be set in the ‘active’ or ‘non-active’ mode by two jumpers on the corresponding Key Sensing PCB.

3.5.3

KEY CONFIRMATION PCB - KCP

Main data

■

Separate PCB to indicate (e.g.

■ illuminate) the currently active User

Keys in a Master Call Station



Input: Communications PCB

Output: Indicator, e.g. LED or lamp


Operation

To show which User Key is currently active, it is possible to use an illuminated button or a LED indicator which can be activated via this board. After detection by the Central Processor of the activation of a

User Key, a signal is sent via the

Communications PCB to the Key

I/0 PCB address

P

Buffers Drivers

LBB 1365/00

1

88

+15V/+

Confirmation PCB which in turn powers the relevant LED or light.

A maximum of 4 boards may be used in the system to activate up to 160 indicators.

Note: Because of the amount of the power used by the LEDs or lights, a separate power supply (+15V or +5 V) has to be used.

3.5.5

CALL STATION MICROPHONE ASSEMBLY - CSA

Main data

■

Part of a Call Station

■

Microphone with goose neck

Correlation with other parts

Input: -

Output: Microphone Amplifier PCB

Others: -

Operation

This assembly can be used to build your own Call Station.

It comprises of a high quality cardioid microphone and a flexible ‘goose neck’ with a mounting base.

10

LBB 9560/30

4.

4.1

COMMON SYSTEM CARDS AND BOARDS

INTERCONNECTION BOARD - IB

Main data

■

Board in the Basic System to

■ interconnect 10 SM40 Eurocards

Eurocard a+b connectors (2x32 poles)

Operation

An interconnection board provides the system with both reliability and a great deal of flexibility. Each connector on the board is the same, so that the SM40 cards may be located in the most convenient order within the frame.

connector pins on the rear side of the board. The interconnection between the

Interconnection Board and the

Termination Boards is also accomplished using flat cables fitted with female connectors.

The power supply and the reference signals common to all of the circuit cards, is linked via a rail system on the board. Since the system has such a wide range of configuration possibilities, cross-wiring between the circuit cards is necessary. This is easily accomplished by terminating the individual wires or flat cables with female connectors, which can be pushed onto the

To allow for certain contacts of adjacent cards to be joined together, connector blocks (2 x 8) have been added between the

10 connectors. Soldering is not to be carried out using small jumper plugs.

It should be noted that in the maximum system all cards controlled by the Central

Processor Card must be mounted in the first 6 frames.

4.2

TERMINATION BOARD - TB

Main data

■

Board in the Basic System for

■ connecting external wiring

2 x 16 screw block connector

Operation

The connections between the system and the peripheral equipment are linked via the

Termination Board.

Each Termination Board is connected to the Interconnection Board by a flat cable and/or individual wires fitted with female connectors.

LBB 1377/00

The screw connector blocks are plugged into sockets mounted on the board. This has the advantage that, if for any reason a system rack frame or a termination board has to be removed, the screw connector block can be simply unplugged leaving the peripheral equipment wiring intact.

4.3

DISPLAY AND KEYBOPARD - DK

Main data

■

Mounted in the front panel of the Basic

■

■

System

24 key keyboard

2 x 40 character LCD display

Operation

Users of an SM40 system can program and change the functions of their system quickly by means of the Display and

Keyboard.

The unit can be flipped until it locks in the horizontal position to have a good access to the keys and a good view on the display.

Depending on the software, the keys have different functions in the Distribution and

Surveillance System.

11

4.4

CONTROL RELAY CARD - CRC

Main data

■

Card in the Distribution and

■


Eurocard 10x22 cm with an ‘ab’

■

■ connector 2x32

8 Make and 8 break contacts

Relays to be activated by the Central

Processor Card


Input: -

Output: Termination Board


From

CPC

Yellow LED

Decoder

Address select

Control circuit 1

5

6

7

2

3

4

Control circuits

2 to 7

Control circuit 8

1

Relays 2 to 7

8

LBB 1356/00

Out

Out

Out

Max. number of cards in the system

Surveillance System: up to 5 cards

Distribution System: up to 4/8 ‘locked’ cards and 12/8 ‘unlocked’ cards

Operation

This card has 8 ‘make’ and 8 ‘break’ contacts which are activated by the Central

Processor Card. The function switch

‘locked’ or ‘unlocked’ determines the operation of this card.

Out

In the Distribution System the make contacts of the ‘locked’ cards are used to activate the loudspeaker volume control override relays and the break contacts to activate the ‘priority’ inputs of the SQ45 amplifiers. When an announcement or alarm is routed to a zone, the call or alarm signal will now be allowed to come through at its full level.

In this situation, each pair of the make and break relays is locked to one of the 8 outputs of the column. When a call or alarm signal is routed to that output, these relays will be automatically activated.

In the ‘unlocked’ situation, a number of extra functions become available to activate some of the relays, for system error indication, time related switching and routing, call stations busy etc.

In the Surveillance System the ‘make’ and

‘break’ contacts are used to switch on remote warning lights and buzzers or to activate a personal pager, etc. This feature is of great importance in situations where system faults must be clearly indicated and quickly investigated.

In the ‘locked’ situation, the card indicates errors on the corresponding Surveillance

Switch Card test lines, so each relay indicates an error in its ‘locked’ zone.

In the ‘unlocked’ situation the card gives a number of useful error indications such as: system error, ASB or LSB error, external error and printing error.

The Control Relay Card position in the system and the way in which it relates to the Matrix Card columns, is defined by an

‘address’ accomplished by jumper setting on the card.

12

5.

5.1

CARDS FOR THE DISTRIBUTION SYSTEM

OPTIONAL PRINTED CIRCUIT BOARDS

5.1.1

INPUT CARD - IPC

Main data

o Card in the Distribution Basic System o Eurocard 10x22 cm with an ‘ab’ connector 2x32 o 4 Inputs and outputs for Call Stations and/or Key Sensing PCBs o Phantom powering to microphones o User Key detection o Amplifier gain preset from -10 to 0 dB


Input: Call Station

Key Sensing PCB

Output: Matrix Card


Tone Control Card




8 Input Cards

Operation

This card usually interfaces Call Stations with the Distribution System and provides each station with:

■

■

■

Microphone phantom powering

Information for LED indication

User Key detection

User Key detection is available for up to 10 keys which allows the Central Processor

Card to detect the User Key being pressed on a particular Call Station. By coupling

Input Cards, a Call Station can be extended to accept up to 50 user keys for extended call stations or even up to 100 user keys for master call station. User Keys can also be used without the ‘call’ facility to activate alarm tones and are then called

Alarm Stations.

Each Input Card can be recognised by the

Central Processor Card via an ‘address’ accomplished by jumper setting on the card.

Presetting of the amplifier gain is possible from -10 to 0 dB.

A short circuited input will not effect the other ones.

IN 1

Inputs 2-3

IN 4

Encoder

Decoder

-10 to 0dB

Gain pre-set

-10 to 0dB

Yellow

LED

Gain pre-set

OUT 1

OUT 4

LBB 1351/00

Outputs 2-3

From CPC

13

5.1.2

CENTRAL PROCESSOR CARD -CPC

Main data

■

Card in the Distribution Basic System

■

Eurocard 10x22 cm with an ‘ab’ connector 2x32

■

Microprocessor controls via the I

2

C bus up to:

15/31* Call Stations

64/32* Loudspeaker circuits

■

320 User Keys

1024 Matrix points

256 Relays

8 Signal Generator Cards

16 Digital Message Cards

RAM memory 32k

Display buffer

X-tal

5,068 MHz

Proc.

Z80 B

EPROM

32kB

RAM

32kB Interface

LBB 1352/30

Databus

Addressbus

Controlbus

I/O PCB optional PCB

* dependent on matrix configuration

Options

■

I/O - PCB LBB 1375/30

Real time clock

X-tal

32,768 kHz

Clock data

Clock data

Clock data

Clock data

Clock data

Clock data

6

5

4

3

2

1 to extension frames

Operation

The Central Processor Card is the heart of the Distribution System and the basic functions are as follows.

To all cards

Detection of User Keys in a Call Station.

The card senses, in combination with the information given by the Input Card, which User Key has been pressed.

Routing the signals from the Input Cards via the Matrix Cards to the loudspeakers located in geographical and/or functional zones.

User Key priority level setting. When 2

Call Stations attempt to call the same zone simultaneously, a priority selection has to be made. To cope with these conflict situations, each User Key is given a priority level of 0-9 (9 is the highest priority).

Attention Signal Tones, selected by using this card, are coupled with the User Keys.

When a key is pressed the tone will be broadcasted before an announcement or, dependent on their character, broadcasted as attention, alarm or test signal.

Switching of the loudspeaker volume control override circuits, and bypassing of the input attenuators in the SQ45 amplifiers via the Control Relay Card.

Also switching of the amplifier outputs for loudspeaker group switching, via ‘unlocked’

Control Relay Cards.

Checking of the system hardware. The processor is continuously guarding the system hardware for errors, malfunctions or disconnections. If a problem has been detected, a message will be displayed on the screen of the Display and Keyboard unit.

Real time clock functions. The date, hours and minutes are displayed on the screen of the Display and Keyboard unit. A timer facility is coupled to the clock making it possible to switch on and route signals, prerecorded messages, music, etc. at specific times of the day or week. Synchronisation of the real time clock is possible.

Programming of the microprocessor by the user has to be done via the Display and

Keyboard unit. Having entered your password, you can change the programme.

Digital Message Card control allows you to record up to 16 x 65 seconds of speech.

Additional driver stages are mounted on the card for the I

2

C bus of up to

5 Extension Frames. Therefore, all circuit cards controlled by the Central Processor

Card must be mounted in the first 6 rack frames.

The optional I/O PCB can be used to pass information from the Key Confirmation

PCB in a Master Call Station to indicate which keys are currently active. It can also be used to communicate via a standard

RS232 port with a computer.

14

5.1.3

SIGNAL GENERATOR CARD - SGC

Main data

■


■

Eurocard 10x22 cm with an

‘ab’ connector 2x32

■

■

■

Test, chime and alarm tone generator

Pre-programmed with over 70 signals

Signals to be activated by the Central

Processor Card

P.S.U.


Output: Matrix Card


ATTN

Alarm

LEDs

Green

Green

Green

Yellow

Red

LBB 1354/00

Processor

Yellow

CPC

LED

Card select

Signal select

From

CPC

Activate

ÀÀÀÀÀÀÀÀ generator


8 Signal Generator Cards.

Output

Sound chip

Audio signal

Operation

This card enables the user to select signals from a wide variety of tones and chimes and route them to the loudspeakers zones.

The generator is controlled by a central processor and is pre-programmed with over

70 different signals, chimes, alarms and test tones. Any signal may be programmed to precede an announcement from a Call

Station or may be used on its own, depending on its character, as an alarm or warning tone. The timer on the Central

Processor Card can activate signals at specific times of the day or week.

The selection of the signal set is done by means of the jumper setting:

Set I Chime tones and alarm signals

Set II Test signals

Set III Chime tones and dedicated

German alarm signals

Signals of set II are used during installation and for service purposes.

The volume level of the alarm signals and the other signals can be pre-adjusted separately.

The card can be recognised by the Central

Processor Card via an ‘address’ accomplished by a jumper setting on the card.

A headphone may be connected to the

6.3 mm jack socket on the front of the card to hear the signals generated.

15

5.1.4

MATRIX CARD - MC

Main data

■


■


■

■

■

Matrix 4 in - 8 out (4x8)

Additional cards can be installed to create up to a 16x64 matrix or a 32x32 matrix

Switching is activated by Central

Processor Card

INPUT

1

2

3

LBB 1355/00

1

From other matrix outputs

2 3 to 8


Input: Input Card


Signal Processor Card


Tone Control Card


Auxiliary

Output: Signal Processor Card

Tone Control Card


Direct to amplifier input

Other Matrix Card


4

Balanced/ unbalanced jumper

-10 dB

Yellow

LED

1 2

Decoder

Matrix outputs

From

CPC

Selector

3 to 8


Up to 32 cards may be connected together.

Operation

This Matrix Card enables inputs of the

Distributions System to be routed to loudspeakers, located in geographical and/or functional zones, where people must be reached with background music, announcements and alarm signals.Each

Matrix Card switches the 4 line level audio inputs to any or all of its 8 outputs. Each input has a jumper for selecting balanced or unbalanced input signals.

The 4-th input of the Matrix Card has a programmable switch to attenuate the music signal by 10 dB when a Call Station is routed to the same loudspeaker zone.

In a larger matrix, addressing of the cards via jumper setting is necessary to create a large number of routing configurations.

With the maximum of 32 Matrix Cards the following matrix configuration can be made.

16x64 matrix:

32x32 matrix:

-10 dB

3 to 8

16 audio inputs to

64 audio outputs.

32 audio inputs to

32 audio outputs.

5.1.5

MATRIX TERMINATION BOARD - MTB LBB 1371/00

Main data

■

Board in the Distribution Basic System

■

■


8 galvanic separation transformers can be mounted

Operation

A Matrix Termination Board can be used to suppress any small clicks which may occur when the outputs from the Matrix

Card have been wired directly to an amplifier.

5.1.6

SM40 RELAY TERMINATION BOARD

Main data

■

Board in the Distribution Basic System

■

Installed in place of a normal termination board

■

■


8 relays to be activated by the make contacts of the eight relays on a Control

Relay Card (CRC).

■

Power supply for relays (+15V and -

15V). Supplied internally from SM40 power supply.

Operation

This card will be used in an SM40 PA system to route the 100 volt audio output of a call and music amplifier to a maximum of eight loudspeaker zones. The card is therefore equipped with eight relays to be activated by the make contacts of the eight relays of a Control Relay Card (CRC) in an SM40 system which in turn can be activated by programming the system.

If encountering the distribution effects of an earth loop, up to 8 transformers may be mounted which isolate the earth (ground) of the input source equipment from that of the system.

LBB 1379/00

16

5.2

OPTIONAL CARDS

5.2.1

TONE CONTROL CARD - TCC

Main data

■

Card for the Distribution System

■



■

■

■

■

4 Individual tone control circuits

Bass and treble correction from -10 to

+10 dB

Gain correction of +/- 10 dB

Additional input selection for a splitter function

IN1

IN2 input selector

Tone control

10dB

Red

LED

LBB 1357/00

OUT 1

OUT 2


Input: Matrix Card

Input Card

Auxiliary source

Output: Amplifier input

Matrix Card

IN3

IN4

OUT 3

OUT 4


No limitation.

COMM

Bass Treble

600 Hz

Operation

This card can be very useful in situations where clarity of speech is vital and room acoustics make this difficult to attain.

Several applications are possible between the following cards, such as Input Cards outputs and Matrix Cards inputs; Matrix

Cards outputs and Amplifier inputs.

It has 4 independent tone control circuits, each having individual inputs and outputs.

Each circuit has a separate bass and a treble amplification and attenuation to a maximum of 10 dB.

At the input of each circuit a screw-driver preset control is installed for adjusting the gain from -10 to +10 dB.

The card will accept a balanced or unbalanced source without any loss of sensitivity.

±10dB gain

The card has an extra ‘common’ input which acts as a splitter and it allows the card to be fed by a single source instead of the 4 independent ones.This is particulary useful when several amplifiers are required to operate from 1 matrix output.

5.2.2

SIGNAL PROCESSING CARD - SPC

Main data

■


■


■

■

■

Filter combination channel with 3 parametric filters and adjustable -15 dB bass cut

Compressor/limiter channel with ratio adjustable from 1:3 to 1:20

Cascade of both channels possible

Filter input


Input: Matrix Card

Input Card

Auxiliary source



Matrix Card

Comp./ limiter input

800Hz 1600Hz 3200Hz

15dB

Bass cut filter

‘Q’ filter

‘Q’ filter

Interconnection via jumper plugs or interconnection board

0dBV

-10 to +10dB pre-set

‘Q’ filter

Comp Release Limiter ratio

T.hold

time slope

Compressor/limiter

LBB 1358/00

Filter output

Comp./ limiter output

0dBV

17


Only limited by space and by the DC power supply available in the rack.

Operation

This card has a filter combination channel which functions as an equaliser to improve the intelligibility of spoken messages. It also has a compressor/limiter channel that evens out variations in signal level, making external inputs such as CD or cassette players ideal as background music sources.

The card may be used between music source output and Matrix Card input,

Matrix Card output and Amplifier input, in combination with an Automatic Volume

Control Card, etc.

The output of the filter channel may be fed into the input of the compressor/limiter channel and enables it to operate as one channel. Both channels are electrically balanced, but will accept unbalanced sources without any loss of sensitivity.

The filter combination channel has a bass cut and 3 parametric filters with fixed centre frequencies.

The gain of the bass cut-filter (high pass) is adjustable to a maximum of -15 dB at

100 Hz, sloping to 0 dB at 1,000 Hz.

The 3 parametric filters have centre frequencies fixed at 800, 1,600 and

3,200 kHz, but a simple modification allows these frequencies to be altered. The gain at the centre frequency of each band is adjustable to a maximum of +/- 10 dB.

The ‘Q’ factor slope (width) of each band can be adjusted to match differing irregularities in the frequency curve.

A red LED indicates the 0 dBV level at the output.

The compressor limiter channel can be adjusted for a compression ratio from 1:3 to a maximum of 1:20. If the ratio is adjusted to 1:20, the channel will act as a limiter restricting the maximum output to a preset level. The attack time of the compressor is factory set at 1 msec, but the release time is adjustable between 40 ms and 4 seconds.

The preamplifier gain is adjustable to a maximum of 20 dB.

A red LED indicates the 0 dBV level at the input.

5 dB

32 63 125 250 500

1600 Hz. Minimum ‘Q’; various gain settings.

5 dB

1k 2k 4k 8k 16k 32kHz

32 63 125 250 500

1600 Hz. Max. and min. gain; various ‘Q’ factors.

1k

5 dB

2k 4k 8k 16k 32kHz

32 63 125 250 500 1k 2k 4k

8000 Hz, 1600 Hz, 3200 Hz. Max. and min. gain; at max. ‘Q’; max. bass cut.

10 dB

8k 16k 32kHz

32 63 125 250 500 1k 2k 4k 8k 16k

800 Hz, 1600 Hz, 3200 Hz. Max. gain; max. ‘Q’ with various bass cuts; min. ‘Q’ with max. bass cuts.

32kHz

18

5.2.3

AUTOMATIC VOLUME CONTROL CARD - AVC

Main data

■


■



■

■

■

2 Independent automatic volume control channels

Sensing microphone required

Automatic Noise Dependent Audio signal Processing (ANDAP) possible when combined with a Signal

Processing Card

In

Out

From matrix

From sensing microphone

In

Max call level

Min call level

Sense gain

J3

Max call level


Input: Sensing microphone

Matrix Card


In

Out

From matrix

In

Min call level

General

The Automatic Volume Control card is available in three different versions:

- LBB 1359/00 with an audio gain control range of 45 dB.



From sensing microphone

Sense gain

J7

It is necessary to adjust the Automatic

Volume Control Card on site to conform to the local conditions.

J2

N x 3dB steps 0 dBV

J1

Blocking

R7

LBB 1359/00 - /09 - /21

J6

A/D

LIN/

LOG

N x 3dB steps 0 dBV

J5

Blocking

R7

A/D

LIN/

LOG

To callinput of the amplifier

To callinput of the amplifier

Operation

In environments such as football stadiums and airports, the background noise level fluctuates constantly. This card maintains the volume at a constant level above the background noise. It works by continually measuring and adjusting the volume.

The sensing microphone, in position in the listening environment concerned, provides the input for the card. The circuit samples the background noise level, except during calls so therefore the system gain is not reacting on his own calls. The sampling is blocked during the actual call signal, but resumes during speech pauses. The circuit continuously varies the output volume to compensate for changes in ambient noise level.

The card is normally placed after a Matrix

Card, so that it can be used to effect two loudspeaker zones.

Each channel has preset potentiometers for the sense level (adjustment of the microphone sensitivity), the maximum boosted signal gain and the sense mute threshold level.

A red LED indicates the 0 dBV level output.

19

5.2.4

AUTOMATIC NOISE DEPENDENT AUDIO SIGNAL PROCESSING - ANDAP

Main data

■

Combining an Automatic Volume

Control Card and a Signal Processor

Card makes an ANDAP function possible.

Filter compressor limiter

Operation

The ANDAP function is useful wherever the system power is not sufficient to overcome environmental noise and thus ensure intelligibility. The ANDAP function boosts the high frequencies, and then compresses the dynamic range of the signal in order to project a clearly audible message without the need for extra power.

It operates as follows.

a. Sampling the ambient (background) noise (see upper graph).

b. Comparing it with the normal amplified speech signal (see upper graph). The dynamic range is shown by the upper line and lower line.

c. When the noise level increases, the AVC function increases the level of the

‘normal’ speech signal to approx 90 dB

(SPL) in the 300 to 800 Hz range (see middle graph).

d. When the noise level increases to an extreme level, the most important frequencies for speech intelligibility are masked out, especially at the lower end of the dynamic range. To overcome this problem, ANDAP produces a

‘processed’ signal which has a reduced dynamic range and a shift in the maximum available loudness (90 dB) to between 500 Hz and 2 kHz (see lower graph). This has the effect of emphasising those frequencies which are most relevant to speech intelligibility.

e. The amount of the ‘processed’ signal added to the original is determined by an integrated regulating facility.

Audio in

Sens micr.

1 / AVC

Audio out

30

20

10

60

50

40

SPL (dB)

90

80

70

32

20

10

0

60

50

40

30

SPL (dB)

90

80

70

32

Speech signal

Ambient noise

63 125 250 500 1000 2k

Speech signal

Ambient noise

63 125 250 500 1000 2k

SPC

4k 8k 6kHz

4k 8k 6kHz

Normal conditions

Dist. limit

Noisy conditions controlled by AVC

50

40

30

20

10

0

SPL (dB)

90

80

70

60

32

Ambient noise

63 125 250 500 1000 2k 4k 8k 6kHz

Dist. limit

Processed speech signal

Extra noisy conditions controlled by ANDAP

20

5.2.5

DIGITAL MESSAGE CARD - DMC

Main data

■

Optional card for the Distribution

■

System

Eurocard 10x22 cm with an ‘ab’

■ connector 2x32

Digital recording of 7 individual messages during 65 seconds recording time

■

■

■

■

■

Typical data retention time more than

30 days

Stand-alone use possible for remote location recording

Contains circuits for automatic gain and output volume control

ADPCM technology

Bandwidth up to 6 kHz

Playback

Micro PreAmpl.Compr.

Rec.

Low pass

I/O in out

ADPCM

Processor

RAM

LBB 1378/00

Headhone

Line out

Micr.

out


Input: Call Station

Separate microphone

Output: Matrix Card



16 cards.

Operation

This unique card allows up to 7 individual messages to be recorded and played back as desired.

The recording is digitally stored in memory chips, ensuring that the quality will not deteriorate during the time that the message is stored in memory. When the power is switched off, the messages will remain intact in the memory for up to 30 days.

The maximum recording time is

65 seconds and messages of varying durations may be recorded, as long as the sum of the durations does not exceed the maximum recording time (65 seconds).

To record a message a separate microphone or a Call Station can be connected to the microphone input (5 pole, 180° DIN socket), which also provides the possibility of phantom powering.

Since the record and monitor functions of the card are independent of the microprocessor in the system, the card may be taken out and transported to a remote location. With the aid of a suitable power supply and some extra switches, the card may be used to record the messages in a more suitable or convenient environment.

To play back the message(s) either alone or preceding a call, the system can be programmed so that play back will be activated by a Call Station or a User Key.

A headphone socket allows the recorded messages to be checked both during and after recording.

The limiter in the automatic gain control circuit ensures that the message is recorded at a fairly constant level. The output volume level is adjustable to the same values of those of the other system sources

(attention signals, music sources, etc.).

Each card can be recognised by the Central

Processor Card via an ‘address’ accomplished by jumper setting on the card.

21

5.2.6

I/O-PCB

Main data

■

To be mounted onto the Central

■

Processor Card

RS232 serial interface for

■ communication link with a computer

One wire asynchronous communication line for use in a Master Call Station

LBB 1375/00

Databus

Address bus

Control bus


Input: Central Processor Card

Output: Key Confirmation PCB computer, printer, etc.

Others: -

UART UART

Operation

When mounted on the Central Processor

Card in the Distribution System, this PCB allows communication via a standard

RS232 serial interface with external computer equipment. It also controls the

Key Confirmation Keys indicators in the

Master Call Stations and acts in the same way as the Communication PCB.

RS 232

To operate the communications link, a simple communication programme must be provided on the computer. A password is required to allow communication with the system.

Depending on the software applied, the computer can be used in the passive or active mode.

In the passive mode you can read or record the ‘static’ information

(system configuration, sources connected) and the ‘dynamic’ information (call logging, auxiliary routing, failure information).

In the active mode you can use the computer for up/down loading of the programme, to program the matrix or even to operate as a Call Station or Master Call

Station.

Communication line to KCP

Remarks

The optional I/O-PCB set comprises:

- printed circuit board

- RS232 connector, fitted to a mounting bracket

- EPROM (version 5.*) with Distribution

System + I/O software

- All necessary cables, connectors and mounting parts

- Programming instructions

- All output signals are optically

22

6.

6.1

CARDS FOR THE SURVEILLANCE SYSTEM

SURVEILLANCE BASIC SYSTEM

6.1.1

CENTRAL PROCESSOR CARD + I/O - CPC

Main data

■

Card in the Surveillance Basic System

■



■

Microprocessor capability:

4,096Monitoring devices to be scanned sequentially

80 Relays to be activated

■

Error information to be sent to an external device via a standard RS232 port

Operation

This card is the heart of the Surveillance

Basic System and the basic functions are as follows.

Scanning the Amplifier Surveillance Boards and Loudspeaker Surveillance Boards by sending sequentially +15 V power to each of the 8 test lines of the Surveillance Switch

Cards, which in turn sequentially send and receive data back to and from each board on each line. Priority scanning of the first and second zone is possible by programmable time intervals.

Translating the error data received from the various surveillance boards or from the external sensing devices and sending this information to the Display and Keyboard unit or via the RS232 port to a printer or external computer.

Activating of the relays on the Control

Relay Cards which in turn switch-on external warning devices (lights, buzzers, paging units, etc.).

Checking of the system hardware by continuously monitoring the system to check for errors, malfunctions or disconnections.

The presence of the Real time clock provides a continuous display of the date, hour and minutes and sends the date and time to a printer when an error occurs.

The user programmes the microprocessor via the Display and Keyboard. Having entered your password, the programme can be changed. For larger systems, extension frames LBB 1360/30 can be used.

Display buffer

Proc.

Z80 B

X-tal

5,068 MHz

EPROM

32kB

RAM

32kB

Real time clock

X-tal

32,768 kHz

Interface

I/O

PCB

Databus

Addressbus

Controlbus

Clock data

Clock data

Clock data

Clock data

Clock data

Clock data

6

5

4

3

2

1 to extension frames

To all cards

RS 232

Comm.

line

23

6.1.2

PILOT TONE GENERATOR CARD - PGC

Main data

■

Card for the Surveillance Basic System

■


■

■

20 kHz tone oscillator

16 independent balanced outputs

Burst pilot-tone

Cont. pilot-tone


Input : None

Output: Via Termination Boards to the amplifiers

Others: Continuously active and not controlled by the system


Unlimited

Operations

The Surveillance System uses an ultrasonic

20 kHz pilot tone signal which is produced by this card. The tone signal is inserted at the specially developed test input on the

Philips rack mounted amplifiers (e.g.

SQ45) and then broadcasted to all the loudspeakers in the corresponding zones.

The Surveillance System checks for the presence of this tone signal at various strategic points in the zone.

One single oscillator is used on every card to drive 16 electrically balanced outputs.

One card can feed therefore 16 amplifiers/loudspeaker zones with pilot tone signals.

The card is not connected to any other card in the system. Only the required +15V and -15V will be supplied by the system.

To reduce power dissipation in amplifiers this card can operate with two possibilites:

- Continuous pilot-tone

- Burst pilot-tone (35 ms On, 260 ms Off)

These possibilities can be selected by a jumper located on the card. In addition the appropriate pilot-tone detection cards LBB

1367 and LBB 1368 are made suitable for this feature.

+15V

0

-15V

20 kHz

Oscill.

DC-supply stabiliser

LBB 1369/00

+

-

+15V

LEDs

-15V

1

1

Balanced outputs 1-8

8

8

9

9

Balanced outputs 9-16

16

16

24

6.1.3

SURVEILLANCE SWITCH CARD - SSC

Main data

■

Card for the Surveillance Basic System

■


■

■

■

8 Individual ‘test line’ outputs

Each test line supplies up to

128 monitoring devices with power and individual data communication

3 ‘Error’ inputs

Green LED


Input: Amplifier Surveillance Board


Output: Amplifier Surveillance Board




4 Cards to scan up to 4096 units.

Operation

Since the Surveillance System is incapable of reading information from all of the monitoring devices at the same time, the card sequentially powers each string of

Amplifier/Loudspeaker Surveillance Boards and receives data in turn from those boards.

The card is controlled by the Central

Processor Card. It sends +15 V power to each of the 8 lines in sequence. Because the

+15 V comes from a separate power supply, a galvanic separation with the system is present.

Supply

+5V

From

CPC

Red LED

1

8

Up to 128 monitoring devices may be linked together on each test line.

The card has 3 external Error Inputs which can be activated by a closed contact. This could be a contact from a dedicated error relay on a Control Relay Card of the

Distribution System, a smoke detector, a micro switch, etc.

The position of the card in the system is defined by an ‘address’ accomplished by jumper setting on the card.

Because of the internal wiring these cards must be fitted to the 4 positions on the far left hand site of the basic frame.

1

8

LBB 1374/00

+15V

Comm.

line

+15V

Comm.

line

1

2

3

+15V

Comm.

line

External

Error

Inputs

25

6.2

SEPARATE PRINTED CIRCUIT BOARDS

6.2.1

LOUDSPEAKER SURVEILLANCE BOARD - LSB

Main data

■

Separate board for the Surveillance

■

System

PCB dimensions 8x6 cm with solder-

■

■ pin connections

Monitoring the secondary side of the loudspeaker transformer and the voice coil of the loudspeaker

Sensing the presence of the 20 kHz pilot signal

Current

Detector


Input: Surveillance Switch Card

Output: Surveillance Switch Card



In total more than 4,000 Loudspeaker

Surveillance Boards (and/or Amplifier

Surveillance Boards) can be connected via 4

Surveillance Switch Cards to the Central

Processor Card.

Operation

This board monitors the continuity of the loudspeaker voice coil, the transformer, and the wiring to the amplifier by checking the presence of the 20 kHz pilot tone signal. It can easily be mounted inside a loudspeaker cabinet.

The board is wired in series between the secondary side of the loudspeaker transformer and the voice coil of the loudspeaker. In this position it is able to sense any dramatic changes in the current drawn by the loudspeaker at 20 kHz.

When a fault occurs, the Central Processor

Card detects this fault via the test line of the Surveillance Switch Card and an error message is sent to the system’s display or printer.

In a 100 V line system a wide range of variations are possible at the amplifier and the loudspeaker transformer output.

Therefore on each board a test switch, a

LED indicator and a potentiometer are provided to make local adjustment easy.

Each board has an ‘address’ which is obtained by setting the DIP-switches on the board and which allows the board for communication with the Central Processor

Card.

A single standard 2 core 0.75 mm screened microphone cable carrying both data and power can be used to connect the boards over a maximum distance of 1,000 metres.

Data

Power

P

26

Test

LBB 1367/00

Address

6.2.2

AMPLIFIER SURVEILLANCE BOARD -ASB

Main data

■

Separate board for the Surveillance

■

System

PCB dimensions 6.5x7.2 cm with

■

■ solder-pin connections to be used in the

Phoenix mounting system

Sensing the presence of the 20 kHz pilot tone at amplifiers output and on loudspeaker lines (100 V system)

Stand-alone applicable

20 kHz

Extern

Pilot tone detection


Input: Pilot tone Generator Card


100 V sense-line or external contact

Output: Surveillance Switch Card

External relay contacts


Data

Power p


128 boards may be linked together to

1 communication line

Operation

This board checks constantly the presence of the 20 kHz pilot signal on the 100 V loudspeaker line. There are two places where this check could be done. That is to say, directly behind the amplifier to monitor the amplifier output and on the loudspeaker input to monitor the line. The board can easily be mounted in the back of the amplifier rack.

Each board has an ‘address’ which is obtained by setting the DIP-switches on the board and which allows the board for communication with the Central Processor

Card.

A single standard 2 core 0.75 mm screened microphone cable carrying both data and power can be used for connecting the boards.

The board can be triggered in two different ways. If you select the line input, the absence of the 20 kHz pilot signal will be detected. If the external input is used, the closed contact of any external device

(smoke detector, micro switch, etc.) will trigger the board.

When the board has been triggered, it stops sending a message via the data test line to the Surveillance Switch Card and the

Central Processor Card generates visual or printed information concerning the error.

A jumper is provided to allow the fitted relay with break and make contacts to be active or non-active. The relay output contacts can be used for activating warning devices or switching-on spare amplifiers

(with external relays).

Address

LBB 1368/00

Power

Relay

Out

27

7.

7.1

SPECIFICATION

GENERAL

Supply

Mains voltage : 220 V (175 - 264 V)

: 110 V ( 90 - 140 V) by strapping

: 47 - 440 Hz Frequency

Power consumption:

- Distribution Basic System : 160 VA (fully loaded frame)

- Surveillance Basic System : 245 VA (fully loaded frame)

- Extension Frame : (depending on the number of cards)

Data retention time

Safety standard

: >30 days

: according to IEC 65

Environmental Conditions

Temperature : +5 to +55 °C

Mechanical

Dimensions (wxdxh)

- rack frame

- circuit cards

: 483 x 335 x 133 mm (3HE)

: 1.6 x 220 x 100 mm

Weight

- Distribution Basic System : 6.5 kg

- Surveillance Basic System : 6.8 kg

- Extension Frame : 5.5 kg

Terminations

- Termination boards

- Standard Call Station

: screw connector blocks

: DIN -3 pin male (180°)

7.2

CARD SUPPLY

+15V

Typical supply currents (mA)

-15V

Distribution System Cards

Input Card


Matrix Card

Control Relay Card

Tone Control Card

Call Station




Distribution Basic System

without optional cards max. available power:

PE 1141/52

45

45

75

105

80

15

130

65

50

290

1000

35

35

75

105

80

130

60

50

245

1000

Surveillance System Cards

Pilot Tone Generator Card


Control Relay Card

Amplifier Surveillance Board


Surveillance Basic System

max. available power:

PE 1141/52

PE 1268/10

25

*

105

5

3

25

–

105

–

–

1000

2000

1000

–

Extension Frame

max. available power:

PE 1113/50 2000 2000

* separate power supply PE 1268/10 consumption depends on the number of ASB/LSB boards connected to the communication lines.

28

+5V

345

4000

4000

–

–

–

12

10

–

–

140

140

10

10

–

–

–

125

25

7.3

AUDIO SIGNAL DATA

Distortion

[%]

1 kHz @ output level

Output S/N Ratio

[dBV] [dB]

+0dB +10dB +15dB max (A) (flat)

Crosstalk

[dB]

5kHz 10kHz 15kHz

Distribution

Systems

Input Card

Signal Gen. Card

Matrix Card

- normal in

- feed through

Control Relay Card

Tone Control Card

Call Station

- 84 dB(SPL)

- 124 dB(SPL)

Optional Cards

Signal Process. Card

- comprtessor/ limiter

- filter

Audio Volume

Control Card


Distribution Basic

System

(without optional cards)

*to be specified

<0.1

<0.2

<0.2

-

<0.1

<0.2

<0.5

<0.1

<0.1

-

-

<0.1

<0.1

-

-

-

<0.1

<0.5

<0.1

<0.1

<0.1

-

-

-

<0.5

<2 <4

-

<0.1

<0.2

<0.5

-

-

-

-

-

-

+20

+0

+15

+15

+15

-

+0

+5

+5

+15

+15

-

-

>85 >81

>85 >81

>84 >81

>90 >87

-

>88 >85

-

>64 >61

-

>78 >75

>85 >83

>78 >75

>* >*

>79 >76

>80 >74 >70

-

>85 >79 >75

-

>85

-

-

-

>80

-

>85

>85

-

-

-

-

>80

>80

>85

-

-

-

>80

>79 >73 >69

-

-

-

Frequency

Response

[Hz]

-3dB range (0.5dB)

70-60,000 (20,000)

-

30-60,000 (15,000)

30-60,000 (20,000)

-

30-20,000 -

-

200-15,000 (12,500)

-

40-15,000

30-20,000

40-20,000

320-6,000

70-60,000 (15,000)

-

-

-

-

29

7.4

CALL STATION CHARACTERISTICS

90°

60°

120° a b c

=

=

=

250 Hz

500 Hz

1000 Hz

150°

30°

0°

0

0°

-10

-20 dB c b d e f

180° 180°

30°

60°

90°

150°

120° d f e

=

=

=

2000 Hz

4000 Hz

8000 Hz

10 dB

0°

90°

180°

1 2 3

32 63 125 250 500 1k 2k 4k

Curne 1

Curve 2

Curve 3

=

=

=

Bass cut reduced after service modification

Factory delivered bass cut

Bass cut increased after service modification

8k 16k 32kHz

30

7.5

AUDIO SIGNAL LEVEL DIAGRAM

64

54

44

34

24

14

4 dB SPL

114

104

94

84

74

CST

20

10

LIMITER

0

-10

AUX

IPC

-20

MC TCC

Signal

1V

100mV

-60

-70

-30

-40

-50

-80

-90

-100

-110

-120 dBV

= Equivalent Input Nouse (RMS B = 20 kHz Flat)

10mV

2mV

CST

NOISE

AUX

31

9498 974 08814 96-20 © Philips Electronics N.V. 1996

Philips

Communication &

Security Systems

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