Philips SM30 User Manual download pdf (Page 4)

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SM30 plug-in modules

All of the interconnections between

individual modules in the Control Centre

take place automatically when they are

plugged into the interconnection board of

the Control Centre, so that no complex

inter-wiring is required. Owing to the

unique construction of the housing, the

modules slide in and out quickly and easily.

These features make SM30 simple and

inexpensive to install and maintain.

All switching and routing of the system is

carried out by software, so that hard-wiring

problems are kept to a minimum. This

means that though SM30 comprises a great

amount of features, making it a

comprehensive Public Address Centre, the

unit itself is uncluttered and simple to

assemble and use.

Call Station

The Call Station is the primary input to the

system, allowing the operator to route and

broadcast calls, announcements and music.

Each Call Station includes:

■ An electret condenser microphone.

■ A Numeric Keypad, allowing individual

selection of up to 18 loudspeaker zones

by typing in the zone number. Each Call

Station can be programmed with a

priority status, attention tone and pre-

recorded message. These become

operational whenever the keypad is used

to route a call.

■ Zone Selection Indicator.

Each zone has its own LED which is

illuminated when the zone is selected.

When the call is completed the LEDs will

be extinguished.

■ 4 Function Keys.

Programmable with: priority; alarm and

attention tones; pre-recorded messages;

routing to loudspeaker zones; and

Control Relay activation.

■ Alternative functions.

These include music volume up/down;

music source selection; music mute; and

independent Control Relay switching or

toggling.

Using the Function Keys to make a call is

done in the same way as using the Key-pad.

The main difference being that instead of

the operator selecting the zones using the

Numeric Keypad, the Function Keys route

the call to a pre-programmed selection of

zones.

This of course saves a great amount of time

when an operator has to frequently call the

same selection of zones, or when an “ALL

CALL” must be made in emergencies.

Signal generator

Built into the SM30 Control Centre is a

signal generator, programmed with attention

tones and alarm signals. These can be

programmed, via the User Menu, to precede

a call or pre-recorded message, or to be

activated independently.

Background music

Background music sources, such as a

background music player, a radio tuner, a

compact disc player, a cassette deck, etc. are

connected and pre-adjusted.

Emergency Power Supply +48 VDC

In situations where the mains power supply

is unreliable, and SM30 is used for

security/evacuation purposes, an emergency

power supply may be used. This will be

switched on automatically whenever the

mains power fails.

Block diagram

The block diagram of a SM30 system is

shown in ﬁg.1.

GB/SM 30 user manual 5/26/98 10:17 AM Page 2

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