Circuit Diagram - Philips SM40 Instructions For Use Manual

5. SM40 MODULES
5.2.3 Relay Termination Board
Function
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 (see circuit diagram on opposite page).
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 a SM40 system which in turn can be activated by programming the system.
Installation
This card should be installed in place of a normal termination board (replaces it) inside an SM40 system
and should be connected via 2 standard flat cables of 16 wires, to the Control Relay Card. See Termination
Board Connectors.
The power supply voltage for the relays is achieved from the internal SM40 power supply (+15 Volt and
-15 Volt) via a standard 2-wire flat
cable (see attached connecting
diagram).
Remarks
The card is protected against
reversed connection of the
power supply voltage.
Instead of the internal power
supply unit of the SM40 system
an external power supply unit
of approx. 30 volt can be used
to activate the relays.
Depending on the required
audio power in the loudspeaker
zones, 1 up to 4 call and/or
music amplifiers can be
connected to this card creating
8 loudspeaker zones.
NOTE: Relays are de-activated
during calls via the Relay
Termination Board (RTB).
Relay Termination Board
LBB 1379/00
X1 - 1
F rom :
Call Amplifier
X1 - 2
X1 - 3
Fro m:
Music Amplifier
X1 - 4
X1 - 5
From:
Call Amplifier
X1 - 6
X1 - 7
Fro m:
Music Amplifier
X 1 - 8
X1 - 9
F rom :
Call Amplifier X1 - 10
X1- 1 1
Fro m:
Music Amplifier
X1- 1 2
X1- 1 3
F rom :
Call Amplifier X1- 1 4
X1- 1 5
Fro m:
X1- 1 6
Music Amplifier
-
+
LBB 1379/00

Circuit diagram

Control Relay Card
LBB 1356/00
X3 - 2
-
X3 - 1
+
X2 - 1
To LS
X2 - 2
zone A
X3 - 6
-
X3 - 5
+
X2 - 3
To LS
X2 - 4
zone B
X3 - 1 0
-
X3 - 9
+
X2 - 5
To LS
X2 - 6
zone C
X3 - 1 4
-
X3 - 1 3
+
X2 - 7
To LS
X2 - 8
zone D
X4 - 2
-
X4 - 1
+
X2 - 9
To LS
X2 - 1 0
zone E
X4 - 6
-
X4 - 5
+
X2- 1 1
To LS
X2- 1 2
zone F
X4 - 1 0
-
X4 - 9
+
X2 - 1 3
To LS
X2 - 1 4
zone G
X4 - 1 4
-
X4 - 13
+
X2- 1 5
To LS
X2- 1 6
zone H
- 1 5 V
+ 1 5 V
5
5-7