4-22
AFP-400 Installation
PN 50253:A2 03/12/96
System Configuration Drawings
Wiring an AFP-400 Audio
Signal without a Backup
Amplifier
These drawings illustrate the use of two AA-30 Audio Amplifiers without
backup.The first two speaker circuits share 30 watts from one AA-30;
the third and fourth speaker circuits share 30 watts from the second AA-30.
1) Set FFT-7 SW1 for four-wire operation (down position).
2) Mount an R470 resistor across P3-4 and P3-5 on the last amplifier.
Item
Supplied with
Part Number
Low level Audio cable
AA-30, AA-100, AA-120
75100
Telephone cable
VTCC-1 package
75121
25-volt Audio cable
AA-30, AA-100, AA-120
75109
Cable
FFT-7
75097
470 ohm resistor
AMG-1
R470
Wiring Inventory
Field wiring to speaker
circuit
Field wiring to telephone circuit
Cable 75121
Cable 75109
FFT-7
SW1
P5
P6
P4
P3
Resistor R470
P1
P2
P6
P1
P2
P6
Wiring an Audio Signal without a Backup Amplifier
Block Diagram
Distribution for Audio Block Diagram
Wiring Diagram
Cable 75109
Cable 75110
Cable 75110
Cable 75097
Audio
Amplifier
AMG-1
Use 18AWG to 12AWG twisted-
pair cable for EIA-485
connections.
This wiring diagram applies to
AA-30, AA-100, and AA-120
audio amplifiers. Connections
to plugs P1, P2, P4, P5, P6, P7,
P9, and P10 are identical.
Resistor R470 mounted across
terminals 4 and 5 on the last
Audio Amplifier.
