Ai-900Af Audio Function Card Connection; Amplifier And Ai-900Af Connection - Aiphone AI-900 Installation Manual

12.8. AI-900AF Audio Function Card Connection

12.8.1. Amplifier and AI-900AF connection

Paging can be provided through connected external amplifiers using the AI-900AF.
[Connection]
To connect the amplifier to the AI-900AF, use a twisted pair cable for voice output, and a twisted pair cable for
control output. The voice output is 0 dB* and of unbalanced type. The control output is an open collector
output of 20 mA, 24 V DC max., and permits connection of up to 16 channels. Connect as shown below.
*0 dB = 1 V
External amplifier and AI-900AF connection
To voice input (HOT)
To voice input (GND)
1 twisted pair cable
1 twisted pair cable
Amplifier(1)
Amplifier(2)
To start input (HOT)
To start input (GND)
Amplifier(15)
Amplifier(16)
34
AI-900AF
CN4 Voice output
Control output 1
CN5
Control output 2
Control output 5
CN6
Control output 6
Control output 9
CN7
Control output 10
Control output 13
CN8
Control output 14
HOT
GND
HOT
Control output 3
HOT
GND
GND
HOT
Control output 4
HOT
GND
GND
HOT
Control output 7
HOT
GND
GND
HOT
Control output 8
HOT
GND
GND
HOT
Control output 11
HOT
GND
GND
HOT
Control output 12
HOT
GND
GND
HOT
Control output 15
HOT
GND
GND
HOT
Control output 16
HOT
GND
GND
Front view of
the circuit board