Ai-900af audio function card connection – Aiphone AI-900 User Manual

Page 34

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

To start input (HOT)

To start input (GND)

AI-900AF

CN4

CN5

CN7

CN8

CN6

Voice output

Control output 1

Control output 2

Control output 3

Control output 4

Control output 9

Control output 10

Control output 11

Control output 12

Control output 5

Control output 6

Control output 7

Control output 8

Control output 13

Control output 14

Control output 15

Control output 16

HOT
GND
HOT
GND

HOT
GND

Amplifier(1)

Amplifier(2)

Amplifier(15)

Amplifier(16)

Front view of
the circuit board