Aiphone installation manual Connection, External sound sources and AI-900AFconnection

12.8.2. External sound source and AI-900AF connection

The External Sound Source Distribution function can be operated using the AI-900AF.

[Connection]

To connect external sound sources to the AI-900AF, use a twisted pair cable for voice input, and a twisted pair cable for control input (level-operated activation). The voice input is 0 dB* and of unbalanced type. The start input is a no-voltage make contact of 20 mA, 24 V DC max. Connect as shown below.

*0 dB = 1 V

External sound sources and AI-900AF connection

To voice output (HOT)

To voice output (GND)

4 twisted pair cables

Mixer

Sound source

Voice (HOT)

AI-900AF

CN1

CN2

CN3

Voice input

Control input 1

Control input 2

Control input 3

Control input 4

HOT

GND

HOT GND

HOT GND

HOT GND HOT GND

Sound source
Voice (GND)
Sound source
Sound source
To control input (HOT)
To control input (GND)	Timer
To control output (HOT)
To control output (GND)

Front view of the cicuit board

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