Aiphone AI-900AFAudio Function Card Connection, Amplifier and AI-900AFconnection

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)

AI-900AF
CN4	Voice output		HOT
			GND
	Control output 1	HOT	HOT
			GND
CN5		GND
			HOT
	Control output 2	HOT
			GND
		GND
	Control output 5	HOT	HOT
CN6			GND
		GND	HOT
	Control output 6	HOT
			GND
		GND
	Control output 9	HOT	HOT
			GND
CN7		GND
	Control output 10	GNDHOT	HOT
			GND
		HOT	HOT
CN8	Control output 13		GND
		GND
			HOT
		GNDHOT
	Control output 14		GND

Control output 3 Control output 4

Control output 7 Control output 8

Control output 11 Control output 12

Control output 15 Control output 16

Front view of the circuit board

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