External Recording Device And Ai-900Ms Connection - Aiphone AI-900 Installation Manual

12.3.2. External recording device and AI-900MS connection

An external recording device can be connected to each master station line.
[Connection]
To connect the external recording device, 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 20 mA, 24 V DC max. Connect as shown below.
*0 dB = 1 V
External recording device and AI-900MS connection
To voice input (HOT)
To voice input (GND)
To recording start input (HOT)
To recording start input (GND)
2 twisted pair cables
Recording device
2 twisted pair cables
Recording device
AI-900MS
CN1
Line 1 for
CN2
recording
CN3
Line 2 for
CN4
recording
Front view of
the circuit board
HOT
Voice output
GND
HOT
Control output
GND
HOT
Voice output
GND
HOT
Control output
GND
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