Aiphone AI-900 Dokumentacja Pobierz pdf (Strona 25)

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

2 twisted pair cables

HOT

GND

HOT

GND

HOT

GND

HOT

GND

AI-900MS

CN1

CN2

CN3

CN4

Line 1 for

recording

Line 2 for

recording

To voice input (HOT)

To voice input (GND)

To recording start input (HOT)

To recording start input (GND)

Recording device

Voice output

Control output

Voice output

Control output

Front view of

the circuit board

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Aiphone AI-900 Dokumentacja Strona 25