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26
z Connect the microphone/line input cable and the microphone (for use of the audio reception
function).
Input impedance: 2 kΩ±10 %
Recommended cable length: Less than 1 m {3.3 feet} (for microphone input)
Less than 10 m {33 feet} (for line input)
Recommended microphone: Plug-in power type microphone (option)
Connect a monaural mini plug (ø3.5 mm).
•Supplyvoltage: 2.5V±0.5V
•Recommendedsensitivity
of microphone: −48 dB ±3 dB (0 dB=1 V/Pa,1 kHz)
IMPORTANT:
•
Connect/disconnect the external speaker cables or audio/video cables after turning off the
power of the camera and the amplifier. Otherwise, loud noise may come out from the speaker.
x Connect an external amplifier-embedded speaker to the audio output cable (for use of the
audio transmission function).
Connect a stereo mini plug (ø3.5 mm) (Audio output is monaural.).
• Recommendedcablelength:10m{33feet}orless
c Connect the alarm input/output cable.
<Ratings>
Terminal name Ratings
ALARM OUT, AUX OUT Open collector output (maximum applied voltage: 20 V DC)
Open 4 V DC - 5 V DC by internal pull-up
Close Output voltage 1 V DC or less (50 mA or less)
ALARM IN Non-voltage make contact input (4 V DC - 5 V DC, internally pulled
up)
Off Open or 4 V DC - 5 V DC
On Make contact with GND (required drive current: 1 mA or more)
Note:
•Checkifratingofanexternaldevicesuchasasensorisapplicabletotheratingofthis
product by referring to the provided operating instructions.
Specication of 4P alarm cable (accessory)
GND (black)
ALARM IN3, AUX OUT (gray) (Terminal 3)
ALARM IN2, ALARM OUT (red) (Terminal 2)
ALARM IN1 (green) (Terminal 1)