User manual

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4-pin Connector Layout
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CH1 CH2 CH3 CH4 3G/GPRS GPS
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EXTEND
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DEBUG
SENSOR
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Remarks:
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If the power supply is 12V, then the current of 12V ouput is limited to 1A. If there
are more than 3 cameras, we suggest that customers get power for other
cameras from the 12V vehicle power directly.
RS485 and RS232 interfaces are optional.
Ports:
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DEBUG: testing port
EXTEND: intercom connection port
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SD Card Installation
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Unlock the unit with the key, making sure that the arrow points to the “UNLOCK” position.
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Note: The lock also controls the power. When it is placed in the locked position, it also
means that the DVR is powered and ready to use. Before turning on, please make sure all the
cables in the system are well connected; otherwise, damage could occur.