Precautions for connection
Notice
•When connecting 5 or more HDD extension units (with 2 HDDs mounted on each unit) to the digital recorder, you are recommended to use USB cable as illustrated below to prevent recognition error of digital recorder due to different
Furthermore, before you start operation or when the power restores from a power failure, check that the HDDs are recognized correctly even when a small number of HDD extension units are connected.
Digital recorder
ENGLISH
IN
This unit
OUT
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This unit
OUT
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This unit
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This unit
OUT
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This unit
OUT
IN
This unit
OUT
IN
This unit
IN
This unit
OUT
IN
This unit
OUT
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This unit
OUT
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This unit
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This unit
OUT
IN
This unit
OUT
IN
This unit
*When 2 serial bus ports are used.
•The EXTERNAL CONTROL switch is set to ON by default. In this status, this unit does not work even though you connet the power cord and set the MAIN switch to ON.
Connect this unit and the recorder as “Connection to link the power supply of the recorder and this unit” on 
page 10.
Tips 
•The available number of HDD extension units to be connected varies depending on the recorder connected. Check the specification of the recorder.
•You cannot connect 6 or more HDD extension units in series using serial bus.
•The number of serial bus ports varies depending on the digital recorder connected. For stable recording, it is recommended to use the ports of the recorder as many as possible to avoid branch connection of the extension units.
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