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2 Components, Installation and Wiring
2-2
Installation
2-2-1
System Configuration Precautions
The High-speed Counter Units are connectable with CPU Racks and Expansion Racks. A maximum of
10 Units can be mounted on a Rack, and a total of 24 Units on CPU Racks and Expansion Racks alto-
gether.
2-2-2
Installing Units
Precautions for Safe Use
• Prevent wire clippings, cutting chips or other materials from getting inside the Unit. They could
cause scorching, failure, and malfunction. Pay particular attention to this during installation
and take measures such as covering with a cover.
• If the Unit was shipped from the factory with the dust protection label on top of the unit, be sure
to remove that label before switching ON the power. The label prevents heat dissipation and
could cause a malfunction.
• Be sure to turn OFF the power of the controller before installing or removing units or connect-
ing or disconnecting connecting lines.
Use the following procedure to install CJ1W-CT021 High-speed Counter Units. Connect the Units
before mounting them to DIN-rail.
1
Align the connectors and hooks accurately and press the Units together firmly when connecting
them.
2-6
Hook
CJ-series High-speed Counter Units Operation Manual for NJ-series CPU Unit(W492)
Hook holes
Connector
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