This section provides tools to calculate the CJ1 system current consumption total needed to select
the power supply. When the number of modules or power requirements exceeds the capability of the
power supplies available, I/O expansion racks solve the problem. If the number of modules per rack
exceeds 10 or the current consumption is greater than the capacity of the power supply units, use the
CPU and expansion rack configuration.
Basic Configuration
A CJ1 Series basic configuration consists of a CPU, Power Supply Unit, Basic I/O Modules, Special I/O Modules, CPU
Bus Modules, and an End Cover. Add up the current consumption of all the modules and the CPU according to the
formula on the following page and then select the Power Supply Unit right for the application.
CPU and Expansion Racks
If the number of modules per rack exceeds 10 or the current consumption is greater than the capacity of the Power Supply
Units, use the CPU and Expansion Rack configuration. This divides the load from the modules across two Power Supply
Units. To ensure communication and automatic channel assignment in programming, order an I/O Control Module for the
CPU Rack and an I/O Interface Module on each Expansion Rack.
OMRON CJ1W-TER01 END PLATE FOR CJ1 CPU RACK OR EXPANSION RACK
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