2 Basic System Configuration and Devices
2-2
CJ2 CPU Unit Hardware User’s Manual
2-1 Basic System Configuration
z CPU Rack
A CPU Rack can consist of a CJ2 CPU Unit, a CJ-series Power Supply Unit, CJ-series Configuration
Units (Basic I/O Units, Special I/O Units, CPU Bus Units), and a CJ-series End Cover. The same CJ-
series Power Supply Units and CJ-series Configuration Units that are used with CJ1 CPU Units are
used with CJ2 CPU Units.* An I/O Control Unit is required to connect a CJ-series Expansion Rack.
A Memory Card is optional.
* All CJ-series Units can be used as Configuration Units, but only Units that specifically support the CJ2 CPU Unit
can access the expanded portions of the I/O memory areas of the CJ2 CPU Units (i.e., A960 to A1471, A10000
to A11535, and EM banks D to 18). Only the following CJ1 Units specifically support the CJ2 CPU Units.
• EtherNet/IP Unit: CJ1W-EIP21
• Position Control Units: CJ1W-NC214, CJ1W-NC234, CJ1W-NC281, CJ1W-NC414, CJ1W-NC434, CJ1W-
NC481, and CJ1W-NC881
• Analog Input Unit: CJ1W-AD042
• Analog Output Unit: CJ1W-DA042V
• Serial Communications Units: CJ1W-SCU22, CJ1W-SCU32, and CJ1W-SCU42
z Expansion Racks
A CJ-series Expansion Rack can be connected to the CPU Rack or another CJ-series Expansion
Rack. An Expansion Rack can consist of an I/O Interface Unit, a Power Supply Unit, Basic I/O Units,
Special I/O Units, CPU Bus Units, and an End Cover.
2-1-1 Basic System Configuration
CPU Rack
Power Supply Unit
CPU Unit
I/O Control Unit
Configuration Units
(Basic I/O Units, Special
I/O Units, CPU Bus Units)
Configuration Units
(Basic I/O Units, Special
I/O Units, CPU Bus Units)
Expansion Rack
Power Supply Unit
I/O Interface Unit
End Cover
End Cover
Memory Card
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