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Installation Section 5-2
Expansion Rack
Note Connect the I/O Interface Unit directly to the Power Supply Unit.
There is no Backplane for the CJ-series. The PLC is constructed by connect-
ing Units together using the connectors on the sides.
!Caution Attach the End Cover to the Unit on the far right side of the Rack. An I/O bus
error will occur and the PLC will not operate in either RUN or MONITOR mode
if the End Cover is not connected. If this occurs, the following information will
be set in memory.
Note 1. Always turn OFF the power supply before connecting Units to each other.
2. Always turn OFF the power supply to the entire system before replacing a
Unit.
3. A maximum of 10 I/O Units can be connected to a CPU Rack or an Expan-
sion Rack. If 11 or more I/O Units are connected, and I/O overflow error will
occur and the PLC will not operate in either RUN or MONITOR mode. If
this occurs, The I/O Overflow Flag (A40111) will turn ON and A40713 to
A40715 (I/O Overflow Details 2) will turn ON.
5-2-6 DIN Track Installation
Use the following procedure to install a CJ-series PLC on DIN Track.
1,2,3... 1. Release the pins on the backs of the CJ-series Units.
I/O Interface Unit
I/O Units (10 max.)
End Cover
(included with
I/O Interface Unit)
Power Supply
Unit
Name Address Status
I/O Bus Error Flag A 40114 ON
I/O Bus Error Slot Number A40400 to A40407 0E hex
I/O Bus Error Rack Number A40408 to A40415 0E hex
Releas
DIN Track
mounting pins
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