Precautions When Handling Units - Omron CJ Series Operation Manual

1-5-2

Precautions when Handling Units

• Be sure to turn OFF the power supply to the Controller before Units or connecting lines are installed
or disconnected.
• To reduce the risk of malfunctioning due to electrical noise, wire input and output lines in separate
ducts from high-voltage and power lines.
• 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 mea-
sures 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.
M A C
N o .
1
x 1 0
0
x 1 0
Precautions in Handling Removable Terminal Blocks
• The terminal block is removable. Press the lever on the bottom of the terminal block to remove the
terminal block.
• During normal use, check that the lever is raised and the terminal block is locked in place.
Precautions for Safe Use
Precautions for Terminal Blocks on CJ1WPH41U Universal Input Units
• CJ1W-PH41U Universal Input Units have cold junction sensors. The accuracy will be specified
only when the cold junction sensor (i.e., the terminal block) and the Unit are used as a set.
Always use the terminal block and the Unit as a set. Both the terminal block and the Unit have
labels on them that provide the calibration control number.
• If repairs are required to the Unit, always return the terminal block (which includes the cold
junction sensor) with the Unit.
Calibration control number
Calibration month
CJ-series Analog I/O Units Operation Manual for NJ-series CPU Unit(W498)
Remove the label after the
wiring has been completed.
R U N
E R C
E R H
H
2011/04
Calibration control number label
1 Overview and Features
1
1-25