Precautions For Safe Use - Omron NJ501-4500 Manual

Precautions for Safe Use

Disassembly and Dropping
• Do not attempt to disassemble, repair, or modify any Units. Doing so may result in malfunction or fire.
• Do not drop any Unit or subject it to abnormal vibration or shock. Doing so may result in Unit malfunc-
tion or burning.
Mounting
The sliders on the tops and bottoms of the Power Supply Unit, CPU Unit, I/O Units, and other Units
must be completely locked (until they click into place) after connecting the adjacent Unit connectors.
Installation
Always connect to a ground of 100 Ω or less when installing the Units. To avoid electric shock, be sure
to install a ground of 100 Ω or less especially when shorting the GR and LG terminals on the Power
Supply Unit.
Wiring
• Follow the instructions in the NJ-series CPU Unit Hardware User's Manual (Cat. No. W500) to cor-
rectly perform wiring.
Double-check all wiring and switch settings before turning ON the power supply.
• Use crimp terminals for wiring.
Do not connect bare stranded wires directly to terminals.
• Do not pull on the cables or bend the cables beyond their natural limit.
Do not place heavy objects on top of the cables or other wiring lines. Doing so will damage the cable.
• Mount terminal blocks and connectors only after checking the mounting location carefully.
• Make sure that the terminal blocks, expansion cables, and other items with locking devices are prop-
erly locked into place.
• Before you turn ON the power supply, be sure to remove any dustproof labels that are put on the top
of the Units when they are shipped. If the labels are not removed, heat will accumulate and malfunc-
tions may occur.
• Before you connect a computer to the CPU Unit, disconnect the power supply plug of the computer
from the AC outlet. Also, if the computer has an FG terminal, make the connections so that the FG
terminal has the same electrical potential as the GR terminal on the Power Supply Unit.
A difference in electrical potential between the computer and Controller may cause failure or mal-
function.
• If the external power supply to an Output Unit or slave has polarity, connect it with the correct polarity.
If the polarity is reversed, current may flow in the reverse direction and damage the connected
devices regardless of the operation of the Controller.
NJ-series NJ Robotics CPU Unit User's Manual (W539)
Precautions for Safe Use
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