Application Precautions - Omron CJ1W-PNT21 Operation Manual

Application precautions

!Caution
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Application precautions

!Caution
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The operating environment of the Unit can have a large effect on the longevity and
reliability of the system. Unsuitable operating environments can lead to malfunction,
failure and other unforeseeable problems with the system. Ensure that the operating
environment is within the specified conditions at installation and remains within the
specified conditions during the life of the system. Follow all installation instructions and
precautions provided in the operation manuals.
Observe the following precautions when using the CJ1W-PNT21 PROFINET
IO Controller Unit.
Failure to abide by the following precautions could lead to faulty operation of the Unit or
the system. Always heed these precautions:
• Install double safety mechanisms to ensure safety against incorrect signals that
may be produced by broken signal lines or momentary power interruptions.
• When adding a new device to the network, make sure that the baud rate is the
same as other stations.
• When adding a new SmartSlice I/O Unit to the Communication Unit, make
sure that the CJ1W-PNT21 PROFINET IO Controller Unit is powered
down, to prevent unexpected results when starting up the new station.
• Use specified communication cables.
• Do not extend connection distances beyond the ranges given in the specifications.
• Always turn OFF the power supply to the personal computer, Slaves, and
Communication Units before attempting any of the following:
• Mounting or dismounting the CJ1W-PNT21 PROFINET IO Controller Unit,
Power Supply Units, I/O Units, CPU Units, or any other Units.
• Assembling a Unit.
• Setting DIP-switches or rotary switches.
• Connecting or wiring the cables.
• Connecting or disconnecting connectors.
• Be sure that all the mounting screws, terminal screws, Unit mounting screws, and
cable connector screws are tightened to the torque specified in the relevant
manuals. Incorrect tightening torque may result in malfunction.
• Always use the power supply voltage specified in this manual.
• Double-check all the wiring and connection of terminal blocks and connectors
before mounting the Units.
• Take appropriate measures to prevent foreign objects from entering the unit when
mounting or wiring it. Failure to do so, may result in unit damage, electric shock or
fire.
• Use crimp terminals for wiring. Do not connect bare stranded wires directly to
terminals.
• Observe the following precautions when wiring the communication cable.
• Separate the communication cables from the power lines or high-tension lines.
• Do not bend the communication cables.
• Do not pull on the communication cables.
• Do not place heavy objects on top of the communication cables.
• Always wire communication cable inside ducts.
• Use appropriate communication cables.
• Take appropriate measures to ensure that the specified power with the rated
voltage and frequency is supplied in places where the power supply is unstable. An
incorrect supply power may result in malfunction.
• Install external breakers and take other safety measures against short-circuits in
external wiring. Insufficient safety measures against short-circuits may result in
burning.
• Double-check all the wiring and switch settings before turning ON the power supply.
• When transporting or storing the product, cover the PCB's with electrically
conductive materials to prevent LSI's and IC's from being damaged by static
electricity, and also keep the product within the specified storage temperature
range.
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