Omron CRT1 - 10-2009, Operation Manual

Page: 20 / 675

xx
Application Precautions
5
!Caution
The operating environment of the PLC System can have a large effect on the
longevity and reliability of the system. Improper operating environments can
lead to malfunction, failure, and other unforeseeable problems with the PLC
System. Make sure that the operating environment is within the specified con-
ditions at installation and remains within the specified conditions during the
life of the system.
5 Application Precautions
Observe the following precautions when using a CompoNet Network.
• When transporting the Unit, use special packing boxes and protect it from
being exposed to excessive vibration or impact during transportation.
• Do not drop any Unit or subject any Unit to excessive shock or vibration.
Otherwise, Unit failure or malfunction may occur.
• Mount the Units securely using DIN Track, a Mounting Bracket, or screws.
• Make sure that all Slave Unit mounting screws and cable connector
screws are tightened to the torque specified in the relevant manuals.
Incorrect tightening torque may result in malfunction.
• Make sure that the terminal blocks, communications cables, and other
items with locking devices are properly locked into place. Improper locking
may result in malfunction.
• When installing the Units, ground to 100
Ω
min.
• Wire all connections correctly according to instructions in the manual.
• Always separate Special Flat Cables (Standard and Sheathed) for differ-
ent CompoNet systems by at least 5 mm to prevent unstable operation
due to interference. Do not bundle Special Flat Cables.
• Do not extend connection distances or the number of connected nodes
beyond the ranges given in the specifications.
• Do not allow foreign matter to enter the Units when wiring and installing
the Units.
• Use the correct wiring materials to wire the Units.
• Use the correct tools to wire the Units.
• Always use the specified communications cables and connectors.
• Confirm the polarity of all terminals before wiring them.
• Make sure that all terminal block screws are tightened to the torque spec-
ified in this manuals. Incorrect tightening torque may result in fire, mal-
function, or failure.
• Always use the power supply voltage specified in this manual.
• Do not bend cables past their natural bending radius or pull on cables.
• Observe the following precautions when wiring the communications
cable.
• Separate the communications cables from the power lines or high-ten-
sion lines.
• Do not bend the communications cables past their natural bending ra-
dius.
• Do not pull on the communications cables.
• Do not place heavy objects on top of the communications cables.
• Always lay communications cable inside ducts.