Application Precautions - Omron 3G8F5-DRM21 Operation Manual

Application Precautions

5

Application Precautions

WARNING
!
Caution
!
Observe the following precautions when using the CompoBus/D (DeviceNet)
Configurator.
Failure to abide by the following precautions could lead to serious or possibly
fatal injury. Always heed these precautions.
• Always connect to a class-3 ground (100 Ω or less) when installing the Units.
• Always turn off the power supply to the personal computer before attempting
any of the following.
• Assembling the Units.
• Setting DIP switches or rotary switches.
• Connecting or wiring the cables.
Failure to abide by the following precautions could lead to faulty operation or the
PC or the system or could damage the PC or PC Units. Always heed these pre-
cautions.
• Fail-safe measures must be taken by the customer to ensure safety in the
event of incorrect, missing, or abnormal signals caused by broken signal lines,
momentary power interruptions, or other causes.
• Interlock circuits, limit circuits, and similar safety measures must be provided
by the customer as external circuits, i.e., not in the Programmable Controller.
• Always use the power supply voltage specified in this manual.
• Take appropriate measures to ensure that the specified power with the rated
voltage and frequency is supplied. Be particularly careful in places where the
power supply is unstable.
• Install external breakers and take other safety measures against short-circuit-
ing in external wiring.
• Do not attempt to disassemble, repair, or modify any Units.
• Be sure that all cable connector screws are tightened to the torque specified in
this manual.
• Use crimp terminals for wiring. Do not connect bare stranded wires directly to
terminals.
• Double-check all the wiring before turning on the power supply.
• Wire correctly.
• Be sure that the communications cables and other items with locking devices
are properly locked into place.
• Check the user program for proper execution before actually running it in the
Unit.
• Observe the following precautions when wiring the communications cable.
• Separate the communications cables from the power lines or high-tension
lines.
• Do not bend the communications cables.
• Do not pull on the communications cables.
• Do not place heavy objects on top of the communications cables.
• Be sure to wire communications cable inside ducts.
• Use appropriate communications cables.
• Do not use inappropriate cables or crimp terminals.
• Provide proper shielding when installing in the following locations:
• Locations subject to static electricity or other sources of noise.
• Locations subject to strong electromagnetic fields.
• Locations subject to possible exposure to radiation.
• Locations near to power supply lines.
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