Application Precautions - Omron WS02-9094G - V1.0 Operation Manual

Application Precautions

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Application Precautions

!WARNING
!Caution Failure to abide by the following precautions could lead to faulty operation or
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Observe the following precautions when using the PROFIBUS Master Unit.
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
Units.
the PLC or the system or could damage the PLC or PLC Units. Always heed
these precautions.
• Install double safety mechanisms to ensure safety against incorrect sig-
nals 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 nodes.
• When adding a new slave device to the network, make sure that the
PROFIBUS Master Unit is in the OFFLINE state, to prevent unexpected
results when starting up the slave device.
• Use specified communications cables.
• Do not extend connection distances beyond the ranges given in the spec-
ifications.
• Always turn OFF the power supply to the personal computer, Slaves, and
Communications Units before attempting any of the following.
• Mounting or dismounting the PROFIBUS Master 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 the terminal blocks, connectors, Memory Units, expansion
cables, and other items with locking devices are properly locked into
place. Improper locking may result in malfunction.
• 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 malfunc-
tion.
• Leave the label attached to the Unit when wiring. Removing the label may
result in malfunction if foreign matter enters the Unit.
• Remove the label after the completion of wiring to ensure proper heat dis-
sipation. Leaving the label attached 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 con-
nectors before mounting the Units.
• Use crimp terminals for wiring. Do not connect bare stranded wires
directly to terminals.
Ω
or less) when installing the
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