Omron C200HE-CPU42-E Instruction Manual page 96

Wiring
Using the Antinoise Insulating Attachment
Dimensions (Unit: mm)
Insulating Method for Backplanes
Precautions
Power Interruptions
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This circuit prevents outputs MC1 and MC2 from ever both being ON at the same
time. Even if the PC is programmed improperly or malfunctions, the motor is pro-
tected.
When using the C200HX/HG/HE CPU Unit near a power supply system,
unwanted current paths may cause operating errors. If this occurs, use an Anti-
noise Insulating Attachment. If this Attachment is connected to the CPU Back-
plane and all Expansion I/O Backplanes, the PC will be insulated from the con-
trol panel. This will prevent external noise from entering the PC.
Antinoise Insulating Attachments must be purchased separately using the fol-
lowing model number.
Model
C200HW-ATT01
As shown in the following diagram, connect the Attachments to the control panel
first (four locations) and then tighten the screws. The recommended tightening
torque is 1.2 N S m.
Control panel
• Always attach the Attachments as shown above.
• When the Attachments are used to mount the Backplanes, the height of the
Rack will be increased by approximate 10 mm. Confirm that the front of the
Units, cables, or other parts of the PC do not come into contact with other
devices.
• If the installation environment is subject to noise, then noise can also enter on
the power supply line. If necessary, use noise filters or insulating transformers
to remove noise from the power supply line.
A sequential circuit is built into the PC to handle power interruptions. This circuit
prevents malfunctions due to momentary power loss or voltage drops. A timing
diagram for the operation of this circuit is shown below.
The PC ignores all momentary power failures if the interruption lasts no longer
than 10 ms (no longer than 2 ms for a DC Power Supply). If the interruption lasts
Quantity
Four attachments included
Screw
Attachment
Backplane
Section 3-2
79