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Chapter 2 Installation
2.4 Grounding
The electrical devices should be grounded separately from power system and the two
or more electrical devices should be grounded at a single point. The model 3000 is
designed to resist actual noise and the device is sufficiently capable of withstanding
noise, but grounding is very important in order to assure safe and stable system
operation. Observe the following instructions and provide proper grounding.
When using the Ethernet module, refer to the 'Ethernet installation and Wiring Guide'
(6F8C0879)
Always ground the model 3000.
Failing to ground the unit can cause electrocution or malfunction.
2.4.1
Grounding Tips
Note the following when grounding:
(1) The model 3000 unit must not be a conductor for grounding current of other
devices.
(Especially, high frequency current can cause trouble.)
(2) The grounding potential of the model 3000 base and expansion unit must be equal.
(Ground at single point.)
(3) Do not connect to ground of motorized system (require high frequency separation)
(4) Do not connect to unstable ground (parts with unstable impedance such as
screwed on painted parts or parts affected by vibration)
16
CAUTION
Computer m
odule C3PU35 User's Manual
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