Grounding, Check points for grounding, Grounding of controi panei – Toshiba Programmable Controller PROSEC T3 User Manual
Page 70: 5 grounding, Installation and wiring
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4. Installation and Wiring
4.5
Grounding
Check points for
grounding
Grounding of
controi panei
To maintain the safety and stable operation of the T3, grounding is
very important. Read and follow the check points below before
grounding.
Check the grounding against the following criteria:
(1) The T3 must not become a path for ground current. High-
frequency current is particularly harmful.
(2) Equalize the ground potentials of the basic and the
expansion units. Ground them at a single point.
(3) Do not connect the ground of the T3 to that of high-power
systems.
(4) Do not use a ground that has an unstable impedance, such
as painted screws, or grounds subject to vibration.
In some cases, the T3 unit becomes a path of ground current from a
power panel or high-frequency equipments.
^Change
Isolate the T3 mounting
panel and connect to the
ground point separately.
Isolate the T3 from the
mounting frame and connect
to the ground point separately.
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PROSEC T3