Grounding Of Controller Unit And I/O Unit - Toshiba NV Series Hardware Manual

Chapter 3 Installation and Wiring
3.4

Grounding of Controller Unit and I/O Unit

T series Migration system should be exclusively grounded separate from the power system.
T series migration system is designed to be noise tolerable by considering the practical
application and the device itself has a sufficient noise immunity. Still, grounding is very
important to keep the system safety and stable operation. Fully consider the following items
and ground properly.
 Points for grounding
Pay attention to the following points when grounding.
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6F8C1497
(1) T series migration system shall not be a path for a ground current of other
equipment
Particularly, be careful with high-frequency currents.
(2) The ground potential shall be equivalent on the T series migration system
Connect to a single-point ground.
(3) Do not connect to the power system grounding
High-frequency isolation is required.
(4) Do not connect to unstable grounds
Do not connect to portions which are unstable in impedance or are subject to
vibration, such as painted screws.
Ground the device.
Warning
Operation without grounding may cause electric shock
or fire.
Ground