Toshiba nv Series - Grounding of the Controller

1.7 Grounding of the Controller
Unified Controller nv series type2 light Controller Unit Instruction Manual
19
1.7 Grounding of the Controller
It is ideal to ground the controller unit separately from the power system and ground two
or more controller units to a single point. Unified controller nv series are designed to be
noise-proof taking the actual application into consideration and the equipment is fully
noise-proof. However, grounding is very important to maintain the safety and secure
safety operation of the system. Take the following items into consideration to correctly
ground the equipment.
■ Points of grounding
Pay attention to the following points to ground the unit.
・ The controller unit should not stand in the way of the grounding current of other
devices.
Pay attention especially to the high frequency current.
・ The grounding potential of the controller unit should be equal to that of I/O units.
Ground them to a single point.
・ Do not ground the unit to the power system.
High-frequency isolation is required.
・ Do not ground the unit to unstable parts.
Do not connect the unit to parts that have unstable impedance and are subject to
vibration to places such as screwed painted area.