Chapter 1 IntroductionC2000-HS
1-6
Figure 1-5 Figure 1-6
Pay particular attention to the following points:
Do not remove the RFI jumper while the power is on.
Removing the RFI jumper also disconnects the built-in EMC filter capacitors. Compliance with the EMC
specifications is no longer guaranteed.
Do not remove the RFI jumper if the mains power is a symmetrical grounded power system in order to
maintain the efficiency for EMC circuit.
Do not remove the RFI jumper while conducting high voltage tests. When conducting a high voltage
test to the entire facility, you must disconnect the mains power and the motor if the leakage current is
too high.
Floating Ground System (IT Systems)
A floating ground system is also called IT system, ungrounded system, or high impedance/resistance
(greater than 30Ω) grounding system.
Disconnect the ground cable from the internal EMC filter.
In situations where EMC is required, check whether there is excess electromagnetic radiation affecting
nearby low-voltage circuits. In some situations, the adapter and cable naturally provide enough
suppression. If in doubt, install an extra electrostatic shielded cable on the power supply side between
the main circuit and the control terminals to increase security.
Do not install an external RFI/EMC filter, the EMC filter will pass through a filter capacitor, thus
connecting power input to ground. This is very dangerous and can easily damage the Power
Regenerative Unit.
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