Summa Series Servodrive Product Manual
Wiring and Connecting
Document Version: V1.01
(Dec, 2019)
© 2019 ESTUN Automation Co., Ltd. All right reserved.
3-5
If a Noise Filter is located inside a control panel, first connect the Noise Filter ground wire and the
ground wires from other devices inside the control panel to the grounding plate for the control panel,
then ground the plate.
Drive
Drive
Noise Filter
Ground Plate
Grounding
Control Cabinet
3.1.3
Grounding
Implement grounding measures as described in this section. Implementing suitable grounding measures
will also help prevent malfunctions, which can be caused by noise.
Observe the following precautions when wiring the ground cable.
Ground the Drive to a resistance of 100 mΩ or less.
Be sure to ground at one point only.
Ground the Motor directly if the Motor is insulated from the machine.
Motor Frame Ground or Motor Ground
If you ground the Motor through the machine, switching noise current can flow from the main circuit of
the Drive through the stray capacitance of the Motor. To prevent this, always connect the Motor frame
terminal (FG) or ground terminal (FG) of the Motor to the ground terminal
on the Drive. Also be sure
to ground the ground terminal
.
Noise on I/O Signal Cables
If noise enters the I/O Signal Cable, connect the shield of the I/O Signal Cable to the connector shell to
ground it. If the Motor Main Circuit Cable is placed in a metal conduit, ground the conduit and its
junction box. For all grounding, ground at one point only.
