Omron 8U0108-E1-01, User Manual

Page: 289 / 333

XtraDrive User Manual Appendix B: Special Wiring
B-5
B.2. Wiring for Noise Control
Wiring Example
This servo amplifier uses high-speed switching elements in the main
circuit. It may receive “switching noise” from these high-speed
switching elements if wiring or grounding around the servo amplifier is
not appropriate. To prevent this, always wire and ground the servo
amplifier correctly.
This servo amplifier has a built-in microprocessor (CPU). To protect it
from external noise install a noise filter in the appropriate place.
The following is an example of wiring for noise control.
Ω
Note: * When using a noise filter, follow the precautions in Using Noise Filters on the following page.
** For ground wires connecting to the casing, use a wire with a thickness of at least 0.005in
2
(3.5mm
2
),
preferably a braided flat copper wire.
Correct Grounding
Grounding the Motor Frame
Always connect servomotor’s frame terminal FG to the XtraDrive’s
ground terminal . Also be sure to ground the ground terminal .
If the servomotor is grounded via the machine, switching noise current
will flow from the servo amplifier power unit through motor stray
capacitance. The grounding of the motor frame is required to prevent
the adverse effects of switching noise.