Precautions On Connecting Noise Filter - YASKAWA E-V-MD Series User Manual

(2) Correct Grounding
Take the following grounding measures to prevent the malfunction due to noise.
 Grounding the Motor Frame
If the servomotor is grounded through the machine, switching noise current will flow from the main circuit of
the SERVOPACK through the floating capacitance of the servomotor. To prevent the adverse effects of
switching noise, always connect the motor frame terminal (FG) on the servomotor to the ground pin
servomotor connector.
 Noise on the I/O Signal Cable
If the I/O signal cable picks up noise, ground the 0 V line (SG) of the I/O signal cable. If the servomotor/
encoder relay cable is placed in a metal conduit, ground the conduit and its junction box. For all grounding,
ground at one point only.

5.6.2 Precautions on Connecting Noise Filter

This section describes the precautions on installing a noise filter.
(1) Noise Filter Brake Power Supply
If using a servomotor with a holding brake, use the following noise filter on the brake power supply input.
Model: FN2070-6/07 (Manufactured by SCHAFFNER Electronic.)
(2) Precautions on Using Noise Filters
Always observe the following installation and wiring instructions.
Do not put the input and output lines in the same duct or bundle them together.
Incorrect
Ground plate
Ground plate
Some noise filters have large leakage currents. The grounding measures taken also
affects the extent of the leakage current. If necessary, select an appropriate leakage cur-
rent detector or leakage current breaker taking into account the grounding measures that
are used and leakage current from the noise filter. Contact the manufacturer of the noise
filter for details.
Noise
Filter
Ground plate
Noise
Filter
Ground
plate
5.6 Noise Control and Measures for Harmonic Suppression
Correct
Noise
Filter
Noise
Filter
Separate these circuits.
on the
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