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Sigma II User's Manual
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Correct Grounding
Grounding the Motor Frame
Always connect servomotor frame terminal FG to the servo amplifier ground termi-
nal
. 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 ground-
ing of the motor frame is required to prevent the adverse effects of switching noise.
Noise on the Reference Input Line
If the reference input line is affected by noise, ground the 0V line (SG) of the refer-
ence input line. If the main circuit wiring for the motor is accommodated in a metal
conduit, ground the conduit and its junction box.
All grounds must be made to only one point in the system.
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Using Noise Filters
Use a noise suppression filter to prevent noise generated by the power supply line.
Install a noise filter on the power supply line for peripheral equipment as necessary.
The following table recommends noise filters for each servo amplifier model.
Servo Amplifier Model
SGDH–A3AE to –02AE
SGDH–A3BE to –01BE
SGDH–02BE
SGDH–04AE
SGDH–05AE to –20AE
SGDH–30AE
Note: Filters manufactured by Tokin Corp. are available from Yaskawa. Please contact Yaskawa or an
authorized distributor.
Recommended Noise Filter
Model
SUP–P5H–EPR
Okaya Electric Company
SUP–P8H–EPR
SUP–P10H–EPR
LF–3200
Tokin Corp.
LF–3300
5-106
Chapter 5: Parameter Settings and Functions
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Manufacturer
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