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User Constant Settings and Functions
5.8.2 Wiring for Noise Control
5 -110
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Correct Grounding
Grounding the Motor Frame
Always connect servomotor frame terminal FG to the Servopack ground terminal
. Also be
sure to ground the ground terminal
.
If the servomotor is grounded via the machine, a switching noise current will flow from the Ser-
vopack power unit through motor stray capacitance. The above grounding isrequired to prevent
the adverse effects of switching noise.
Noise on the Reference Input Line
If the reference input line receives noise, ground the 0 V line (SG) of the reference input line.
If the main circuit wiring for the motor is accommodated in a metal conduit, ground the conduit
and its junction box. For all grounding, ground at one point only.
All grounds must be made to only one point in the system.
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Using Noise Filters
Use an inhibit type noise filter to prevent noise from the power supply line. The following table
lists recommended noise filters for each Servopack model.
Install a noise filter on the power supply line for peripheral equipment as necessary.
Table 5.2
Noise Filters
Voltage
Servopack Model
Recommended Noise Filter
Voltage
Servopack Model
Model
Manufacturer
Single-phase
100 V
SGDH-A3BE to -01BE
FN2070-6/07
100 V
SGDH-02BE
FN2070-10/07
Single-phase
200 V
SGDH-A3AE to -02AE
FN2070-6/07
200 V
SGDH-04AE
FN2070-10/07
SCHAFFNER
SGDH-08AE-S
FN2070-16/07
SCHAFFNER
SGDH-15AE-S
FN350-30/33
Three-phase
200 V
SGDH-05AE to -20AE
FN258L-7/07
200 V
SGDH-30AE
FN258L-30/07
SGDH-50AE, -60AE
FNAC0934-5010
TIMONTA
SGDH-75AE
FNAC0934-6410
TIMONTA
SGDH-1AAE, -1EAE
FS5559-150-35
SCHAFFNER
5
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