5 Wiring
5.4.2 Wiring for Noise Control
5-14
(2) Grounding
(a) 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 SERVOPACK
power unit through motor stray capacitance. The above grounding is required to prevent the adverse effects
of switching noise.
(b) SynqNet Communication Cable
Make sure to keep the box or power line separate from the SynqNet communication cable because the cable
is easily influenced by noise.
If noise is a problem, coil the communication cable two turns around the ferrite cores on the SERVOPACK
end and the controller end. Refer to the following diagram.
(c) 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 cir-
cuit 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.
(3) Using Noise Filters
Use an inhibit type noise filter to prevent noise from the power supply line. The following table lists recom-
mended noise filters for each SERVOPACK model.
Install a noise filter on the power supply line for peripheral equipment as necessary.
Recommended core: ZCAT2436-1330 TDK
Cable
Ferrite
Core
Noise Filters
Voltage
SERVOPACK Model
Recommended Noise Filters
Capacity
(kW)
SGDS-
Model
Specification
Manufacturer
Single-phase
100 V
0.05
A5F
FN2070-6/07
Single-phase 250 VAC, 6 A
Schaffner Elektronik
0.10
01F
0.20
02F
FN2070-10/07
Single-phase 250 VAC, 10 A
0.40
04F
FN2070-16/07
Single-phase 250 VAC, 16 A
Single-phase
200 V
0.05
A5A
FN2070-6/07
Single-phase 250 VAC, 6 A
0.10
01A
0.20
02A
0.40
04A
FN2070-10/07
Single-phase 250 VAC, 10 A
0.75
08A
FN2070-16/07
Single-phase 250 VAC, 16 A
Three-phase
200 V
1.0
10A
FN258L-16/07 Three-phase 480 VAC, 16 A
1.5
15A
2.0
20A
3.0
30A
FN258L-30/07 Three-phase 480 VAC, 30 A
SIEPS80000025.book 14 ページ ２００４年１０月２５日 月曜日 午前１１時５７分
