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Chapter 3
3-20
System Design and Installation
●
Three-phase Power Supply Input (R7D-AP08H)
• Ground the motor’s frame to the machine ground when the motor is on a movable shaft.
• Use a grounding plate for the frame ground for each Unit, as shown in the above diagrams, and
ground to a single point.
• Use ground lines with a minimum thickness of 3.5 mm
2
, and arrange the wiring so that the ground
lines are as short as possible.
• If no-fuse breakers are installed at the top and the power supply line is wired from the lower duct,
use metal tubes for wiring and make sure that there is adequate distance between the input lines
and the internal wiring. If input and output lines are wired together, noise resistance will decrease.
• No-fuse breakers, surge absorbers, and noise filters (NF) should be positioned near the input termi-
nal block (ground plate), and I/O lines should be isolated and wired using the shortest distance pos-
sible.
• Insert a fuse for short-circuit failure protection if a surge absorber is installed. As a guideline, select
a fuse with three times the maximum instantaneous current.
• Wire the noise filter as shown at the left in the following illustration. The noise filter should be
installed at the entrance to the control box whenever possible.
• Use twisted-pair cables for the power supply cables whenever possible, or bind the cables.
NFB
AC power
supply
Surge absorber
Noise filter
Contactor
X1
Metal duct
Fuse
Controller power supply
Thick power line (3.5 mm
2
)
Machine ground
Ground plate
Ground control box
3.5 mm
2
1
2
3
4
5
6
E
NF
TB
L1
L2
L3
L1C
L2C
U
V
W
TB
CN2
R7D-AP
@
R7M-A
@
E
M
2 mm
2
Class D ground
(Class 3 ground:
100
Ω
or less)
Correct: Separate input and output
Wrong: Noise not filtered effectively
AC output
AC input
AC input
AC output
Ground
NF
1
2
3
4
5
6
E
NF
1
2
3
4
5
6
E
Ground
Содержание SMARTSTEP A Series
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Страница 141: ...Chapter 3 System Design and Installation 3 1 Installation Conditions 3 2 Wiring 3 3 Regenerative Energy Absorption ...
Страница 214: ...Chapter 4 4 32 Operation Linear Acceleration and Deceleration Speed Command pulse input frequency Time Pn208 Pn208 ...
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Страница 233: ...Chapter 6 Appendix 6 1 Connection Examples ...
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Страница 250: ...R 2 Revision History ...