Omron SMARTSTEP R7D-AP Series User Manual page 168

System Design and Installation
● Three-phase Power Supply Input (R7D-AP08H)
Control panel
Metal plate
2 m max.
Metal
AC
duct or Surge
power
conduit
absorber
supply
NFB
2 m max.
Class D
ground
(Class 3
ground:
100 Ω or
less)
Ground
plate
Note 1. The cable wiring for the ferrite core must be 1.5 turns.
Note 2. Remove the sheath from the cable and ground it directly to the metal plate at the clamps.
• 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
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.
• 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.
Correct: Separate input and output
AC input
1
2
3
Ground
3-28
Brake
Noise
power
filter
supply
Contactor
Noise
filter
Controller
power supply
AC output
4
NF
5
6
E
R7D-A@
Ferrite
core
L1 U
L2 V
L3 W
L1C
L2C
Ferrite
core
CN2
Clamp
CN1
Ferrite core
Clamp
Ferrite core
Controller
2
, and arrange the wiring so that the ground
Wrong: Noise not filtered effectively
AC input
1
2
3
Ground
AC output
Chapter 3
Installation incorporating
Servo Motor
R7M-A@
Metal
duct or B
Ferrite
conduit
core
M
Ferrite
core
E
4
NF
5
6
E