Omron OMNUC W Series User Manual page 195

System Design and Installation
• Noise filters and surge absorbers must be inserted in power supply lines.
• Shielded cable must be used for I/O signal cables and encoder cables. (Use tinned soft steel wire.)
• Cables leading out from the control box must be enclosed within metal ducts or conduits with blades.
(It is not necessary to enclose the 30-cm power cable, encoder cable, or connectors in a metal duct or
conduit.)
• Ferrite cores must be installed for cables with braided shields, and the shield must be directly
grounded to a ground plate.
H Wiring Method
Control box
2 m max.
Metal
duct or
AC
conduit
power
supply
2 m max.
Class-3
ground (to
100Ω or less)
Ground
plate
Note 1. Make 1.5 turns for the ferrite core's cable winding.
Note 2. Peel the insulation off the cable at the clamp, and directly connect the shield to the metal plate.
Note 3. For single-phase power supply input models (R88D-WTA3Hj to R88D-WT04H), the main-
circuit power supply input terminals will be L1 and L2. For single-phase powersupply models
(R88D--WT08HH and R88D-WT15HH), the main circuit powersupply will be L1 and L3
• 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
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 should be positioned near the input terminal
block (ground plate), and I/O lines should be isolated and wired using the shortest distance possible.
AUDIN - 7 bis rue de Tinqueux - 51100 Reims - France - Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : info@audin.fr
Brake
Noise
power
filter
supply
Surge
absorber
Noise
filter
Controller
power
supply
Contactor
Ferrite
core
Clamp
Ferrite core
Clamp
Ferrite core
Controller
2
, and arrange the wiring so that the ground lines
Chapter 3
Motor built-in device
Metal
duct or
conduit
Ferrite
Ferrite
core
core
Ferrite
core
3-29