Omron OMNUC R88D-WT15HF User Manual page 244

System Design and Installation
conditions were stipulated when EMC Directive approval was obtained for the W Series.
They will be affected by the installation and wiring conditions resulting from the con-
nected devices and wiring when the W Series is built into the system. Therefore, the en-
tire system must be checked for conformity.
The following conditions must be satisfied in order to conform to the EC Directives.
• The Servo Driver must be mounted in a metal case (control box). (It is not necessary to mount the
Servomotor in a metal box.)
• 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
Surge
power
absorber
supply
2 m max.
Class-3
ground (to
100 Ω 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.
• 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.
Brake
Noise
power
filter
supply
Contactor
Noise
filter
Controller
power
supply
Ferrite
(See note 3.) core
Ferrite
core
Clamp
Ferrite core
Clamp
Ferrite core
Controller
Chapter 3
Motor built-in device
Metal
duct or
conduit
Ferrite
core
Ferrite
core
3-29