Omron CK3E Series Hardware User Manual page 74

4 Mounting and Wiring
Connect the ground line of each control panel to the equipotential bonding system.
Earth trunk line
Information device
Control panel
Equipotential bonding conductor
Building structure
Star Earthing
If the earthing method used for the building is not equipotential bonding or the earthing system is un-
known, choose (a) from the earthing methods given below.
a. Installation method by connecting devices and noise sources to separate earth electrodes
This is an earthing method to separately ground an earth electrode of the device that is connected
with a communications cable or other devices and an earth electrode of a high-power device that
could be a noise source, such as a motor or inverter. Each earth electrode must be ground to 100
Ω or less.
Connect the ground lines of the device that is connected with a communications cable and other
devices as a bundle to a single earth electrode. Be sure that the earth electrode is separated by a
minimum of 10 m from any other earth electrode of a device that could be a noise source.
Control panel Other device
4-24
Power device
Metal duct and pipe
Control panel Control panel
Hub Noise source
Metal structure in floor
Main earthing terminal
Earth electrode
Motion Controller
Hub
10 m min.
CK3E-series Programmable Multi-Axis Controller User's Manual Hardware (I610)
A device that could be
a noise source
PLC