![background image](http://html1.mh-extra.com/html/omron/nx-ecc201/nx-ecc201_user-manual_742778131.webp)
6 - 31
6 Installation
NX-series EtherCAT Coupler Unit User’s Manual (W519)
6-2 C
o
n
trol Pan
el Inst
allation
6
6-
2-6 Groun
ding
Grounding has the following two purposes.
• Protective Grounding
Protective grounding is done to ensure safety. It is intended to prevent electrical shock by grounding
the electrical potential that is generated by factors such as leakage, induction, or failure.
• Functional Grounding
Functional grounding is done to protect device and system functions, including prevention of noise
from external sources, or prevention of noise from devices or equipment that could have harmful
effects on other devices or equipment.
Grounding requirements sometimes depend on the situation, and they may be found based on experi-
mentation. It is important to sufficiently check the particular circumstances before grounding.
Principles of One-point Grounding
For devices to operate properly, the reference potential between the devices must be stabilized. Use
one-point grounding so that noise current does not flow to ground lines between the devices.
Whenever possible, use an independent ground (with the ground pole separated by a minimum of
10 m from any other ground pole).
• Ground to 100
Ω
or less, and if possible use a separate ground from those of other devices. (See
following figure (a).)
• If using an independent ground is not possible, then use a common ground as shown in figure (b).
Connect to the ground pole of the other device.
• Never connect to the same ground as a device that draws a large amount of power, such as a
motor or inverter. Ground the devices separately to avoid mutually adverse influences.
• To prevent electrical shock, do not connect to ground poles to which multiple devices are con-
nected.
• Use a ground pole as close to the EtherCAT Slave Terminal as possible and keep the ground line
as short as possible.
Grounding Methods
6-2-6
Grounding
Wire Layout for the Power Supply System
(a) Independent Grounds: Best
(b) Common Ground: Acceptable
(c) Common Ground: Incorrect
Ground to
100 Ω or less
Other
device
DIN Track
DIN Track
DIN Track
EtherCAT
Slave
Terminal
EtherCAT
Slave
Terminal
EtherCAT
Slave
Terminal
Other
device
Other
device
NG
OK
OK
Summary of Contents for NX-ECC201
Page 38: ...Sections in this Manual 36 NX series EtherCAT Coupler Unit User s Manual W519...
Page 46: ...1 EtherCAT Networks 1 8 NX series EtherCAT Coupler Unit User s Manual W519...
Page 56: ...2 Features and System Configuration 2 10 NX series EtherCAT Coupler Unit User s Manual W519...
Page 82: ...4 Part Names and Functions 4 14 NX series EtherCAT Coupler Unit User s Manual W519...
Page 100: ...5 Designing the Power Supply System 5 18 NX series EtherCAT Coupler Unit User s Manual W519...
Page 214: ...9 Setting Up Slave Terminals 9 44 NX series EtherCAT Coupler Unit User s Manual W519...
Page 254: ...11 EtherCAT Coupler Unit Functions 11 30 NX series EtherCAT Coupler Unit User s Manual W519...
Page 278: ...12 Communications Performance 12 24 NX series EtherCAT Coupler Unit User s Manual W519...
Page 340: ...14 Maintenance and Inspection 14 8 NX series EtherCAT Coupler Unit User s Manual W519...
Page 400: ...Appendices A 60 NX series EtherCAT Coupler Unit User s Manual W519...
Page 401: ...Index 1 NX series EtherCAT Coupler Unit User s Manual W519 I Index...
Page 405: ......