NE1A Series EtherNet/IP-DeviceNet Router:
NE1A-EDR01
Operation Manual
Produced July 2007
iv
Notice:
OMRON products are manufactured for use according to proper procedures by a qualified operator
and only for the purposes described in this manual.
The following conventions are used to indicate and classify precautions in this manual. Always heed
the information provided with them. Failure to heed precautions can
result in injury to people or damage to property.
!WARNINGIndicates a potentially hazardous situation which, if not avoided, will result in minor or
moderate injury, or may result in serious injury or death. Additionally, there may be significant property damage.
!CautionIndicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury, or property damage.
Indicates general prohibitions for which there is no specific symbol.
Indicates general mandatory actions for which there is no specific symbol.
OMRON Product References
All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers to
an OMRON product, regardless of whether or not it appears in the proper name of the product.
The abbreviation “PLC” means Programmable Controller. “PC” is used, however, in some Programming Device displays to mean Programmable Controller.
Visual Aids
The following headings appear in the left column of the manual to help you locate different types of
information.
IMPORTANT Indicates important information on what to do or not to do to prevent failure to
operation, malfunction, or undesirable effects on product performance.
Note Indicates information of particular interest for efficient and convenient opera-
tion of the product.
1,2,3...1. Indicates lists of one sort or another, such as procedures, checklists, etc.
v
Trademarks and Copyrights
r
f
CIP, EtherNet/IP, DeviceNet, and DeviceNet Safety are registered trademarks of the Open DeviceNet
Vendors Association.
Windows is a registered trademark of Microsoft Corporation.
Other product names and company names in this manual are trademarks or registered trademarks of
their respective companies.
OMRON, 2007
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, o
by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission o
OMRON.
No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is constantly striving to improve its high-quality products, the information contained in this manual is subject to change without
notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no responsibility
for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained in
this publication.
This manual describes the installation and operation of the NE1A-EDR01 EtherNet/IP-DeviceNet
Router. The NE1A-EDR01 EtherNet/IP-DeviceNet Router was developed using OMRON‘s advanced
control technology and vast know-how. It functions to route FA data between EtherNet/IP and
DeviceNet networks.
Please read this manual carefully and be sure you understand the information provided before
attempting to install or operate the NE1A-EDR01 EtherNet/IP-DeviceNet Router. The following manuals are also related to the NE1A-EDR01 EtherNet/IP-DeviceNet Router or NE1A-series Safety Network Controllers. Refer to these manuals as required during installation and operation.
This manual describes the DST1-series Slave models, specifications, functions, and application methods in detail.
DeviceNet Operation Manual (W267)
This manual describes the construction and connection of a DeviceNet network. It provides detailed
information on the installation and specifications of cables, connectors, and other peripheral equipment used in the network, and on the supply of communications power. Obtain this manual and gain a
firm understanding of its contents before using a DeviceNet system.
ix
x
Read and Understand this Manual
Please read and understand this manual before using the product. Please consult your OMRON
representative if you have any questions or comments.
Warranty and Limitations of Liability
WARRANTY
OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a
period of one year (or other period if specified) from date of sale by OMRON.
OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NONINFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE
PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS
DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR
INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.
LIMITATIONS OF LIABILITY
OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT
LIABILITY.
In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which
liability is asserted.
IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS
REGARDING THE PRODUCTS UNLESS OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS
WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO
CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.
xi
Application Considerations
SUITABILITY FOR USE
OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the
combination of products in the customer's application or use of the products.
At the customer's request, OMRON will provide applicable third party certification documents identifying
ratings and limitations of use that apply to the products. This information by itself is not sufficient for a
complete determination of the suitability of the products in combination with the end product, machine,
system, or other application or use.
The following are some examples of applications for which particular attention must be given. This is not
intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the uses
listed may be suitable for the products:
• Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or
uses not described in this manual.
• Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical
equipment, amusement machines, vehicles, safety equipment, and installations subject to separate
industry or government regulations.
• Systems, machines, and equipment that could present a risk to life or property.
Please know and observe all prohibitions of use applicable to the products.
NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR
PROPERTY WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO
ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE PROPERLY RATED AND INSTALLED
FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.
PROGRAMMABLE PRODUCTS
OMRON shall not be responsible for the user's programming of a programmable product, or any
consequence thereof.
xii
Disclaimers
CHANGE IN SPECIFICATIONS
Product specifications and accessories may be changed at any time based on improvements and other
reasons.
It is our practice to change model numbers when published ratings or features are changed, or when
significant construction changes are made. However, some specifications of the products may be changed
without any notice. When in doubt, special model numbers may be assigned to fix or establish key
specifications for your application on your request. Please consult with your OMRON representative at any
time to confirm actual specifications of purchased products.
DIMENSIONS AND WEIGHTS
Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when
tolerances are shown.
PERFORMANCE DATA
Performance data given in this manual is provided as a guide for the user in determining suitability and does
not constitute a warranty. It may represent the result of OMRON's test conditions, and the users must
correlate it to actual application requirements. Actual performance is subject to the OMRON Warranty and
Limitations of Liability.
ERRORS AND OMISSIONS
The information in this manual has been carefully checked and is believed to be accurate; however, no
responsibility is assumed for clerical, typographical, or proofreading errors, or omissions.
This manual is intended for the following personnel, who must have knowledge of electrical systems (an electrical engineer or the equivalent).
• Personnel in charge of introducing FA and safety systems into production
facilities
• Personnel in charge of designing FA and safety systems
• Personnel in charge of managing FA facilities
• Personnel who have the qualifications, authority, and obligation to provide
safety during each of the following product phases: mechanical design,
installation, operation, maintenance, and disposal
2General Precautions
The user must operate the product according to the performance specifications described in the operation manuals.
Before using the product under conditions which are not described in the
manual or applying the product to nuclear control systems, railroad systems,
aviation systems, vehicles, combustion systems, medical equipment, amusement machines, safety equipment, and other systems, machines, and equipment that may have a serious influence on lives and property if used
improperly, consult your OMRON representative.
Make sure that the ratings and performance characteristics of the product are
sufficient for the systems, machines, and equipment, and be sure to provide
the systems, machines, and equipment with double safety mechanisms.
This manual provides information for programming and operating the Unit. Be
sure to read this manual before attempting to use the Unit and keep this manual close at hand for reference during operation.
!WARNING It is extremely important that a PLC and all PLC Units be used for the speci-
fied purpose and under the specified conditions, especially in applications that
can directly or indirectly affect human life. You must consult with your OMRON
representative before applying a PLC System to the above-mentioned applications
3Precautions for Safe Use
■ Handling with Care
Do not drop the EtherNet/IP-DeviceNet Router or subject it to excessive vibration or mechanical shock. The EtherNet/IP-DeviceNet Router may be damaged and may not function properly.
■ Installation and Storage Environment
Do not use or store the EtherNet/IP-DeviceNet Router in any of the following
locations:
• Locations subject to direct sunlight
• Locations subject to temperatures or humidity outside the range specified
in the specifications
• Locations subject to condensation as the result of severe changes in temperature
• Locations subject to corrosive or flammable gases
• Locations subject to dust (especially iron dust) or salts
xvi
Precautions for Safe Use3
• Locations subject to water, oil, or chemicals
• Locations subject to shock or vibration
Take appropriate and sufficient measures when installing systems in the following locations. Inappropriate and insufficient measures may result in malfunction.
• Locations subject to static electricity or other forms of noise
• Locations subject to strong electromagnetic fields
• Locations subject to possible exposure to radioactivity
• Locations close to power supplies
■ Installation and Mounting
• Use the EtherNet/IP-DeviceNet Router within an enclosure with IP54 protection or higher according to IEC/EN 60529.
• Use DIN rail (TH35-7.5/TH35-15 according to IEC 60715) to install the
EtherNet/IP-DeviceNet Router into the control panel. Mount the EtherNet/
IP-DeviceNet Router to the DIN rail using PFP-M End Plates (not included
with the EtherNet/IP-DeviceNet Router) to prevent it falling off the DIN rail
because of vibration.
• Space must be provided around the EtherNet/IP-DeviceNet Router, at
least 5 mm from its side and at least 50 mm from its top and bottom surfaces, for ventilation and wiring.
■ Installation and Wiring
• Use the following to wire external I/O devices to the EtherNet/IPDeviceNet Router.
Solid wire
Stranded (flexible) wire
0.2 to 2.5 mm
0.34 to 1.5 mm2 (AWG 22 to AWG 16)
Stranded wires should be prepared by attaching insulated bar
terminals (DIN 46228-4 standard compatible) to the ends before
connecting them.
2
(AWG 24 to AWG 12)
• Disconnect the EtherNet/IP-DeviceNet Router from the power supply
before starting wiring.
• Properly apply the specified voltage to the EtherNet/IP-DeviceNet Router
inputs. Applying an inappropriate DC voltage or any AC voltage may interfere with functionality, may reduce safety, or may cause the EtherNet/IPDeviceNet Router to be damaged or burnt.
• Be sure to separate the communications cables and I/O cables from near
high-voltage/high-current lines.
• Be cautious not to get your fingers caught when attaching connectors to
the plugs on the EtherNet/IP-DeviceNet Router.
• Tighten the DeviceNet connector screws correctly (0.25 to 0.3 N·m).
• Incorrect wiring may lead to loss of safety functions. Wire conductors correctly and verify the operation of the EtherNet/IP-DeviceNet Router before
using the system in which the EtherNet/IP-DeviceNet Router is incorporated.
• After wiring is completed, be sure to remove label for wire clipping prevention on the EtherNet/IP-DeviceNet Router to enable heat to escape or
proper cooling.
■ Power Supply Selection
Use a DC power supply satisfying the following requirements.
xvii
Regulations and Standards4
• The secondary circuits of the DC power supply must be isolated from the
primary circuit by double insulation or reinforced insulation.
• The DC power supply must satisfy the requirements for class 2 circuits or
limited voltage/current circuits given in UL 508.
• The output hold time must be 20 ms or longer.
■ Periodic Inspections and Maintenance
• Disconnect the EtherNet/IP-DeviceNet Router from the power supply
before replacing the EtherNet/IP-DeviceNet Router. Devices connected to
the EtherNet/IP-DeviceNet Router may operate unexpectedly.
• Do not disassemble, repair, or modify the EtherNet/IP-DeviceNet Router.
Doing so may lead to loss of safety functions.
■ Disposal
• Be cautions not to injure yourself when dismantling the EtherNet/IPDeviceNet Router.
4Regulations and Standards
The EtherNet/IP-DeviceNet Router has been certified as follows:
Certifying organizationStandards
ULUL508, UL1604,
CSA22.2 No142, CSA22.2 No213
xviii
This section introduced the EtherNet/IP-DeviceNet Router and it’s functionality.
The NE1A-EDR01 EtherNet/IP-DeviceNet Router is an FA router with one
Ethernet port and one DeviceNet port, and is used for routing messages
between Ethernet and DeviceNet Networks. In this manual the NE1A-EDR01
EtherNet/IP-DeviceNet Router is called the “ED Router.”
1-1-1Accessing All Devices on a Network from a Network Configurator
Using an ED Router makes it possible to set devices, such as NE1A-series
Controllers and DST1-series Slaves, from a Network Configurator running on
a PC connected to an Ethernet or EtherNet/IP Network.
In addition, when multiple DeviceNet or DeviceNet Safety Networks are configured for an Ethernet or EtherNet/IP connection using an ED Router, it is
possible to set devices such as NE1A-series Controllers and DST1-series
Slaves connected to another DeviceNet or DeviceNet Safety network from a
Network Configurator running on a PC connected to a DeviceNet or NE1Aseries USB port.
Network
Configurator
Ethernet (EtherNet/IP)
ED Router
(NE1A-EDR01)
Network
USB
DeviceNet Safety
Configurator
DeviceNet Safety
DST1-series Slaves
NE1A Safety Network
Controller
DeviceNet Safety
DeviceNet Safety
DST1-series Slaves
Network
Configurato
Note(1) To access other networks, use the NE1A-SCPU01-V1 (unit version 2.0 or
later) or the NE1A-SCPU02 (unit version 2.0 or later) to connect the Network Configurator.
(2) To access other networks, use Network Configurator version 2.0@ or
higher.
2
EtherNet/IP-DeviceNet RouterSection 1-1
1-1-2Monitoring DeviceNet or DeviceNet Safety Systems via Ethernet
from Controllers Made by Other Manufacturers
Devices on a DeviceNet or DeviceNet Safety network can be accessed from
general-purpose controllers (e.g., PLCs or computers) in an Ethernet network
using the UDP service.
This enables monitoring a DeviceNet or DeviceNet Safety control system via
Ethernet from a machine controller or monitor computer that does not support
a DeviceNet interface. This can be used to easily add a DeviceNet Safety control system to an existing system.
Safety controls can be monitored by accessing
devices on the DeviceNet Safety network using the
UDP service from a general-purpose controller on
the Ethernet network (e.g., a PLC or computer).
PLC (OMRON or other maker)
OR
Computer
ED Router
(NE1A-EDR01)
Command via UDP
Ethernet
Command via UDP
DeviceNet Safety
Socket service (UDP)
DeviceNet Safety
DST1-series Slaves
NE1A Safety Network Controller
DeviceNet Safety
DeviceNet Safety
DST1-series Slaves
3
NomenclatureSection 1-2
1-2Nomenclature
The following illustration shows the part names of the ED Router.
Status indicators
DeviceNet node
address switches
DeviceNet
communications connector
Power supply connector
7-segment display
EtherNet/IP
IP address switches
Service switch
DeviceNet communications
baud rate switch
Ethernet connector
Ground connector
4
Installation and Network Connections
This section describes how to install and connect the networks.
Take the following into account during installation to improve the reliability of
the system and to fully utilize the system's capabilities.
Installation and
Storage Environment
Do not use or store the ED Router in the following locations.
• Locations subject to direct sunlight
• Locations subject to temperatures or humidity outside the ranges specified in the specifications
• Locations subject to condensation as the result of severe changes in temperature
• Locations subject to corrosive or flammable gases
• Locations subject to dust (especially iron dust) or salts
• Locations subject to water, oil, or chemicals
• Locations subject to shock or vibration
Take appropriate and sufficient measures when installing systems in the following locations. Inappropriate and insufficient measures may result in malfunction.
• Locations subject to static electricity or other forms of noise
• Locations subject to strong electromagnetic fields
• Locations subject to possible exposure to radioactivity
• Locations close to power supplies
2-1-2Mounting to the Control Panel
• Use the ED Router in an enclosure with IP54 degree of protection or
higher according to IEC/EN 60529.
• Use DIN Track (TH35-7.5/TH35-15 according to IEC 60715) to mount the
ED Router in the control panel. Mount the Router to the DIN Track using
PFP-M End Plates (not included with the ED Router) to prevent it from
falling off the DIN Track because of vibration.
• Provide sufficient space around the ED Router for ventilation and wiring,
at least 5 mm at the sides and at least 50 mm at the top and bottom.
• The ED Router can be mounted in any direction.
6
InstallationSection 2-1
k
s
Wiring duct
50 mm max.
NoteThe ED Router can be mounted only to a DIN Track. Do not screw the Router
DIN Track Mounting
Bracket Positions for the
ED Router
5 mm max.5 mm max.
End Plate Model: PFP-MEnd Plate Model: PFP-M
50 mm max.
Wiring duct
to the control panel.
35-mm DIN Trac
DIN Track Mounting Bracket
7
InstallationSection 2-1
2-1-3ED Router Dimensions and Weight
Dimensions
45.2
131.4
114.1
101.1
105.1
(Unit: mm)
Weight
ModelWeight
NE1A-EDR01220 g max.
8
WiringSection 2-2
2-2Wiring
2-2-1General Instructions on Wiring
Precaution:
• To prevent wire clippings from getting into the ED Router, do not remove
the label on the ED Router before wiring has been completed.
• After wiring has been completed, be sure to remove the label from the
Controller to enable heat dissipation for proper cooling.
• Disconnect the ED Router from the power supply before starting any wiring operations. Devices connected to the ED Router may operate unexpectedly if wiring is performed with the power supply connected.
• Be careful not to get your fingers caught when attaching connectors.
• Faulty wiring can result in a loss of safety functions. Be sure to perform
the wiring correctly, and check it before operation.
2-2-2Wiring the Power Supply
Wire SizesUse the following wires.
Solid wire
Stranded (flexible) wire
0.2 to 2.5 mm
0.34 to 1.5 mm
Stranded wires should be prepared by attaching ferrules with plastic
insulation collars (DIN 46228-4 standard compatible) before connecting them.
2
(AWG 24 to AWG 12)
2
(AWG 22 to AWG 16)
Recommended
Materials and Tools
Insulated Pin TerminalsUse a pin terminal with an insulated cover compliant with the DIN 46228-4
standard. Pin terminals similar in appearance but not compliant with the standard may not match the terminal block on the ED Router Controller. (The wiring dimensions are rough standards. Confirm the dimensions beforehand.)
Use wires of the same diameter if two-wire pin terminals are used.
Note(1) When wiring with pin terminals, be sure to insert pin terminals all the way
into the terminal block.
(2) When using two-wire pin terminals, use wires of the same diameter.
(3) When using two-wire pin terminals, insert the pin terminal so that metal
portion of the pin terminal is inserted straight into the terminal block, i.e.,
so that the long sides of the insulating cover are vertical.
Reference Specifications (Product Specifications for Phoenix Contact)
Model of pin terminalWire dimensions Pin terminal specifications
Cross-
sectional
area of
conductor
2
(mm
AI 0,34-8TQ0.34221012.580.82.0*1
AI 0,5-10WH0.5201016101.12.5
AI 0,75-10GY0.75181016101.32.8
AI 1-10RD1.0181016101.53.0
terminals
One-wire pin
AI 1,5-10BK1.5161018101.83.4
AWG Stripped
)
length of
insulation
(mm)
Overall
length L1
(mm)
Length of
metal
part L2
(mm)
Inner
diameter of
conductor
D1 (mm)
Inner
diameter of
insulative
cover D2
(mm)
Dimensions
9
WiringSection 2-2
Model of pin terminalWire dimensions Pin terminal specifications
Use a DC power supply satisfying the following requirements.
• The secondary circuits of the DC power supply must be isolated from the
primary circuit by double insulation or reinforced insulation.
• The DC power supply must satisfy the requirements for class 2 circuits or
limited voltage/current circuits defined in UL 508.
• The output hold time must be 20 ms or longer.
Ground WiringThe ED Router has a functional ground terminal. To prevent electric shock or
malfunctioning due to excessive noise, use an independent ground wire
(2 mm min.) with a maximum ground resistance of 100
ground wire should be no more than 20 m. To avoid grounding problems, do
not share the ground wiring with other devices or connect it to the building
structure. To further reduce noise, connect a noise filter.
Ω. The length of the
10
WiringSection 2-2
ED Router
Ground with max.
resistance of
100-Ω
Independent ground: Correct
Other devices
ED Router
Other devices
Shared ground: Incorrect
ED Router
Other devices
NoteGround correctly to avoid malfunctioning due to noise.
2-2-3DeviceNet Wiring
Wiring CablesWire the DeviceNet communications cable as shown in the following diagram.
IMPORTANT
Stickers are placed on the communication connectors based on the color of
each communications wire. By matching the communications wire colors with
the connector sticker colors, you can check to see if wires are in the correct
locations. The colors of the wires are as follows:
ColorDescription
RedV+
WhiteSignal (CAN H)
-Drain
BlueSignal (CAN L)
BlackV−
• Turn OFF the power supply to the NE1A-series Controller, to all nodes on
the network, and to communications lines before starting any wiring operations.
• Tighten the DeviceNet connector to the appropriate torque (0.25 to
0.3 N·m).
• Separate the DeviceNet communications cables from high-voltage/current
lines.
11
WiringSection 2-2
NoteRefer to the DeviceNet Operation Manual (W267) for further information on
wiring.
2-2-4Ethernet (EtherNet/IP) Network Installation
Basic Installation
Precautions
Recommended
Network Devices
PartMakerModel numberInquires
Switching Hub Cisco Systems, Inc.Consult the manufacturer. Cisco Systems, Inc. Main Corporate HQ
Contec USA, Inc.Consult the manufacturer. CONTEC USA Inc.
Phoenix ContactConsult the manufacturer. Phoenix Contact USA Customer Service
Tw is t e d- p ai r
cable
Connectors
(Modular plug)
BootsTsuko CompanyMK boot (IV) LVTsuko Company Japan Headquarters
100BASE-TX
FujikuraF-LINK-E 0.5mm × 4PFujikura America, Inc.
EtherNet/IP compliant cable---
STP Plug
Panduit CorporationMPS588Panduit Corporation US Headquarters
• Take the greatest care when installing the Ethernet System, being sure to
follow ISO 8802-3 specifications. You must obtain a copy of these specifications and be sure you understand them before attempting to install an
Ethernet System.
• Unless you are already experienced in installing communications systems, we strongly recommend that you employ a professional to install
your system.
• Do not install Ethernet equipment near sources of noise. If a noisy environment is unavoidable, take adequate measures against noise interference, such as installing network components in grounded metal cases or
using optical cable in the system.
The following table shows the devices recommended for use with the ED
Router.
Precautions
Precautions on Laying
Twisted-pair Cable
Note• Ask the switching hub manufacturer for setting procedures for the switch-
ing hub.
• Install the switching hub so that its environmental resistance capabilities
are not exceeded.
Ask the switching hub manufacturer for information on the environmental
resistance of the switch hub.
• Noise resistance may be reduced by ground loops, which can occur due
to improper shield connections and grounding. Ground the shield at one
location, as shown in the following diagram.
• Do not connect the shield to the ED Router connector.
• If a cable connects two hubs, connect the shields at only one end.
12
WiringSection 2-2
HubHub
Connector ConnectorConnector Connector Connector
GRGR
STP
(Shield)
Connect shield.
Do not connect shield.
STP
(Shield)
STP
(Shield)
ED Router
Connector
ED Router
Connector
FG
terminal
FG
terminal
• Press the cable connector in firmly until it locks into place at both the
switching hub and the ED Router.
• Do not lay the twisted-pair cable together with high-voltage lines.
• Do not lay the twisted-pair cable near devices that generate noise.
• Do not lay the twisted-pair cable in locations subject to high temperatures
or high humidity.
• Do not lay the twisted-pair cable in locations subject to excessive dirt and
dust or to oil mist or other contaminants.
• Do not ground the switching hub in the same location as a drive-system
component such as an inverter.
• Always use a dedicated power supply for the switching hub’s power supply. Do not use the same power supply used for other equipment, such as
an I/O power supply, motor power supply, or control power supply.
• Before installation, check the switching hub’s environment-resistance
specifications, and use a switching hub appropriate for the ambient conditions. Contact the switching hub manufacturer for details on switching
hub’s environment-resistance specifications.
• Connect two hubs to each other as follows: Connect an MDI port to an
MDI-X port with a straight cable; connect two MDI ports with a cross
cable; and connect two MDI-X ports with a cross cable.
Note It is very difficult to distinguish cross cables and straight cables by
appearance. Incorrect cables will cause communications to fail. We
recommend using cascade connections with straight cables whenever possible.
MDI-X port
(cross)
MDI ports
Switching
Hub
Switching
Hub
Switching
Hub
: Straight cable
: Cross cable
Switching
Hub
• Some switching hubs can automatically distinguish between MDI and
MDI-X. When this kind of switching hub is being used, straight cable can
be used between switching hubs.
13
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