Industrial Ethernet Layer 2 Managed Switch User Manual
Document Control
Date Author Version Description
July 1, 2006 KC Chen 1.0 First draft
Dec 2, 2010 Jerry Chiu 1.1 Add DI/O Wire Connection
Jan 1, 2011 Jerry Chiu 1.2 Modify jumper block label
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Industrial Ethernet Layer 2 Managed Switch User Manual
Copyright & Trademarks
All rights re served. No par t of this publ ication may be
reproduced, s tored in a ret rieval system, or
transmitted i n any form or by any means, whether
electronic, m echanical, pho to copying, re cording or
otherwise, wi thout the prio r written perm ission of the
publisher.
The names use d for identifi cation only ma y be
registered tr ademarks of th eir respective companies.
Industrial Ethernet Layer 2 Managed Switch User Manual
Disclaimer
Limited Warranty
All products manufactured b y ICP DAS are warranted
against defec tive materials for a period of one year
from the date of delivery t o the original purchaser.
During this p eriod, if a cu stomer is unab le to resolve
a product pro blem with ICP DAS Technical Support, a
Return Materi al Authorizati on (RMA) will be issued. If
the product i s not under wa rranty, the cu stomer may
have ICP DAS repair the uni t on a fee bas is or return
it.
This warranty is voided if the customer u ses the
product in an unauthorized or improper wa y, or in an
environment f or which it wa s not designed .
Standards
Warning
The Ring Swit ch meets the f ollowing stand ards:
EMC immunity - IEC61326-1, IEEE C37.90
EMI emissions - FCC part 15 , ICES 003, EN 55022;
Class B
Electrical sa fety - UL 508, CSA C22/14; EN610 10-1
(IEC1010)
ICP DAS assum e no liability for damages c onsequent to
the use of th is product. IC P DAS reserves the right to
change this m anual at any t ime without no tice. The
information f urnished by IC P DAS is belie ved to be
accurate and reliable. Howe ver, no respon sibility is
assumed by IC P DAS for its use, nor for a ny
infringements of patents or other rights of third
parties resul ting from its use.
Safety
Install the Real Time Ring Switch in accordance with
local and national electrical codes.
Lightning Danger: Do not work on equipment during
periods of lightning activity.
Do not connect a telephone line into one of the
Ethernet RJ45 connectors.
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Industrial Ethernet Layer 2 Managed Switch User Manual
Preface
The advent of Ethernet brings the whole world a new territory. So it does in industrial
application. More and more industrial devices and equipment now support Ethernet. To
make all these devices and equipment integrated and worked, the Ethernet switch is a
key character.
For commercial using, the Ethernet switch is very easy to choose, and also cheap. But,
in industrial field application, user must take the environment conditions and field
requirement into concern.
Harsh environ, such as extreme high or low temperature, moisture, ground
differentials and electrical noise … etc
Requirement of fault-tolerant solution.
For automation and control engineers who have been forced into this IT domain,
they really don't want to get too involved with the idiosyncrasies and maintenance
of Ethernet networks.
To satisfy these, the Managed Switch provides you a rugged, fault-tolerant, plug and
play solution.
ICP DAS industrial Switch Series
ICP DAS industrial Ethernet switch has the following series:
NS Series: Network Switch Series, a standard switch with industrial class of
quality.
RS Series: Ring Switch Series, a redundant ring switch with industrial class of
quality.
Managed Series: A redundant ring switch with industrial class of quality, and
provides lots of powerful managed functions.
How to Use this manual
This manual is intended to help user quickly understanding and easily making use of
MSM-508 (and other supported products), and the arrangement of chapters and
sections follows the steps that user need to take.
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Industrial Ethernet Layer 2 Managed Switch User Manual
Industrial Ethernet Layer 2 Managed Switch User Manual
Acronyms
ATM Acronym for Asynchronous Transfer Mode, a high performance
networking technology based on the switching of fixed length, 53 byte
cells. ATM switching supports the switching of voice, video, and data;
also supports isochronous communication.
BPV Acronym for Bi-Polar Violation.
B-ISDN Broadband ISDN. A network standard from the CCITT and ANSI
committee. It supports voice, data and video in the same network.
CCITT Acronym for Consultative Committee, International Telephone and
Telegraph. An international standards body responsible for setting
international communications standards that allow interoperability
among telephony and data communications equipment.
CD (DCD) Acronym for Carrier Detect (Detect Carrier Detect).
CDDI The use of unshielded or shielded twisted pair cable to transmit the
FDDI signal.
CO Acronym for Central Office. The local telephone company switch that
terminates subscribers' lines for switching and connecting to the
public network.
CSMA/CD Acronym for Carrier Sense Multiple Access with Collision Detection.
Access protocol for Ethernet.
CSU Acronym for Channel Service Unit, a device furnished as an integral
part of a digital access line where a user wishes to supply the bipolar
signals. It provides the network with protection against user side
electrical anomalies such as surges, and provides the user with
network clocking.
CTS Acronym for Clear To Send.
DCE Acronym for Data Communication Equipment, aka. Data Circuit-
Terminating Equipment.
DCR Acronym for Data Communication Ready.
DS1 Digital Signal, Level 1 is the North American data rate used for T1
carriers. It operates at 1.544Mbps and supports 24 phone lines.
DS2 Digital Signal, Level 2 is the North American data rate used for T2
carriers. It operates at 6.312 Mbps and supports four T1 lines or 96
phone calls
DS3 Digital signal, Level 3 is the North American data rate used for T3
carriers. It operates at 44.736 Mbps and supports 28 T1 lines.
DSU Acronym for Data Service Unit, a DCE used with digital
communications circuits to provide digital data services interface.
Located on the users premises, the DSU interfaces directly with the
DTE, and provides loop equalization, remote and local test
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Industrial Ethernet Layer 2 Managed Switch User Manual
capabilities, and the logic and timing necessary to provide a standard
EIA/TIA or CCITT interface. Converts signals between those used at
the DTE's serial interface and bipolar signals used on the digital
network. Also Network Terminal Unit (NTU).
DTE Acronym for Data Terminating or Data Terminal Equipment.
DTR Acronym for Data Terminal Ready.
E1 The European standard for high speed, point to point transmission
operating at 2.048 Mbps and defines 64 Kbps sub-channels.
EIA Acronym for Electronic Industries Association. EIA, a standards body,
has a set of standards which includes data communications and
interface standards among others.
EMI Acronym for Electro-Magnetic Interference.
FEP Stands for Front End Processor. It is an IBM communication controller
that routes traffic to and from cluster controllers.
FDDI Acronym for Fiber Distributed Data Interface, is a shared medium, ring
topology LAN that operates at 100 Mbps. It is ANSI standard X3T9.5,
using fiber optic cable as the medium.
FPGA Acronym for Field Programmable Gate Array.
LAN A local area network is a group of PCs connected over a common
medium within a building.
MAC Acronym for Medium Access Control. A designated hardware address
for each device on a LAN or MAN. This address is burnt into The
network interface card (NIC) by its manufacturer.
MAN A metropolitan area network is a group of PCs connected over a
common medium within a campus environment or the same city.
NA Acronym for Numerical Aperture.
OC1 Optical Carrier Signal Level 1 refers to SONET data transmission at
51.840Mbps.
OC3 Acronym for Optical Carrier 3, a transmission rate standard for fiber
optic telephony or data communications circuits. OC3 operates at 155
Mbps speed and is part of the SONET hierarchy.
OC12 Optical Carrier Signal Level 12 refers to SONET data transmission at
622.080Mbps.
OSI (Open Data Interconnection Reference Model) - This is the
International Standards Organization (ISO) model of how data
communications systems can be interconnected. Communication is
partitioned into seven function layers. Each layer builds on the
services provided by those under it.
PBX Acronym for Private Branch Exchange, is a small private version of a
phone company's larger central switching office.
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Industrial Ethernet Layer 2 Managed Switch User Manual
PCM Acronym for Pulse-Coded Modulation, a means of converting analog
to digital form.
RING Path or channel; usually electrical, where devices along the path
receive transmissions sequentially from one device to the next along
the ring.
RS-232 An interface used between DTE and DCE employing serial binary
data interchange, defined by EIA, aka. EIA-232. Similar to standard
V.24 of CCITT.
RS-422 Standard defined by EIA, aka. EIA-422. Deals with the electrical
characteristics of balanced voltage digital interface circuits. Similar to
standard V.11 of CCITT.
RS-423 Standard defined by EIA, aka. EIA 423. Deals with electrical
characteristics of unbalanced voltage digital interface circuits. Similar
to standard V.10 of CCITT.
RS-449 Standard defined by EIA, aka. EIA-449. Deals with general-purpose
37- and 9-position interface for data terminal equipment and data
circuit-terminating equipment employing serial binary data
interchange.
RS-485 Standard defined by EIA, aka. EIA-485. Standard for electrical
characteristics of generators and receivers for use in balanced
multipoint systems.
RTS Acronym for Request To Send.
SCADA Acronym for Supervisory Control and Data Acquisition.
SNMP Acronym for Simple Network Management Protocol. A standard
management protocol used to provide a common means of managing
network devices.
SONET Acronym for Synchronous Optical NETwork, is a hierarchical standard
for a high speed (45 Mbps to 2.4 Gbps) transport network.
T1 Transmission rate standard for telephony or data communications
circuits. T1 operates at 1.544 Mbps speed. Usually this circuit is
subdivided into many 64 Kb channels.
TCP/IP Acronym for Transmission Control Protocol/Internet Protocol.
WAN Acronym for Wide Area Network, a computer network interconnected
over distances beyond a city or metropolitan area.
802.3 Commonly referred to as Ethernet. It is a local area network protocol
that operates at 10Mbps.
802.5 Commonly referred to as Token Ring. Operates at either 4 or 16Mbps.
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Industrial Ethernet Layer 2 Managed Switch User Manual
Introduction
Welcome to ICP DAS Managed Industrial Ethernet Switch one of
the world’s best Industrial Ethernet Switch designed for connecting
Ethernet-enabled devices in industrial field applications. This manual
is for the ICP DAS Managed Switch.
Overview
The Managed Industrial Ethernet Switch is designed upon concepts
of reliability, quick recovery, easy configuration, self-healing and
SCADA for status monitoring. Besides, all models in Managed Switch
mechanism is also designed to meet IP301 above for working under
harsh environment.
Unlike other existing ring switch or managed Ethernet switch on the
market, the ICPDAS Managed Switch is much more easy to use and
absolutely free of software setting.
1
Ingress Protection, see “Appendix B” for detail information.
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Industrial Ethernet Layer 2 Managed Switch User Manual
Ethernet Switch
Ethernet is an ideal medium to transport large volumes of data, at speed, across great
distances. Previously, multiple networks carrying specific protocols were installed side by
side to carry out unique tasks. This inevitably led to project costs increasing as additional
fiber optic or copper cables were installed to deal with the increasing volume of data.
Using Ethernet a single fiber optic cable can carry multiple protocols. Furthermore,
manufacturers are exporting their legacy protocols onto Ethernet, designing new IP
based communication protocols and providing embedded Web-Pages within devices that
offer real-time information using simple tools like Internet Explorer and Netscape
Navigator.
Unfortunately, although network hardware has dramatically increased in speed and
technology over the past decade the poor perception of Ethernet has remained; namely
as being difficult to fault-find and critically being a non-deterministic network. A key
development that overcame some of these issues was the advent of the Ethernet Switch.
Early Ethernet networks were based on a hub or repeater. These units have no
intelligence and therefore are unable to identify any information contained within the
Header frame of an Ethernet packet. This means that it is not capable of determining
which port to send the frame to. Therefore, every frame is sent to every port. A network of
repeaters and hubs is called a ‘Shared Ethernet’ or ‘Collision Domain’. Various devices
will all compete with each other before sending data using ‘Carrier Sense Multiple Access
/ Collision Detect’ (CSMA/CD) protocol. This means that only one system is allowed to
proceed with a transmission of a frame within a Collision Domain at any one time. This is
a major disadvantage when using Hubs and Repeaters within a network.
A switch, like a hub, has to forward and receive packets from one network or device to
another. The switch could forward all packets, but if this was the case it would have
similar behaviour to a hub. It would be more intelligent if the switch only forwarded
packets which needed to travel from one network or device to another. To do this, the
switch must learn which devices or networks are connected to each port. In simplistic
terms; it needs to learn the destination and source ports of each and every packet
received on each individual Switch port. Once learnt, any identically addressed packet
will be automatically be forwarded. With today’s enhanced processing power the
introduction of a Switch has significantly increase network bandwidth.
Industrial Ethernet
Industrial rated Switches are intended to be installed in both harsh climatic environments
and noisy electrical installations. Such Switches are an excellent example of true
industrial design principles –
very high operating temperatures (down to -30°C an d up to 75°C)
dual input power supplies
wide DC operating voltages
In Roadside and tunnel applications distances between cabinets with a suitable power
supply can be challenging. Naturally, fiber optic cable is the preferred solution. Using
single mode fiber, runs of up to 85km are possible. Even using standard CAT5e copper
cable the Industrial Switch supports the long cable specification and distances of up to
185m are viable. However, the domain of Ethernet has always been controlled by the IT
department who normally configured office networks with an iron fist and dictated to the
organisation how the network would be designed. Complex network recovery protocols
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Industrial Ethernet Layer 2 Managed Switch User Manual
like spanning tree, and SNMP to help with fault finding and system analysis were often
employed to enhance network resilience. If a network failure occurred the IT department
would casually look at repairing the equipment; there was no real rush as it was an office
network.
However, with industrial Ethernet you need very fast repair time and with an IT
department not readily available on the roadside, maintenance personnel need to be
made aware of the fault, find the error and repair it - quickly. To aid this, unique network
recovery features are employed to significantly enhance network recovery times. When
an IT department requires a level of redundancy a common method is to employ the
spanning tree protocol. However, spanning tree can be complex to program and
critically can take over 30 seconds to detect and recover from the fault – far to long for
critical applications!
ICP DAS Managed Switch incorporates propriety protocols that enable multiple Switches
to be placed into a redundant ring. A single Switch, configured as the network focal point
will monitor, detect and recover from a fiber or copper link failure within approximately
50mS – for the majority of applications a seamless process. The configuration process
of the network focal point is simple as it must be remembered that as the switches are to
be installed on the roadside the first to be called to rectify a fault will more than likely be
Maintenance personnel.
Module
Feature
Communication Protocol
Managed Interface
Service
Redundancy
Amount of Rings
Single Coupling
Redundant Coupling
Router/IP sharing
IEEE standards
Alarm
Convenience
ICPDAS Managed Switch General Managed Switch
Modbus/TCP
Modbus/RTU
Serial Console,
Utility
Web
telnet
OoS, HTTP, VLAN, SMTP. QoS, CoS, VPN, FTP, HTTP,
Cyber-Ring
(Variable recovery time from 100
ms to 1.5s)
Spanning Tree.
2 1
Yes No
Yes No
No Yes
802.3
802.3x
802.3u
802.1D
802.1p
802.1q
Relay Output
Modbus
Easy to use/configure N/A
SNMP
IGMP
Serial Console
Utility
Web
telnet
HTTPS, SSH, VLAN
Trunking, Spanning Tree, Rapid
Spanning Tree
802.3
802.3x
802.3u
802.1D/w
802.1p
802.1q
SNMP
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