Industrial Field-Bus Standards Update(Physical Layer)
Bob Lounsbury
Principal Engineer
Rockwell Automation
Presented at the ODVA2014 Industry Conference & 16th Annual Meeting
March 11-13, 2014
Phoenix, Arizona, USA
Abstract:
Standardization of cabling systems for communications networks has been ongoing since the early 90s. Since theinitial standardization of industrial cabling systems for ODVA there have been many new high performancecomponents and enhancements added. The standards organizations continue to work to provide standardization ofthese new components and systems. There are several national and international cabling standards that have a
direct impact on networks throughout the world. These standards are either based on ODVA network standards
and/or are the foundation for the ODVA networks.
This paper will focus on the current state of these standards and bring the audience up to date on how they affectODVA. In addition some of these standards organizations are working on new physical layers that when ready may
offer a great benefit to ODVA and its networks. For example IEEE 802.3 is working on a completely new 1Gb/s
network the will offer a great benefit in the total cost of ownership for ODVA customers.

Keywords:
ISO/IEC, IEC, EtherNet/IP™
Body:
Open standards are important for the promotion and adoption of networks and technology. The task ofStandardizing of EtherNetTM in the industrial area has become a major activity within the national and international
community. This paper will discuss the current state of the national and international standards with respect to
ODVA physical layers including cabling and components.
ODVA has been a leader in the publishing of industrial Ethernet standards and planning and installation guides.
Since the release of EtherNet/IPTM, v1.0 in 2001 many national and international standards organizations have either
released or are about to release standards for industrial Ethernet. Figure 1 shows the relationship of these standards.
Figure 1 is arranged from coverage area through the Planning and installation phase with regards to the standards
activities. What the reader should note with the arrows is that all the national and international standards
committees are working together and exchanging information to create multiple standards at each geographical area.
A lot of this work is harmonized through the efforts of ODVA members who work with the standards committees.

Figure 1 Cabling Standards

Areas of Coverage

Network Design

Planning and Installation

IEEE 802.3

OfficePremises

Generic
Cabling

ISO/IEC 11801
ISO/IEC
14763-2

Between and in
Automation
Islands

ISO/IEC 24702

IEC 61918(common requirements)

Industrial Premises
Automation
Specific Cabling
Between and in
Automation
Islands

IEC 61158
Series and IEC
61784-1,2

IEC 61784-5-X
Installation profiles(Selections + Add /Replace /Modifications)

TIA 568
seriesTIA 1005

EtherNet/IPTM

ODVA

DeviceNetTM, EtherNet/IPTM
and ControlNetTM

At the 2007 CIP Networks Conference & 12th Annual Meeting I reported on the state of the standards. Since thisreport there have been many updates and additions to the standards. For example at that time the Generic standards
were focusing on cabling for 10G. Today they are focusing on cabling for 40G and 100G with some discussions of
400G. It is this expansion that drives the technology within the ODVA Physical Layer SIGS. For industrial control
including CIP motion we are moving from the 10/100 Mb/s data rates into the 1Gb/s data rates. The release of
Category 6A has helped this migration in providing balance cabling technology driven by TCL and ELTCTL values
documented in the national and international standards through MICE.
The industrial networking technology continues to evolve at a rapid pace, primarily in the CSMA networks such as
Ethernet which is the foundation of EtherNet/IPTM. There are several important standards activities at both thenational and international level that have a direct impact on ODVA EtherNet/IPTM physical layer designs andcommunications cabling.

ISO/IEC 11801 and TIA 568 series standards were written several years ago to support Generic
Telecommunications communications systems for commercial buildings. ISO/IEC 11801 is once again undermajor revision. The standard will soon be released as a comprehensive set of standards similar to what TIA had
done with the TIA 568 Series of standards, now at Series C. ISO/IEC will have 6 parts when complete. The 6 parts
will consist of;• Commercial,• Generic,• Residential,• Industrial,• Data Centers,• Command Control Communications for Buildings (CCCB).
For the industrial community the inclusion of ISO/IEC 24702 (Industrial) in to ISO/IEC 11801 is beneficial, since
they very much related and now can share technology and resources. For example the MICE concept and its
driving technology will now become all-encompassing with respect to all 6 parts of the ISO/IEC 11801 standard.
Our national standard written and maintained by ANSI TIA TR42 committee, ANSI TIA-568 series will soon bereleased as Series D. Industrial will continue to be a separate standard ANSI TIA-1005A. The following Table 1
provides the current revision level of the relevant standards and their last release date.
Table 1 Current Revision of Cabling Standards

Standard

Name

TIA 568-C
seriesTIA 1005A
TIA-607-B-1

Commercial Building Telecommunications CablingStandard (Generic Cabling)
Industrial Telecommunications Cabling Standard
Generic Telecommunications Grounding (Earthing)and Bonding for Customer Premises
Information Technology Generic cabling forcustomer premises
Information Technology Generic cabling Industrial premises
Installation for Information Technology

Various

Industrial Communications Networks – Installationof communications networks in industrial premises
Industrial Communications Network-Profiles Part52: Installation of fieldbuses-installation profiles for
CPF-2

ISO/IEC 11801
ISO/IEC 24702
ISO/IEC14763n
IEC 61918
IEC 61784-5-n

Revision Level

Release Date
2012
2010

Addendum 1
2.2

2011

Ed1+ amendment 1

2009

Ed1

2012

Ed3

2013 Stable 2018

Ed3

2013 Stable 2018

Major Projects Within The Standards Committees
As mentioned earlier in this paper, industrial networking technology continues to evolve at a rapid pace. Table 2
shows the active projects with in the standards community that are of interest to the ODVA community. Thebalance of this paper will discuss each one of these projects and the potential impact and or benefits to the ODVA
networks.

Table 2 Active Standards Projects

Project
Combine Commercial, Residential,
Generic, Industrial and Data Centers
into one Standard ISO/IEC11801-1-5
Command Control Communications
for Buildings (CCCB) to be become
ISO/IEC 11801-6
Move Series of standards to D

Sponsor Standards Group
Consortia

Assigned Standards Group

ISO/IEC/JTC1/SC25/WG3Same (NWIP)

ISO/IEC/JTC1/SC25/WG3

ISO/IEC/JTC1/SC25/WG3 (NWIP)ANSIANSI TIA TR42

Grounding ((Earthing)) and Bonding
Industrial
1 Gig Cabling (4 Pair) for Industrial

ODVA, Industrial Consortia

M12-8 X coded Connector
Reduced Twisted Pair Gigabit Ethernet
End to End LinkODVA and IEC/SC65C/JWG10Automotive and Industrial
IEC/SC65C/JWG10

Mixed Cabling

Siemens and IEC/SC65C/JWG10

Industrial consortia

ODVA, TIA-TR42.9 andISO/IEC/JTC1/SC25/WG3ODVA, TIA-TR42.9
SC48B, TIA-TR42.9
IEEE 802.3 bp
ISO/IEC/JTC1/SC25/WG3 (NWIP)
Also includes JMTG
IEC/SC65C/JWG10As mentioned earlier in this paper ISO/IEC/JTC1/SC25/WG3 has a New Work Item Proposal (NWIP) to combine
several standards into the ISO/IEC 11801 standard. The ISO/IEC 11801 standard is a parallel standard at theinternational level to ANSI TIA-568-C series standards. The important change in this standard is the inclusion of
the industrial standard ISO/IEC24702 into the ISO 11801 structure. This will be done as Part 3 of the standard.
This provides a greater sharing of the technology and concepts between the two standards. In addition CCCB will
be added to ISO11801 under another NWIP. CCCB has a lot of commonality to that of the industrial networks sincethese standard addresses building control needs such as Heating Ventilation Air Conditioning/ HVAC.
TIA’s current focus is to revise the standards to Series D. There is little or no impact to Industrial since combining
TIA 1005A is not part of this effort. However this effort is consuming a lot of the committee’s resources. The
generic cabling subcommittee TR 42.7 is working on the next generation cabling 40G with IEEE 802.3 whilefinishing up test schedules for 10G cabling.
All three committees (ISO/IEC/JTC1/SC25/WG3, ANSI TIA TR42 and ODVA are working on the initial release orrevision of a Grounding (Earthing) and Bonding standard. ODVA will have its own Grounding (Earthing) andBonding standard that is focused on ODVA networks. This standard will take information from both the ISO andANSI TIA versions. Due to the lack of industrial focus and detail in the two national and international standards it’s
not possible to just point our ODVA community to these standards. The ODVA Ground (Earthing) and Bonding
standard is due out this calendar year as a Technical Bulletin.
One of the most exciting and technical additions to the Industrial standards is 1Gig cabling. Both ODVA and ANSITIA TR42.9 are working on a new class of cabling to support industrial 1G channels. This class of cables will havespecific attributes aimed at reducing the effects of noise on 1G control channels. These new channels require 4 paircables. Since they require a 4 pairs to be present in the cable we no longer would have had a sealed small form
factor connector like the M12-4 D code connector. Therefore ODVA has adopted a M12-8 X code connector into
the standard as of 2013. This new connector supports data rates up to 10G. This work is expected to be completed
this calendar year (2014).
With the rapid expansion of CSMA networks, the automotive manufactures are moving to Ethernet based
communications networks for Automobiles. There is a project in IEEE 802.3 to create a new copper network for in
car use. This network is expected to be deployed in some European cars by 2018. This network is called Reduced
Twisted Pair Gigabit Ethernet (RTPGE). The length of a channel is approximately 15 meters (that of a USB)channel. The project includes noise studies which is new for IEEE 802.3. The end solution will be a new class of
PHYs most likely only supporting RTPGE channels consisting of 1 twisted pair. One of the challenges is S/N in the
car with inexpensive cabling components. This is the reason for the short channel. Like CAN bus networks ofwhich DeviceNet™ is based on, there is a lot in common with industrial environments and automotive
environments. In addition with the reduction of cable elements and simplification of the connectors has a lot of
benefit for industrial. The industrial Ethernet consortia’s are interested in this new channel. One of the major
hurtles to overcome is the short 15 meter channel length. While the majority EtherNet/IPTM channels are less than 5
meters this restriction still hinders a wide deployment of such a channel. It is expected with optimized cabling
designs the channel can be extended to approximately 40 meters. This covers more than 80% of the channels foundin industrial control applications. One other obstacle in the adoption of this new PMD, is that the new PHY is
expected to only support a 1G RTPGE channel. This means that vendors will have to provide a unique set of
products just supporting this channel. It is expected that this new PMD will be release from IEEE 802.3 in early2015 with PHYs following.

Another project of importance to Industrial is the End to End link (E2E). This project addresses the way our cables
are deployed in the industrial installations. Most of our channels are links that consist of two plugs and a long cable,i.e., a long patch cord. Cords that are longer than 20 meters are outside the Generic standards. Currently therequirements for testing cords is a sub set of the performance measurements of a channel and only includes Returnloss and Insertion loss. Channel tests do not include the plugs at the two ends of the channel. Since most of ourchannels (links) are constructed in place, there is a higher probability that the installer has compromised the channel
performance at the back end of the two end connectors. Wire preparation is extremely important during theconnectorization of Ethernet cables. Since the two plugs are outside the testing scope of a channel these issues cango un-verified and cause problems that are difficult to find. This project address this by creating a new channel(link) that has a complete set of transmission parameters that include both plugs at the two ends of the channel thus
End to End Link. This essentially is a new channel for the industry. It is expected that this work will be completed
by early 2015. Most of the work is being done in the Joint Modeling Task Group (JMTG) reporting into
ISO/IEC/JTC1/SC25/WG3. This project was requested from IEC/SC65C/JWG10 (Joint Working Group for Field
Bus Installation)

Mixed cabling is a project that is being worked on in IEC/SC65C/JWG10. This project will, if successful allow themixing of 2 pair and 4 pair cables in a single channel. It most likely will be limited to shielded cables only. This
project is expected to solve the problems where customers have installed 4 pair horizontal cables and has a need toconnect to 10/100 mb/s PMDs with 2 pair cords. Doing so will cause two of the four pairs to float without aconnection or termination. Normally this is not a good practice since the high impedance of the un-terminated pairs
can cause degraded performance in the active two pairs. Individually shielding the pairs in the horizontal segmentof the channel will reduce the interaction of the pairs with one another (cross talk). This project is expected tocomplete in 2014.

**************************************************************************************The ideas, opinions, and recommendations expressed herein are intended to describe concepts of the author(s) for the possible use of CIP
Networks and do not reflect the ideas, opinions, and recommendation of ODVA per se. Because CIP Networks may be applied in many diverse
situations and in conjunction with products and systems from multiple vendors, the reader and those responsible for specifying CIP
Networks must determine for themselves the suitability and the suitability of ideas, opinions, and recommendations expressed herein for intended
use. Copyright ©2014 ODVA, Inc. All rights reserved. For permission to reproduce excerpts of this material, with appropriate attribution to theauthor(s), please contact ODVA on: TEL +1 734-975-8840 FAX +1 734-922-0027 EMAIL odva@odva.org WEB www.odva.org.
CIP, Common Industrial Protocol, CIP Energy, CIP Motion, CIP Safety, CIP Sync, CompoNet, ControlNet, DeviceNet, and EtherNet/IP aretrademarks of ODVA, Inc. All other trademarks are property of their respective owners.