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AUTOMATION

Having such seamless control will we can see 10BASE-T1L giving seamless IP all the way to the edge, working side by side
result in lower cost of ownership as with RS-485 and software configurable IOs for legacy architectures.
the networking is simplified, the data While the standard provides guidelines to ensure meeting the one km
can be easily aggregated distance, there are no restrictions on using other cables, on the
and interpreted, and understanding that the full distance may not be reached. Shielded
installation and 10BASE-T1L and non-shielded cables are allowed, which means retrofitting is
maintenance are was ratified by the IEEE possible in most cases. It would be advantageous to identify
also simplified. in 2019 as 802.3cg. exactly where there was an issue in one km of cabling. Any
We can now BMS system operator fully understands the effort involved
add intelligence The key elements of this in installing, commissioning and maintaining a system with
where there standard are providing power and kms of cables. Luckily, this is possible with 10BASE-T1L as
may have data over a single twisted pair it enables compliance and link quality testing as well as the
been simple ability to perform tests for the installation and maintenance
analog sensing with a data rate of 10 Mbps of the cabling.
in the past. By with the reach being
digitalising the edge Conclusion
and generating more one km. The need to turn buildings intelligent is important, to cut down
intelligent data, we can on excess carbon emissions as global warming has already led to
digitalise the entire building. the extinction of multiple species on our planet. If we are not careful, we
10BASE-T1L was ratified by the IEEE could be next. Intelligent BMS provides the data needed to make decisions around
7
in 2019 as 802.3cg. Analog Devices is sustainability and efficiency, communication, building control and automation, worker
a member of this committee and was health and safety and security. This in turn improves the levels of health and safety,
influential in driving this standard. sustainability, resilience and economics of the buildings market. n
The key elements of this standard are
providing power and data over a single For more information on the topic of intelligent buildings, please visit analog.com and
cable with a data rate of 10 Mbps – the get in touch with their Intelligent Buildings and Infrastructure team.
cable in this case being a single twisted
pair with the reach being 1 km. It’s References
important to note that for retrofitting 1. Juan Palacios, Piet Eichholtz, and Nils Kok. “Moving to Productivity: The Benefits of
within a building, the existing twisted Healthy Buildings.” PLoS ONE, Vol. 15, No. 8, August 2020.
pair cabling can be used. 2. “68% of the World Population Projected to Live in Urban Areas by 2050, Says UN.”
When this is compared to some UN Department of Economic and Social Affairs, May 2018.
of the existing infrastructure such 3. Edward L. Glaeser and Matthew E. Kahn. “The Greenness of Cities: Carbon Dioxide
as RS-485, we can see some valid Emissions and Urban Development.” National Bureau of Economic Research, August
improvements. The data rate is constant 2008.
over one km, and is not dependent on 4. “Energy Use Overview.” Sustainable Energy Authority of Ireland, 2020.
the distance as per RS-485. Moreover, 5. “Questions and Answers on the Renovation Wave.” European Commission, October
the number of nodes is unlimited with 2020.
10BASE-T1L for data, whereas it’s limited 6. Natasha Sadikin, Irmak Turan, and Andrea Chegut. “The Financial Impact of Healthy
to 256 for RS-485. One key advantage is Buildings: Rental Prices and Market Dynamics in Commercial Office.” MIT Center for
the provision of power over the same Real Estate, February 2021.
single twisted pair up to 52 W – in a 7. “Global Warming and Endangered Species Initiative.” Centre for Biological Diversity.
similar way to POE, whereas it’s limited
to what we called engineered power
with RS-485. *About the author
However, it is well understood Barry Mulligan is a marketing manager for the Intelligent Buildings and
that RS-485 still has a valid position Infrastructure Group at Analog Devices Limerick, primarily focusing on expanding
in building automation for particular ADIs influence in the Intelligent Building market. He has worked at ADI since 2016.
use cases. We also understand that His previous engineering roles include transceiver applications engineer for 5G base
stations and supply chain planner for the RF product range at ADI. He also worked as
buildings will not perform the full digital a mechanical, electrical and plumbing engineer for design consultants Arup before
transformation overnight, so 10BASE- joining ADI and spent a year working in Minnesota for Windlogics, a wind energy
T1L needs to work alongside existing consultancy firm. He can be reached at barry.mulligan@analog.com.
systems for the foreseeable future. Here

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