tion as well as providing energy usage information. The need for a common DC power
supply to power the sensors was seen as
a key piece to supply power to all types of
sensors within the luminaire. The result will
be a standardized way of using DALI for
communicating within a smart lighting pole
to include advanced control, sensing, monitoring and detailed asset management.
Ronald Tol, technical and certification
work group chair with DiiA, says, “The DiiA
is working with ANSI, Zhaga and the IEC to
enable DALI as an intra-luminaire communication bus for smart city applications. There
are multiple benefits when open standards
are used in these types of applications.
“The standardized DALI bus power sup-
ply and auxiliary power supply integrated
in a DALI-2 LED driver provide the required
power to a communication and/or sensor
node in a Zhaga or NEMA socket on a lumi-
naire," Tol adds. "This significantly simplifies
the installation for luminaire manufacturers
at a lower integral system cost. Furthermore,
luminaire asset data, energy data and diag-
nostics information in a standardized format
delivers on the promise of true interoper-
ability of communication and/or sensor
nodes, DALI-2 LED drivers and luminaires
implementing the standard.”
Other Future Uses
This new ANSI C137 standard for DALI
memory banks and auxiliary power supply
may also cross over to parking lot and interior lighting applications and help boost the
deployment of DALI networks in the U.S.
The interior space is currently weighing
the options of many different open wireless
digital control protocols, and proprietary
wired systems are still widely deployed
domestically. However, DALI is currently the
only wired digital system that’s a standardized open protocol specifically designed for
controlling general lighting.
Robert Hick of RH Controls Consulting LLC,
recently retired as vice president of engineering for Leviton’s Energy Management, Control
and Automation business unit after 18 years.
“DALI is a digital lighting protocol that supports bi-directional communications — something not supported by the previous 0-10 volt
control systems,” notes Kevin Fitzmaurice,
lead product engineer for Southern Company.
“DALI allows our LED luminaires to automatically commission themselves into our lighting
central management system without human
assistance via our wireless networked lighting control system. This is one of the many
advantages of using DALI instead of the 0-10
Reach in the U.S.
Fitzmaurice saw a need to standardize
this idea to make it easy for other organizations to implement, so he approached the
recently formed U.S. standards committee
for lighting systems, ANSI C137, to see if this
was a project of interest. C137 started work
on the standard with cooperation from the
DiiA and the IEC DALI standards committee.
The C137 committee is now working on
standardizing memory bank locations within
a DALI driver to store the needed informa-
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