Benefits of managed street lighting, Figure 2 – Echelon Lumewave CRD 3000 Street Light Bridge User Manual
Page 15
Street Light Bridge Integrator’s Guide
5
Figure 2. An Example Repeating Network
Each time that a message is repeated, on either channel type, is a repeater hop.
A message within a street lighting network must be able to reach its destination
in eight or fewer hops. That is, there can be no more than eight repeater hops on
the path (power line, RF, or both) between the Segment Controller and the
luminaire for which a message is destined. Figure 2 shows four hops between
the Segment Controller and Lamp 6.
From a L
ON
W
ORKS
network point of view, a CRD 3000 Street Light Bridge
module acts like any other power line device: It has a number of network
variables that are used to provision the CRD 3000 Street Light Bridge module
and collect status and statistics.
Installation of a CRD 3000 Street Light Bridge module is similar to installation
for any power line device. You must add it to the Segment Controller, either by
providing the Segment Controller with the Neuron
®
ID for the CRD 3000 Street
Light Bridge module, or by allowing the Segment Controller to automatically
discover and commission the CRD 3000 Street Light Bridge module. In either
case, power and RF communication LEDs on the CRD 3000 Street Light Bridge
module provide a visual cue to the installer that the CRD 3000 Street Light
Bridge module is operational. Additional configuration of the CRD 3000 Street
Light Bridge module is generally not necessary, but advanced configuration
options are available.
Benefits of Managed Street Lighting
A managed street lighting network can offer many benefits, including
•
Electricity use can be reduced – in one installation, by as much as 45%,
which in turn resulted in a 30% reduction in streetlight electricity costs
(USD 80 000 per year for this installation).
•
Reduction in carbon dioxide (CO
2
) emissions – in one installation, by 70
tons per year (corresponding to the 45% reduction in electricity use).
2
See Monitored Outdoor Lighting Market, Challenges, Solutions, and Next Steps, Echelon Corp,
September 2007