Echelon Lumewave CRD 3000 Street Light Bridge - Manual (Page 14)

4 Introduction
Street Lighting Network, on page 77, for more information about the Segment
Controller. See the i.LON SmartServer User's Guide for more information about
the SmartServer.
Luminaires and Street Light Controllers
Each street light in an intelligent street light network must be able to
communicate over a L ON W ORKS power line communications channel. Thus, each
luminaire must include a L ON W ORKS power line communications chip (such as
an Echelon Power Line Smart Transceiver). If the luminaire does not already
include power line communications, you can add a street light controller 1 to
either the luminaire or to the street light pole to provide power line
communications.
A luminaire in a street lighting network remains on until it is commissioned by
the Segment Controller. After it is commissioned, the luminaire turns on or off
based on the schedule defined for it by the Segment Controller.
CRD 3000 Street Light Bridge Modules
A CRD 3000 Street Light Bridge module is a power line channel device that
extends the communications range of the Segment Controller. A CRD 3000
Street Light Bridge module uses the Institute of Electrical and Electronics
Engineers (IEEE) wireless personal area network standard 802.15.4 for radio
frequency (RF) communications to allow it to bypass service distribution
transformers and extend the street lighting network.
The primary function of a CRD 3000 Street Light Bridge module is to act as a
repeater for the street lighting network. A CRD 3000 Street Light Bridge module
can repeat network packets on the power line channel, an RF channel, or both.
The Segment Controller determines both the route and channel type that the
CRD 3000 Street Light Bridge module should use for repeating.
Figure 2 on page 5 shows a simple repeating chain that could be used to relay a
network management command from the Segment Controller to a target device
(a luminaire in this case, but it could be a CRD 3000 Street Light Bridge module).
In this example:
• Lamp 1 and Lamp 2 have direct power line communications with the
Segment Controller
• Lamp 2 and Lamp 3 use SLB 1 and SLB 2 for RF communications
• Lamp 3 and Lamp 4 use power line communications
• Lamp 5 is a power line repeater (a repeating-enabled luminaire), and so
forwards messages from the Segment Controller to Lamp 6, and from
Lamp 6 to the Segment Controller
• Lamp 6 is at the end of the repeating chain
1 Street light controllers that provide power line communications are available from companies such
as Citylone, Koninklijke Philips ® Electronics.N.V., Luminext BV, ROMlight™ International Inc,
SCS StreetLight Control Solutions, S.L., Siteco Beleuchtungstechnik GmbH, and Superior
Electronic Lighting Controllers (SELC Ireland Limited).