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SPECTRA TUNE HCL
Human Centric Lighting for Researchers
21
APPENDIX 3: Communications components
LIGHT HUB
The LIGHT HUB is the device responsible to manage and control the communications from
and towards a single downlight or a grouped of downlights. The communication bus is an
EIA-485 (also known as RS-485) allowing for high speed signals over long distances in serial
connections.
The LIGHT HUB is designed for indoor applications only (IP20).
The LIGHT HUB can be accessed remotely connecting the device to the local network (LAN)
using an ethernet cable or it can also be accessed locally using a mini-USB to USB cable
directly connected to a PC or laptop (first a network over the USB must be created between
the PC and the LIGHT HUB).
To provide the user with full programing flexibility, an optional RESTful API is available.
Please contact LEDMOTIVE to ask for the documentation if you have purchased this item.
Please refer to the LIGHT HUB datasheet to find more information about this device.
COMMUNICATION WIRES
To build the communication bus, a shielded twisted pair of wires should be used. It is
recommended to use any range of wires between AWG-24 to AWG-18 with a characteristic
impedance
of 120 Ω. Ideally the wires should be of different colors to avoid confusion when
connecting all luminaires to the bus. We strongly recommend suiting the following
regulations in the wire selection:
•
UNE-EN 50267-2-1 / IEC 60754-1
•
UNE-EN 50265-2-1 / IEC 60332-1