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ROCKLITE TRI LED Manual Rev. B Copyright (c) 2011 Blizzard Lighting, LLC
3. SETUP
Fuse Replacement
CAUTION! The ROCKLITE™ TRI utilizes a high-output switch-mode
power supply with an internal fuse. Under normal operating condi-
tions, the fuse should not require replacement. The fuse is fi eld
replaceable, however it is an advanced procedure suited to qualifi ed
individuals. Should your ROCKLITE™ fuse require replacement, please
contact Blizzard Lighting for instructions, or to return your unit for
service.
Connecting A Bunch of ROCKLITE™ TRI Fixtures
You will need a serial data link to run light shows using a DMX-512
controller or to run shows on two or more fi xtures set to sync in mas-
ter/slave operating mode. The combined number of channels required
by all the fi xtures on a serial data link determines the number of fi x-
tures the data link can support.
Fixtures on a serial data link must be daisy chained in one single line.
Also, connecting more than 32 fi xtures on one serial data link without
the use of a DMX optically-isolated splitter may result in deterioration
of the digital DMX signal.
The maximum recommended cable-run distance is 500 meters (1640
ft). The maximum recommended number of fi xtures on a serial data
link is 32 fi xtures.
Data/DMX Cabling
To link fi xtures together you’ll need data cables. You should use data-
grade cables that can carry a high quality signal and are less prone to
electromagnetic interference.
For instance, Belden© 9841 meets the specifi cations for EIA RS-485
applications. Standard microphone cables will “probably” be OK, but
note that they cannot transmit DMX data as reliably over long distanc-
es. In any event, the cable should have the following characteristics:
2-conductor twisted pair plus a shield
Maximum capacitance between conductors – 30 pF/ft.
Maximum capacitance between conductor & shield – 55 pF/ft.
Maximum resistance of 20 ohms / 1000 ft.
Nominal impedance 100 – 140 ohms