Blizzard Lighting Quadra ProPar (Rev B) - Manual (Page 7)

Page 7
ProPar Quadra LED Manual Rev. B Copyright (c) 2012 Blizzard Lighting, LLC
3. SETUP
Fuse Replacement
CAUTION! Always replace with the same fuse type and size! To re-
move the fuse, locate the fuse holder on the back of the unit. Using a
philips-head screwdriver, remove the fuse carrier from the unit, replace
the fuse, and replace the fuse.
Connecting A Bunch of ProPar™ LED 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