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Pocket Cosmos™ Manual Rev. A
© 2019 Blizzard Lighting, LLC
3. SETUP
Fuse Replacement
Remove the fuse holder from of its housing. Then take out the dam-
aged fuse from its holder and replace with exact same type of fuse.
Reattach the fuse holder, and then reconnect power.
Connecting A Bunch of Pocket Cosmos™ 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 fixtures set to sync in mas
-
ter/slave operating mode. The combined number of channels required
by all the fixtures on a serial data link determines the number of fix
-
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 fixtures 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 dis-
tance is 500 meters (1640 ft). The maximum recommended number
of fixtures on a serial data link is 32 fixtures.
Data/DMX Cabling
To link fixtures 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 specifications 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
Before replacing the fuse, disconnect the power cord.
ALWAYS replace it with the same type and rating.
