BulbAmerica iLED-24 User Manual - 3. S
3. S
ETUP
Fixture Linking
You will need a serial data link to run light shows of one or more fixtures using a
DMX-512 controller or to run synchronized shows on two or more fixtures set to a
master/slave operating mode. The combined number of channels required by all the
fixtures on a serial data link determines the number of fixtures the data link can support.
Important: Fixtures on a serial data link must be daisy chained in one single line.
To comply with the EIA-485 standard no more than 32 devices should be
connected on one data link. 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.
Maximum recommended serial data link distance: 500 meters (1640 ft.)
Maximum recommended number of fixtures on a serial data link: 32 fixtures
Data Cabling
To link fixtures together you must obtain data cables. You can purchase
CHAUVET-certified DMX cables directly from a dealer/distributor or construct your own
cable. If you choose to create your own cable please use data-grade cables that can
carry a high quality signal and are less prone to electromagnetic interference.
DMX DATA CABLE
Use a Belden© 9841 or equivalent cable which meets the specifications for EIA RS-485
applications. Standard microphone cables cannot transmit DMX data reliably over long
distances. The cable will have the following characteristics:
2-conductor twisted pair plus a shield
Maximum capacitance between conductors – 30 pF/ft.
Maximum capacitance between conductor and shield – 55 pF/ft.
Maximum resistance of 20 ohms / 1000 ft.
Nominal impedance 100 – 140 ohms
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