Chauvet LEGEND 550 User Manual download pdf (Page 12)

Legend™ 550 Spot User Manual 12 1/11/2010 11:36 AM

Fixture Linking

You will need a serial data link to run light shows of one or more fixtures using a DMX 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 fixtures 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 m (1640 ft)

Maximum recommended number of fixtures on a serial data link: 32

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 must

have the following characteristics:

Type: shielded, 2-conductor twisted pair

Maximum capacitance between conductors: 30 pF/ft

Maximum capacitance between conductor and shield: 55 pF/ft

Maximum resistance: 20 ohms/1000 ft

Nominal impedance: 100 ~ 140 ohms

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Chauvet LEGEND 550 User Manual Page 12