Fixture Linking; Data Cabeling; Dmx Data Cable - Varytec FLATBEAM DUO 48x8W RGBW User Manual

Table of Contents

4.3. 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 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 use of a DMX optically isolated splitter may

result in deterioration of the digital DMX signal. Maximum recommended serial data link distance:

500m (1640ft) maximum recommended number of fixtures on a serial data link: 32 Fixtures.

To link fixtures together you must obtain data cables. You can purchase certified DMX Cables

directly from a dealer/distributer 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.

Please use a 110 Ohms shielded cable or equivalent which meets the specifications for EIA-

485 applications. Standard microphone cables cannot transmit DMX data reliable over long

distances.

The cable will have following characteristics:

2 conductor twisted pair plus shield

,maximum capacitance between conductors- 30pF/ft.

Maximum capacitance between conductors and shield: 55pF/ft

Maximum resistance of 20Ohms/1000ft.

Nominal Impedance 100 – 140 Ohms

9 / 21

Table of Contents