PRG Controlling VARI-LITE Equipment Using DMX 512 - Manual (Page 58)

DMX512 R EFERENCE G UIDE
5 0 02.3004.0300.54
Series 200 Super Lamp Run Cable
Due to data signal degradation, standard Series 200 lamp cables should not be connected
for lengths greater than 100 feet. The super lamp run cable assembly can be run up to 500
feet and is recommended even for short runs of Virtuoso comm. This cable contains AC
and data conductors carried on three conductor, two pair composite runs. Data are carried
on two individually shielded pairs with a common drain wire. The conductor to shield
capacitance of the twisted pair data conductors is very low, allowing the cable to be run for
long distances with little signal degradation. This cable uses the same CPC connectors as
those on Series 200 lamp runs.
There is a practical limit to the number of cables that can be combined before minor signal
degradation occurs. No more than four cables should be strung together to maintain signal
integrity. This limits the number of connections (major sources of noise) to five (three
between cables and two at each end of string at equipment connection).
The cables are color-coded at each end to denote length: blue (100 feet), violet (150 feet),
brown (185 feet), green (200 feet), and gray (250 feet).
Note: In order to use this cable properly, the associated ACS rack must have been upgraded with the
Universal Repeater Board.