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Data Cabling
To link products 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, 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:
Maximum capacitance between conductors:
Maximum capacitance between conductor and shield:
Maximum resistance:
Nominal impedance:
Cable Connectors
Cabling must have a male XLR connector on one end and a female XLR connector on the other end.
INPU
Do not allow contact between the common and the product's chassis ground. Grounding the
common can cause a ground loop, and your product may perform erratically. Test cables with an
ohm meter to verify correct polarity and to make sure the pins are not grounded or shorted to the
shield or each other.
Scorpion™ GBC User Manual
DMX connector configuration
COMMON
1
DMX +
3
2
-
DMX
Terminator
1
3
2
shielded, 2-conductor twisted pair
1
OUTPU
3
2
To avoid signal transmission problems
and interference, it is always advisable to
connect a DMX signal terminator.
120 ohm ¼ W resistor
between pin 2 (DMX -) and
pin 3 (DMX +) on the output
of the last product
22
30 pF/ft
55 pF/ft
20 ohms/1000 ft
100 ~ 140 ohms
August 2011
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