SoLED W840 User Manual Version 4.1 051915
PRELIMILARY
5
F
IXTURE
L
INKING
A DMX data link is needed to operate one or more fixtures with a DMX-512 lighting console. The combined
number of channels required by all of the fixtures on the DMX data link will determine the number of fixtures the
DMX data link can support. Maximum recommended DMX data link distance between fixtures: 984 ft. (300
meters).
Important: Fixtures on a DMX 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.
DMX
D
ATA
C
ABLE
Use a ProPlex
®
DMX cable or equivalent which meets the specifications for EIA RS-485 applications. Standard
microphone cables cannot transmit DMX data reliably over long distances. The data cable must have the
following characteristics:
2-conductor twisted pair plus a shield
Max. capacitance between conductors – 30 pF/ft.
Max. capacitance between conductor and shield – 55 pF/ft.
Max. resistance of 20 ohms / 1000 ft.
Nominal impedance 100-140 ohms
C
ABLE
/
C
ONNECTORS
Cabling must have a male XLR connector on one end and a female XLR connector on the other end.
DMX connector configuration
CAUTION: Do not allow contact between the common and the fixture’s chassis
ground. Grounding the
common can cause a ground loop, and your fixture 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.
