Fixture Linking; Data Cabling; Dmx Data Cable; Cable Connectors - Chauvet DJ Obey 4 Manual De Instrucciones

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.
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.

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:

Cable Connectors

Cabling must have a male XLR connector on one end and a female XLR
connector on the other end.
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.
5. Appendix
Maximum recommended serial data link distance: 500 m (1640 ft)
Maximum recommended number of fixtures on a serial data link: 32
Type:
Maximum capacitance between conductors:
Maximum capacitance between conductor and shield:
Maximum resistance:
Nominal impedance:
DMX connector configuration
COMMON
1
DMX +
INPUT
3
2
DMX
Terminator
1
3
2
15
shielded, 2-conductor twisted pair
1
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 fixture
30 pF/ft
55 pF/ft
20 ohms/1000 ft
100–140 ohms
OUTPUT