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
DMX Data Cable
Use a Belden© 9841 or equivalent cable which meets the specifications for EIA
Type: | shielded, | |
Maximum capacitance between conductors: |
| 30 pF/ft |
Maximum capacitance between conductor and shield: | 55 pF/ft | |
Maximum resistance: |
| 20 ohms/1000 ft |
Nominal impedance: |
| 100 ~ 140 ohms |
Cable Connectors
Cabling must have a male XLR connector on one end and a female XLR connector on the other end.
DMX connector configuration
COMMON
| 1 | DMX + | |
INPUT | 3 | ||
| |||
| 2 | DMX - | |
|
|
1 3 
2
1
3 
OUTPUT
2
120 ohm ¼ W resistor between pin 2 (DMX
To avoid signal transmission problems and interference, it is always advisable to connect a DMX signal terminator.
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.
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
Maximum recommended serial data link distance: 500 m (1640 ft)
Maximum recommended number of fixtures on a serial data link: 32
5. Appendix | 13 | 4/19/2010 1:08 PM |