(DMX Connectivity cont.)
Number of Fixtures
DMX Data Cabling
Making Your Own
DMX Cable
DMX Cable Characteristics
DMX Cable Connectors
When using a DMX controller, the combined number of channels required by all the fixtures on the DMX daisy chain determines the number of fixtures the DMX controller has to support. Conversely, the number of onboard sliders, page buttons, and fixture buttons limits the number of discrete DMX channels a DMX controller can support.
To comply with the
You must use DMX compliant data cables to link two or more DMX compatible fixtures. You may purchase CHAUVET® certified DMX cables directly from a dealer/distributor or construct your own cable.
USITT recommends limiting the total length of the DMX cable (from the first fixture/controller to the last fixture) to 300~455 m (985~1,500 ft).
If you choose to create your own DMX cable, make sure to use
Do not use standard microphone cables for DMX applications because they cannot transmit DMX data reliably over long distances.
The DMX data cable must have the following characteristics:
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 |
Each DMX cable must have a male
DMX Connector Configuration
To DMX Input |
| To DMX Output | |
(Female) |
| (Male) | |
1 | Common |
| |
DMX + | 1 | ||
3 | 3 | ||
| |||
2 | DMX - | 2 | |
|
|
To avoid signal transmission | 1 | 120 ohm, ¼ W | ||
problems and interference, | ||||
connect a DMX signal terminator | 3 | resistor between | ||
pin 2 | (DMX | |||
to the last fixture in the | 2 | |||
pin 3 | (DMX +) on | |||
DMX daisy chain, as shown. |
| |||
| the output of the |
last fixture.
Page 24 of 26 | Intimidator™ Spot LED 350 User Manual (Rev. 02) |