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9
Note:
The following DMX-512 Control section explains how to select a DMX start
address for your fixture. It also covers connecting data cables, proper termination,
specific channel assignments and channel value tables.
DMX-512 Control
Fixtures require a "Start Address" from 1 to 512, setting the first DMX channel containing data
for the fixture (see DMX Background). Before addressing fixtures, consult the manual of the
system’s DMX controller to select a desirable addressing scheme. Valid Start Addresses range
from 1 to 512. Fixtures requiring more than one channel for control will read subsequent
channels up to the total number of channels required. In 5 channel mode, the fixture would
require 5 channels of DMX, if set to a Start Address of 6 it would use data from channels: 6 and
7, 8, 9, 10. Choose a Start Address so the channels used DO NOT overlap with other fixtures.
In some cases, it may be desirable to set two or more same type fixtures to the same Start
Address. In this case, the fixtures will be slaved together and respond to the same data.
Because all fixtures see the same data, fixtures may be set to any address without concern for
the order they are connected by the DMX cables.
DMX Data Connection
This fixture uses both 3 and 5 pin XLR type connectors and shielded twisted pair cable
approved for EIA-422/EIA485 use. Fixtures are connected in Daisy Chain topography:
Connection is made from the controller to the DMX-IN of the first light, then from the
DMX-OUT to the DMX-IN of the next light and so on. Only one data source can be on a
chain and no branching is allowed. The physical order in which the fixtures are
connected is not important, use the most convenient.
Data Terminator
A Data Terminator can be connected to the DMX-OUT of the
last fixture to reduce the effects of signal noise; it is not required
for all installations. To make a Terminator, connect a 120-ohm
¼ watt resistor across pin 2, Data Negative (S-) and pin 3, Data
positive (S+). Whether it is a 5 pin XLR or 3 pin XLR connector
(shown on right) does not matter, the pin numbers remain the
same. A qualified technician can determine if a Data Terminator
is needed.
DMX-IN
1
2
3
- Ground
- Signal (-)
- Signal (+)
XLR Connector - Plug:
DMX-OUT
1
2
3
- Ground
- Signal (-)
- Signal (+)
XLR Connector - Socket:
1
2
3
4
5
- Ground
- Signal (-)
-
-
-
S
(Unused)
ignal
(+)
1
2
3
4
5
1
2
3
4
5
- Ground
- Signal (-)
-
-
-
S
(Unused)
ignal
(+)
1
2
3
4
5