P10
What is DMX:
There are 512 channels in a DMX connection. Channels may be assigned in any manner. A fixture capable of
receiving DMX will require one or a number of sequential channels. The user must assign a starting address
on the fixture that indicates the first channel reserved in the controller. There are many different types of DMX
controllable fixtures and they all may vary in the total number of channels required. Choosing a start address
should be planned in advance. Channels should never overlap. If they do, this will result in erratic operation
of the fixtures whose starting address is set incorrectly. You can however, control multiple fixtures of the
same type using the same starting address as long as the intended result is that of unison movement or
operation. In other words, the fixtures will be slaved together and all respond exactly the same.
DMX fixtures are designed to receive data through a serial Daisy Chain. A Daisy Chain connection is where
the DATA OUT of one fixture connects to the DATA IN of the next fixture. The order in which the fixtures are
connected is not important and has no effect on how a controller communicates to each fixture. Use an order
that provides for the easiest and most direct cabling. Connect fixtures using shielded two conductor twisted
pair cable with three pin XLR male to female connectors. The shield connection is pin 1, while pin 2 is Data
Negative (S-) and pin 3 is Data positive (S+).
Maintaining the Fixture:
To maintain optimum performance and minimize wear, fixtures should be cleaned frequently. Usage and
environment are contributing factors in determining frequency. As a general rule, fixtures should be cleaned
at least twice a month. Dust build up reduces light output performance and can cause overheating. This can
lead to reduced lamp life and increased mechanical wear. Be sure to power off fixture before conducting
maintenance.
Unplug fixture from power. Use a vacuum or air compressor and a soft brush to remove dust collected on
external vents. Clean all glass when the fixture is cold with a mild solution of glass cleaner or Isopropyl
Alcohol and a soft lint free cotton cloth or lens tissue. Apply solution to the cloth or tissue and drag dirt and
grime to the outside of the lens. Gently polish optical surfaces until they are free of haze and lint.
The cleaning of external optical lenses and/or mirrors must be carried out periodically to optimize light
output. Cleaning frequency depends on the environment in which the fixture operates. Damp, smoky or
particularly dirty surroundings can cause greater accumulation of dirt on the unit’s optics. Clean with soft
cloth using normal glass cleaning fluid. Clean the external optics at least every 20 days. Clean the fixture at
least every 30/60 days. Always dry the parts carefully after cleaning them. Never spin a fan using compressed
air.
LG500x
