Seite 39
Setting up a DMX connection
DMX is a standardized transmission protocol that allows all DMX‐compatible models of the various
manufacturers to be connected to one another and controlled by a single mixer. Free DMX data
transfer between different DMX devices are used.
The connection arrangement between the devices has no influence on the DMX addressing. For
example, DMX address 1 has been assigned to a device and it can be positioned at any point of the
DMX connection, at the beginning, at the end or anywhere in the middle.
Therefore the first device, which is controlled by a controller, can be the last one in a row at the same
time. When DMX address 1 has been assigned to a device, the DMX controller knows to which address
the data transfer set, regardless of the location of the DMX cable device.
Resistance 120 ohms 1 / 4w between PIN 2 DMX ‐) and PIN 3 (DMX +) of the last headlight.
Attention:
Avoid the contact between the general and the housing earthing of the spotlight. The
general grounding may cause a loop and your headlight could only work irregularly. Test the cables
with a resistance meter to check the correct polarity and to ensure the correct polarity.
Connect the headlights:
If you want to control light shows with one or more devices with a DMX‐512 controller, or you want to
play synchronized shows with two or more devices in master / slave mode, you must use a serial data
transmission line. The total number of channels required by all devices determines the number of
devices that the data transmission line can support.
The devices connected to a serial data transmission line must be connected in series. According to the
standard EIA‐485, no more than 30 devices should be connected to a data transmission line. However,
if you connect more than 30 devices to a serial data transfer line without using an optical splitter, the
quality of the DMX signal may be degraded.
Maximum recommended length of the DMX data transmission line: 100m
Maximum recommended number of headlights on a DMX data transmission line:
30 devices
