Martin VDO Atomic Dot User Manual page 20

Using DMX512
In a DMX-controlled system, an RDM-compliant DMX lighting controller sends a DMX control data
signal over a DMX link to the junction boxes of the system, and then over the hybrid link to the
VDO Atomic Dot fixtures.
A DMX pass – through connector is not provided. If you need to connect multiple Junction Boxes
to the same DMX line, you must use an RDM-compliant splitter as described below.
The DMX link requires DMX cable. It can be maximum 300 m (1000 ft.) in length and must run in
one single daisy-chain, but it can be extended or split into branches using an RDM-compliant
amplifier/splitter such as the Martin® RDM 5.5 Splitter (P/N 90758150). Alternatively, you can run
the DMX signal from the controller over Ethernet cable using Art-Net protocol and convert it to a
DMX-compliant signal with an Art-Net to DMX converter.
The total length of DMX cable and Hybrid PDE cable combined must not exceed 300 m (measured
between lighting console, DMX node or DMX splitter and last fixture on the chain).
If you would like assistance with creating a DMX link, your Martin® supplier will be glad to advise.
The number of VDO Atomic Dots that you can control on one DMX link is limited by the number of
DMX channels the dots will use and the 512 DMX channels available in one DMX universe at the
DMX controller. Each time you have used 512 channels, you must create a new DMX link that is
connected to a new DMX universe on the controller. Note that this limit applies to the DMX link.
The maximum safety limits that apply to the chain of dots and cable (see "Safety limits for
connecting devices" on page 19) take priority and must be respected in all cases.
DMX512 data is connected to the junction box using the XLR5 connector. The pin-out is:
pin 1 = shield
pin 2 = cold (-)
pin 3 = hot (+).
Pins 4 and 5 in the XLR connectors are not used.
20 Martin VDO Atomic Dot user guide