DMX512


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DMX512

(Digital MultipleX 512) A unidirectional protocol for controlling theatrical lights and special effects machines. DMX512 was developed by the Entertainment Services and Technology Association (ESTA) in the late 1990s. Providing 512 channels per link, DMX512 is based on RS-485 electrical signaling. Up to 512 target devices are daisy chained together via "In" and "Out" sockets, and cables use 5-pin XLR connectors. Via gateways and the "Streaming ACN" protocol, DMX data can ride over IP and Ethernet. The latest version of DMX512 is officially USITT DMX512-A (2008). See XLR connector.

Remote Device Management (RDM)
Developed in 2005, RDM is an enhancement to DMX512 that provides two-way transmission between controller and RDM-compatible devices over the same lines. Because there is communications back to the controller, RDM units can report their identity and features to the lighting engineer. In addition, rather than climbing a ladder to a light in order to physically change its address, RDM is used to change address from the console. However, legacy DMX products that assume all packets are DMX without checking start codes can react inappropriately when RDM signals are transmitted.


DMX/RDM Theater Consoles
ETC is a major provider of DMX/RDM equipment, including consoles, light fixtures, rigging and networking. (Image courtesy of ETC, www.etcconnect.com)
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References in periodicals archive ?
For long-distance control it's simple to switch over to DMX operation and connect with the Luxium ZMX wireless transmitter that allows both DMX512 control and direct operation with user programmable sequences and modes.
The United States Institute for Theatre Technology publishes the DMX512 dimmer protocol standard.
Includes hardware and software support for remote connectivity, walking developers through implementation examples of leading lighting communications protocols such as DALI, DMX512 and PLC.
Despite the ubiquity of wireless devices in other applications, the lighting industry continues to use multiple, wired-data links to carry the universal DMX512 stage lighting and effects control standard.
38] ENTTEC Pty Ltd, "ENTTEC DMX512 Ethernet Gateway MK2 User Manual," Dec.
The EZ-Color solution now includes drivers for the DMX512 protocol, enabling designers to create an entire intelligent lighting network quickly and easily with no coding required.
Comprising 54 Luxeon LEDs, it is available in both remote controlled and DMX512 versions.
Each link is capable of operating on any one of three systems: GRAFIK Eye[R] 4000 or GRAFIK 6000[R] lighting control systems or USITT DMX512 protocol.
DMX512 is a standard for digital communication networks that are commonly used to control stage lighting and effects.