Protocol Converter
Before the advent of DMX 512
control signal
standard, manufacturers developed a number of proprietary
multiplex
communications protocols. Compulite developed C105, Strand developed AMX and D54. As DMX became the most widely used protocol, various from/to DMX converters have been developed.
DMX/Analog Demultiplexer DMX/Analog converter is used to
interface
the
console
DMX output with the dimmers that receive analog input.
Features:
Selectable status of memory retention feature maintains output
level
of last known value upon loss of input control signal
LED indicator for DMX presence.
Future of DMX
New advances such as multi-parameter moving lights and powerful PC-based control systems, have created the need for getting the status information from remote device. This feature is beyond the capabilities of the DMX 512 protocol. The promise of a new protocol doesn’t mean the end of DMX.
For example the “star “ wiring of Ethernet would be a major annoyance for cabling
moving light
fixtures on a truss. The best solution will be to take Ethernet from the console to the truss and then convert to DMX “ daisy “ chain .
DMX will continue to be the industry main stream as the most practical and cost-effective way to control equipment including dimmers , scrollers and moving lights .
Remote Device Management (RDM ) In parallel with the defining a new protocol based on Ethernet technology, ESTA is creating a new specification for DMX. Oneof the key features of the next generation DMX is Remote Device Management (RDM).
RDM allows a device to be remotely controlled, diagnosed and reprogrammed over the same DMX lines to which it is already connected. RDM will also report back to the console the operational status of the addressed unit, flagging trouble or error conditions such as a burnt – out lamp. With RDM, an operator can be warned that a remaining lamp life of a light fixture was getting low or that an access cover was not properly latched. It will also be possible for the
console
to remotely install an updated version of the device software.
With addition of RDM , DMX will be able to convert from a means to simply send DMX data to a complete bi-directional communication and equipment management system.
