CHAPTER 16

DMX512 and DMX512-A

Those parts of the system that you can hit with a hammer (not advised) are called hardware; those program instructions that you can only curse at are called software. —author unknown

When the Engineering Commission of the United States Institute of Theatre (USITT) set out to define the DMX512 protocol, they chose to adopt an existing standard for the +hardware used to transmit and receive data. As a result, the DMX512 standard defers to an existing standard from the computer electronics industry dealing with serial data transmission called TIA/EIA-485. It defines the electrical characteristics of generators and receivers used in balanced digital multipoint systems including the generator (in a DMX512 system this ...

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