anagement or RDM
is a protocol enhancement to USITT DMX512
that allows bi-directional communication between a lighting or system controller and attached RDM compliant devices over a standard DMX line. This protocol will allow configuration, status monitoring, and management of these devices in such a way that does not disturb the normal operation of standard DMX512 devices that do not recognize the RDM protocol.
The standard was developed by the ESTA
Technical Standards and is officially known as "ANSI/ESTA E1.20, Entertainment Technology - Remote Device Management over USITT DMX512"
The standard can be purchased from the ESTA Foundation or ANSI
Information from this page should not be taken as authoritative source but as gateway to information as it becomes available. By no means should this article be used for the purposes of creating an RDM compliant device over any documents set forth from ESTA Technical Standards Working Group.
RDM Physical layer
The RDM protocol and the RDM physical layer were designed to be compatible with legacy equipment. All compliant legacy DMX512 receivers should be usable in mixed systems with an RDM controller (console) and RDM responders (receivers). DMX receivers and RDM responders can be used with a legacy DMX console to form a DMX512 only system. From a user’s point of view the system layout is very similar to a DMX system. The controller is placed at one end of the main... Read More