Beam 250 - RDM Protocol Usage Guidelines

10 hours, and the interval between the continuous starting of the fixture should not
be less than 10 minutes, otherwise it will not be triggered normally due to the
overheat protection of the bulb;
The closing time of switching valve shall not exceed 5 minutes. If it is necessary to
turn off the light for a long time, the control console (lamp control channel) shall be
used to turn off the fixture;
3. Precautions for using RDM
RDM is an extended version of DMX512-A protocol. It is a Remote Device Management
protocol. The traditional DMX512 protocol communication is one-way
communication. The protocol is based on the RS-485 bus. RS-485 is a time-sharing
multipoint and half duplex protocol. Only one port is allowed to output for the host
at a time. Therefore, the following points should be noted when using RDM:
The console or host equipment that supports RDM protocol hosts shall be used;
To use a two-way signal amplifier, the traditional one-way signal amplifier is not
suitable for RDM protocol, because the RMD protocol requires feedback data, and the
use of a one-way amplifier will block the returned data, resulting in no lamp search;
All fixtures must be set to DMX mode to ensure that there is only one host on the
signal line;
A 120ohm impedance matching resistor must be inserted between terminals 2 and 3
of the terminal plug. When the signal line is relatively long, reducing the signal
reflection will make the differential signal more stable, which is conducive to the
quality of communication;