Blizzard Enclosure User Manual
page 42
Operating Modes
DEC3 may be run in one of three basic operating configurations. A fourth configuration is
provided for test and service use.
Standalone:
The enclosure operates independently, and automatically, requiring no user
intervention. User may set parameters such as temperature and humidity
thresholds, and monitor sensor information and DEC status at the DEC3 user
interface. Standalone is the default DEC3 shipping mode unless specified
otherwise at time of order. DMX is not required or utilized.
DMX/RDM Mode 1 (RDM Monitor
)
All of the Standalone features plus the ability to discover and monitor the DEC3
over a DMX512 connection, using RDM.
In this mode, the DEC3 does not need to “see” any DMX to operate. The mode
allows the use of RDM to set the various temperature thresholds, and monitor the
conditions inside the enclosure remotely. The fixture inside the Tempest
enclosure may also be an RDM enabled device.
DMX/RDM Mode 2 (DMX Enable)
All of the Standalone and RDM Monitor features plus the use of a single DMX
address (slot) to control the Lamp Relay.
This means that the user is responsible for maintaining a DMX input with the slot
(as selected as the DMX START ADDRESS on the DEC3) high. This slot level must
be set greater than 50% at all times when the internal fixture is to be powered.
This has the useful attribute of enabling the user to remotely force a hard reset of
the fixture by opening and then closing the Lamp Relay. It also means that it is
unnecessary to feed the enclosure with two power sources (for the enclosure and
the luminaire/projector), since the DMX slot may be used to isolate the projector
when not in use, without removing power from the enclosure. This mode is
recommended for show-control applications, where it is desirable to have power
control of the internal fixture, and accidental loss of the DMX data is very unlikely
to occur.
In the absence of DMX, the Lamp Relay defaults to “ON”.
All RDM functions are available for configuration and monitoring of the DEC3.
DMX/RDM Mode 3 (Service/Test)
This mode is intended for test and service use.
It gives the user direct control of the lamp, fan and heater relays over DMX. User
may NOT override any of the relays in an unsafe direction – for example, if the
DEC3 has determined the enclosure is over-temperature and has switched off the
lamp relay, the relay may not be overridden ON by DMX. In this sense, DMX ‘piles
