Blizzard Enclosure User Manual
page 16
DEC 3.2 Control – Introduction
Tempest Lighting and Projector Enclosures have been in daily use around the world for almost a
decade. Tempest enclosures protect expensive and delicate equipment in all climates, maintaining
a comfortable operating temperature, and preventing condensation – the real outdoor enemy.
DEC3.2
TM
– that’s
Digital Enclosure Control, third Generation, revision 2
– is the brain of your
Tempest enclosure. It will maintain the internal environment in a comfortable temperature and
humidity range, and prevent condensation – the real equipment killer. DEC3.2 monitors internal
temperature, humidity and lamp current at all times, and uses this information to control its lamp
relay, fan(s) and heater(s). It can report back over the DMX cable, using the RDM protocol (Remote
Device Management) if desired.
Unless otherwise specified, this version of the user guide refers to DEC3.2 units fitted with software version
0.1.xxx or later.
So, what does DEC3.2 actually DO?
The DEC3.2 Engine is the brains of the operation – here’s a layout:
This schematic shows
the relationship between
DEC3.2’s functional
elements.
The power supply is
universal 100-240V, but
fans and heaters are
either 120V or 230VAC,
and must be so
specified.
High-quality, high power
Electro-mechanical
relays provide two pole
power isolation for the
enclosed the
fixture/projector in the
event of an over-
temperature condition.
Fans and heaters are
switched using
generously overrated
Triac devices for
maximum reliability.
4 DMX connections are
provided to facilitate field
termination of DMX
inputs and outputs via
the enclosed fixture and
the controller.
C
ont
ro
ller
2 Pole 30A
Lamp Relay
30A Triac
Heater Switch
10A
A
Power Feed
DEC
Link through
DMX/RDM Input
DMX/RDM Output
to next enclosure
User Interface
Sensor Block
Heaters
Fans
