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C) ARCHITECTURAL RACK ENCLOSURES
(1) The rack enclosure shall be the Unison DRd Series Control Enclosure as
manufactured by Electronic Theatre Controls, Inc., or equal.
A) Mechanical
1) The Rack Enclosure shall be a surface mounted, deadfront switchboard,
constructed of 18-guage formed steel panels with a hinged, lockable full-height door
containing an integral electrostatic air filter.
a) Filter shall be removable for easy cleaning.
b) The enclosure shall support one control processor and one station power
module plus accessories
c) The enclosure door shall have an opening to allow limited access to the control
module face panel.
2) All rack components shall be properly treated and finished.
a) Exterior surfaces shall be finished in fine textured, scratch-resistant, epoxy
paint.
3) The fully digital rack enclosure shall be available with six or twelve dimmer module
spaces, one processor and a single station power supply, Rack dimensions and
weights (without modules) shall not exceed:
DRd6 21.9” H x 17” W x 9.6” D 38 lb.
DRd12 31.0" H x 17” W x 9.6” D 51 lb.
4) A single low-noise fan shall be located at the top of each rack. The fan shall draw
all intake air through the integral electrostatic air filter, over the surfaces of the
module housing and out the top of the rack.
a) The fan shall maintain the temperature of all components at proper operating
levels with dimmers under full load, provided the ambient temperature of the
dimmer room does not exceed 40°C/104°F.
b) In the event of an over-temperature condition, only the affected dimmer
module(s) shall shut down. A red indicator LED will flash and an error
message shall appear on the Control Processor.
5) Rack Enclosures shall be designed to allow easy insertion and removal of dimmer
and control modules without the use of tools. (230 volt racks with CE certification
shall require a screwdriver.)
a) Supports shall be provided for precise alignment of modules into power and
signal connector blocks.
b) With modules removed, racks shall provide clear front access to all load,
neutral and control wire terminations.
6) Rack Enclosures shall support use of any combination of rack option cards
designed to provide additional rack features. Rack option cards shall include:
a) FLO - The Fluorescent Option Board shall provide termination for 4 wire low
voltage electronic fluorescent dimming ballasts. FLO shall provide 24, 0-
10Vdc outputs.
b) DALI - The DALI Option Board shall provide termination for DALI fluorescent
dimming ballasts. DRd shall provide 24, DALI outputs for up to 63 ballasts
each in a broadcast mode.
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