34 NEBULA OPERATION
SPECIFICATIONS
CONSTRUCTION
Epoxy powder coat over zinc plated steel case. Legend silk-screened in solvent and abrasion resistant two pot epoxy ink.
FORM
3u high, 19 inch rack wide, with removable mounting wings. Rear support wings are available for touring cabinets
ELECTRONICS
Flash microprocessor with internal EEPROM for long life storage of all parameters. Digitally controlled SCR, IGBT or
Sinewave dimming module fitted depending on model. The internal Switch Mode power supply is rated at 90 vac to 265 vac,
45 to 65 hertz, and uses long-life 105 degree rated capacitors.
LCD DISPLAY
4 line, 20 character display, STN Blue with auto-dimming super-bright white LED backlight.
PUSH BUTTONS
“Alps” brand computer keys with custom moulded keycaps.
MCBs
6KA rated MCBs provide full overload and short-circuit protection of power devices.
FILTERING
Iron powder toroidal chokes for linear current rise and minimum EMI. Theatrelight can provide filtering to customer
standard on request.
COOLING
Long life low voltage speed controlled fan. Fan speed is proportional to temperature.
DMX CONNECTION
USITT DMX-512 1990 Digital multiplex system requiring twin twisted shielded cable approved for RS-422/485 of up to 600
metres. Dimmer refresh rate is every 22 milliseconds. Each Nebula presents 1/10
th
normal RS-485 unit load, allowing reliable
DMX operation.
Summary of Contents for NEBULA
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