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Doug Fleenor Designs DMX24DIM
24-Channel DMX Dimmer


The DMX24DIM is a twenty-four output dimmer designed for high efficacy loads, low idle power, and minimal losses.
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Doug Fleenor Designs DMX24DIM
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The DMX24DIM is a twenty-four output dimmer designed for high efficacy loads, low idle power, and minimal losses. Typical loads include Christmas light strings (LED and incandescent), and low power lamps such as LED, neon, compact fluorescent, electronic and magnetic low voltage, halogen and incandescent. Common applications include Christmas tree lighting, cue lights, signs, marquees, and practicals.

The dimmer is a single-space rack mount unit with removable rack ears. Airflow is front to side. Half inch holes are provided for half couplers or C clamps. The enclosure features a carry handle and a 3/8 inch safety cable slot.

The unit is DMX512-A compliant and ETL listed to UL 508. The DMX24DIM is a forward phase firing (leading edge firing) dimmer that use Triac power output devices. It is not capable of reverse phase firing.

Doug Fleenor Designs DMX24DIM Dimmer Specifications:

  • Input circuit: Protected EIA-485 receiver (LT1785); transient protected to 15KV, continuous to 60V
  • Input signal: 0.2 volts minimum, 12 volts maximum, DMX512, DMX512/1990, or DMX512-A
  • Input connector: Gold plated 5 pin male XLR (NeutrikD-1 series) 3 pin XLR optional
  • Input pass through: Gold plated 5 pin female XLR (Neutrik D-1 series). All five pins are passed through
  • Termination: None. Unused pass through connectors must be externally terminated
  • Power input: 120VAC 60 Hz 20 Amps at full load; actual current draw is 0.05A plus connected load
  • Power input connector:  NEMA 5-15P (15A U-ground) on 2-foot 12 gauge pigtail. Connector must be replaced with a 20A connector for full power use
  • Idle power: Less than 1 Watt
  • Power output: 120VAC 60 Hz 0.83 Amps maximum per output. No minimum load requirement
  • Output protection: None. Overloading of outputs can result in output failure
  • Output connectors: NEMA 1-15R (15A polarized ungrounded parallel blade)
  • Dimming circuit: Digitally fired, phase controlled 16 Amp snubberless triac (Alternistor) with high dv/dt driver. Triacs are screwdriver replaceable. One spare triac provided. A leakage control circuit on each output prevents ghosting of moderate loads
  • Rise time: 2 uS (10% to 90% at 90┬░ firing angle) at rated load
  • Dimming curve: Square law; visually appealing on LED lamps (120V), halogen lamps, magnetic low-voltage (MLV) and electronic low-voltage (ELV)
  • Non-dim curve: Optional factory programmed non-dims turn on at 60%, off at 40%. Outputs switch at zero crossing.
  • DMX footprint: Twenty-four consecutive DMX slots beginning with the selected DMX starting address
  • DMX starting address: Three digit front panel thumbwheel switch; address changes are immediate (no power cycling required)
  • Local control: "Address switch" setting of 601 turns on output 1, 602 turns on output 2, etc.
  • Chase mode: Factory programmed chase sequences are available
  • Status indicators:
    • Red POWER indicator
    • Green MIMIC 1 indicator mimics the intensity of output 1 (useful introubleshooting)
    • Green SIGNAL indicator illuminates when DMX512 is present; flashes when local control is active (address switch settings of 601 thru 624)
  • Cooling: Processor controlled low speed fan exchanges internal air from front to side
  • Isolation: DMX512 input is optically isolated from AC power circuits to 600 Volts
  • Color: Silver hammer tone with black front and rear panels
  • Safety listing: ETL listed to UL 508
  • Size (HxDxW): 1.7" x 10.5" x 19" (17" behindrack ears)
  • Weight: 7 lbs
  • Warranty: Five years parts and labor. Dimmer must be returned to Doug Fleenor Design for warranty repair. Shipping to Doug Fleenor Design is to be paid by the customer. Return ground freight is paid by Doug Fleenor Design. Warranty covers manufacturing defects

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