Doug Fleenor Designs 123-240V
DMX Isolation Amp & Splitter with a 208-240 Volt Option

OUR PART #  123-240V

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The 123-240V is a DMX512 Isolated Splitter / Amplifier from Doug Fleenor Design that comes in a three output from a single DMX input. This is part of a series of available standard configurations: three, five, or eleven outputs from a single DMX input. The 123-240V model is a three output splitter with each  output is electrically  isolated  from  the  input,  and  from  every  other  output,  by  2500  volt  optical  couplers. Each output has its own line driver and associated power supply.

The DMX splitter allows connection of DMX receivers (dimmers, color changers, moving lights, etc.) in a star configuration as opposed to a daisy chain configuration. In a star configuration, each control cable is run to a central point, in this case the splitter. In a daisy chain configuration all the devices are connected on one control cable, the output of one feeding the input of the next. It is not good practice to simply split a DMX control cable using a "wye" cable as this can cause signal corruption due to reflections.  

Typical uses of the splitter include splitting the control signal between stage right and stage left dimmers, running an isolated split to a string of color changers, splitting  and isolating a feed to a wall outlet for temporary or rented dimmers, isolating a stack of dimmerpacks from each other, etc.

Doug Fleenor Design 123-240V Specifications:

  • Input circuit: EIA-485 receiver with 120 ohm termination resistor between +Data and -Data (Units with feed through connectors do not have internal termination)
  • Input signal: 0.2 volts minimum, 12 volts maximum
  • Output circuit: EIA-485 driver
  • Connectors: Gold plated 5 pin Neutrik D-1 Series (3 pin connectors, terminal blocks, or RJ45 connectors optional)
  • Feed through: A non-isolated feed through connector is standard on the eleven output model and is optional on the one, three, and five output models.
  • Isolation: 2500 volt optical coupler, 1500 volt split bobbin transformer
  • Power input: 100 - 120 volts, 50/60 hertz, 12 watts (208 - 240 volt optional)
  • Color: Top, bottom and sides: Silver hammer tone
  • Front and back: Black
  • Outputs: 3
  • Size (DxHxW): 6.5" x 1.7" x 6.5"
  • Weight: 2.6 lbs.

Doug Fleenor Designs 123-240V
DMX Isolation Amp & Splitter with a 208-240 Volt Option

OUR PART #  123-240V

Product Information:

The 123-240V is a DMX512 Isolated Splitter / Amplifier from Doug Fleenor Design that comes in a three output from a single DMX input. This is part of a series of available standard configurations: three, five, or eleven outputs from a single DMX input. The 123-240V model is a three output splitter with each  output is electrically  isolated  from  the  input,  and  from  every  other  output,  by  2500  volt  optical  couplers. Each output has its own line driver and associated power supply.

The DMX splitter allows connection of DMX receivers (dimmers, color changers, moving lights, etc.) in a star configuration as opposed to a daisy chain configuration. In a star configuration, each control cable is run to a central point, in this case the splitter. In a daisy chain configuration all the devices are connected on one control cable, the output of one feeding the input of the next. It is not good practice to simply split a DMX control cable using a "wye" cable as this can cause signal corruption due to reflections.  

Typical uses of the splitter include splitting the control signal between stage right and stage left dimmers, running an isolated split to a string of color changers, splitting  and isolating a feed to a wall outlet for temporary or rented dimmers, isolating a stack of dimmerpacks from each other, etc.

Doug Fleenor Design 123-240V Specifications:

  • Input circuit: EIA-485 receiver with 120 ohm termination resistor between +Data and -Data (Units with feed through connectors do not have internal termination)
  • Input signal: 0.2 volts minimum, 12 volts maximum
  • Output circuit: EIA-485 driver
  • Connectors: Gold plated 5 pin Neutrik D-1 Series (3 pin connectors, terminal blocks, or RJ45 connectors optional)
  • Feed through: A non-isolated feed through connector is standard on the eleven output model and is optional on the one, three, and five output models.
  • Isolation: 2500 volt optical coupler, 1500 volt split bobbin transformer
  • Power input: 100 - 120 volts, 50/60 hertz, 12 watts (208 - 240 volt optional)
  • Color: Top, bottom and sides: Silver hammer tone
  • Front and back: Black
  • Outputs: 3
  • Size (DxHxW): 6.5" x 1.7" x 6.5"
  • Weight: 2.6 lbs.
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