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DC speed controls are also referred to as SCR controls or DC motor controls or DC drive. They take 120/240VAC supply voltage and convert to DC for use with 90 and 180VDC armature DC motors. Because Dart also makes digital DC speed controls we define the products below as ‘analog’ to differentiate from their digital, microprocessor-based counterparts.

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153D Digital Pot Control - Features and Benefits

Trimpot Definition and Adjustment

150 Series OEM DC Motor Speed Control

The NEW Enclosed Digital Pot 150 Series is Available Now**

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153D Digital Pot Control - Features and Benefits

Trimpot Definition and Adjustment


  • Single or Dual Voltage 120/240 VAC, 50/60Hz
  • Adjustable horsepower settings
  • Male spade terminations standard
  • Full wave bridge supply
  • 1% speed regulation, ±1/2% with tach feedback
  • Adjustable Minimum speed
  • Adjustable Maximum speed
  • Adjustable IR Compensation
  • Adjustable Current Limit
  • Adjustable Acceleration
  • Adjustable Deceleration
  • Line voltage compensation
  • 5K ohm speed pot, knob & dial plate included
  • 50:1 speed range
  • Overload capacity: 200% for one minute
  • Transient voltage protection
  • Voltage following mode
  • Inhibit circuit
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Trimpot Definition and Adjustment

125D 1HP DC Speed Control

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Trimpot Definition and Adjustment


  • Dual Voltage 120/240 VAC, 50/60Hz
  • Adjustable horsepower settings
  • Barrier terminal strip
  • Full wave bridge supply
  • 1% speed regulation, ±1/2% with tach feedback
  • Adjustable Minimum speed
  • Adjustable Maximum speed
  • Adjustable IR Compensation
  • Adjustable Current Limit
  • Fixed Acceleration
  • Optional Adjustable Acceleration
  • Line voltage compensation
  • 5K ohm speed pot, knob & dial plate included
  • 50:1 speed range
  • Overload capacity: 200% for one minute
  • Transient voltage protection
  • Voltage following mode
  • Inhibit circuit
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Trimpot Definition and Adjustment

125DV200E 2HP NEMA 4X Enclosed

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Trimpot Definition and Adjustment


  • UL Listed, all models
  • MOV transient protection
  • Adjustable linear ACCEL and DECEL adjustment
  • Adjustable minimum and maximum speed limits
  • Adjustable Current Limit and IR Compensation
  • Line fused
  • Power ON/OFF switch
  • Power "ON" indicator
  • NEMA 4X enclosure
  • Auto Sensing Dual Voltage 120/240VAC input
  • Output Voltage 0-90/180Vdc
  • 1% speed regulation; 50:1 range
  • HP adjustable over 1/4 to 2HP range – no jumpers or resistors to change
  • Overload capacity 200% for 1 minute
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Understand AC Supply and Motor Connection

Trimpot Definition and Adjustment

253G 2HP NEMA DC Speed Control

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Understand AC Supply and Motor Connection

Trimpot Definition and Adjustment


  • Dual voltage - 120/240 VAC, 50/60Hz
  • Adjustable horsepower settings
  • Barrier terminal strip
  • Packaged bridge supply (fullwave)
  • 1% speed regulation; ±1/2% with tach feedback
  • Adjustable Minimum speed
  • Adjustable Maximum speed
  • Adjustable IR Compensation
  • Adjustable Linear Acceleration
  • Adjustable Current Limit
  • Line voltage compensation
  • 5K ohm speed pot, knob and dial included
  • Power on/off switch (enclosed models)
  • 50:1 speed range
  • Overload capacity: 150% for one minute
  • Transient voltage protection
  • Inhibit circuit
  • Enclosed models rated NEMA 4/12
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Trimpot Definition and Adjustment

15 Series FHP DC Speed Control

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Trimpot Definition and Adjustment


  • Dual voltage models of 12/24 VAC or 120/240 VAC input
  • Full wave bridge power supply > Adjustable Minimum speed
  • Adjustable Minimum speed
  • Adjustable Maximum speed
  • Adjustable IR Compensation
  • Fixed Acceleration
  • 5K ohm speed pot, knob & dial included
  • 25:1 speed range
  • 1% speed regulation
  • Overload capacity of 200% for 1 minute
  • Transient voltage protection
  • AC line fuse (Enclosed)
  • Power on/off switch and light (Enclosed)
Reversing DC Speed Control Discover More >

Trimpot Definition and Adjustment

130 Reversing DC Speed Control

Reversing DC Speed Control Discover More >

Trimpot Definition and Adjustment


  • Adjustable horsepower settings
  • Barrier terminal blocks
  • Full wave bridge supply
  • Adjustable Min speed
  • Adjustable Max speed
  • Adjustable IR compensation
  • Adjustable current limit
  • Fixed accel (0.5 sec)
  • Line voltage compensation
  • 5K speed pot, dial and knob included
  • 50:1 speed range
  • Overload capacity: 200% for 1 min
  • Transient voltage protection
  • Onboard dynamic brake resistor
  • Automatic DB on power loss
  • 1% speed regulation
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Trimpot Definition and Adjustment

530B 3HP DC Speed Control

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Trimpot Definition and Adjustment


  • Dual 120/240 VAC, 50/60Hz via slide selector switch
  • Adjustable horsepower settings
  • Barrier terminal strip
  • Packaged bridge supply (fullwave)
  • 1% speed regulation; ±1/2% with tach feedback
  • Adjustable Minimum speed
  • Adjustable Maximum speed
  • Adjustable IR Compensation
  • Adjustable Linear Acceleration (0.3 to 12 sec.)
  • Adjustable Linear Deceleration (0.6 to 12 sec.)
  • Adjustable Current Limit
  • Line voltage compensation
  • 5K ohm speed pot, dial and knob included
  • 50:1 speed range
  • Overload capacity: 200% for one minute
  • Transient voltage protection
  • Inhibit circuit
  • Enclosed models rated NEMA 4/12

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