Speed controller

4Q transistor speed controller type DLRB 24/xx-496

Product information

4Q transistor speed controller type DLRB 24/xx-496

The DLRB 24/xx-496 Series transistor speed controllers are load-independent 4-Q motor speed controllers for brushed DC motors with integrated ballast unit. These controllers enable stepless speed control in clockwise and counterclockwise rotation up to a maximum motor current of 10A. The input voltage range is 10 – 48V DC. Stepless speed control can be realized either via an internal or external potentiometer or an external reference voltage of 0 – 5V DC or 0 – 10V DC. The motor power can be steplessly limited using an internal potentiometer as overload protection.


  • High pulse frequency of approx. 23 kHz allows for a quiet operation
  • Speed specification via 0 – 5V DC or 0 – 10V DC interface or potentiometer (external/internal)
  • Controller enable – input for activating the output stage (one input per direction)
  • Motor overload protection through internally adjustable current limitation
  • Acceleration/deceleration ramps adjustable via internal DIP switch, blocking protection can be activated via internal DIP switch
  • Controller/setpoint releases can be inverted via internal DIP switch
  • 8-bit processor
  • Speed control range 1:30 with EMF and I×R compensation, 1:500 with encoder
  • EMK feedback system with I×R compensation (or encoder)


Technical features

  • Input voltage 10 – 48V DC
  • Up to 10A motor current
  • With ballast unit for protection against generic energy


  • Sheet metal cover
  • Snap mechanism for 35 mm mounting rail
  • Ref. value potentiometer 1 gear or 10 gears
  • Switch-mode power supply: SNT24/xx Series; Input voltage 115/230V / AC 50/60Hz
  • Protection class: IP 00 (can be realized up to IP65 on customer request)



  • Circuit board design: 117 × 165 × 46 (L × W × H)
  • Housing design: 117 × 165 × 52 mm (L × W × H)
  • Connection: 19-pin spring clamp terminal


See instructions

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