PR Electronics 2229 Switchmode Voltage Regulator


  • AC/DC input voltage
  • Adjustable output 5…24 VDC, max. 40 W
  • Adjustable from external potentiometer
  • Short-circuit protection
  • Thermal overload protection
  • Standard 11-pole relay socket

PR Electronics 2229 Switchmode Voltage Regulator is a highly efficient device designed for regulating voltage using primary switchmode technology. It features adjustable outputs and versatile application options, making it suitable for various industrial needs.

Advanced Features

  • High Efficiency: Based on primary switchmode technology, ensuring high efficiency.
  • Adjustable Outputs: The outputs are adjustable via a front potentiometer within the range of 5…24 VDC or from an external potentiometer.


  • General Voltage Regulation: Provides a stable 24 VDC supply for measurement systems requiring fixed stabilized voltage.
  • Versatile Supply: Suitable for supplying sensors, transmitters, or as a general variable voltage regulator within the range of 5…24 VDC.
  • Pre-Regulator Use: Can be used as a power-efficient pre-regulator for 5 VDC linear regulators (e.g., stepping down from 32 V to 8 V).
  • External Control: Functions as an adjustable power supply controlled from an external potentiometer.

Technical Characteristics

  • Power Indicator: A green LED indicates an active output.
  • AC/DC Input Compatibility: Accepts both AC and DC input voltages.
  • Polarity Flexibility: A rectifier bridge allows free choice of polarity for the DC input.
  • Mounting Options: Designed for mounting on a standard 11-pole socket, adaptable for DIN rail or plate use with PR’s 7023 adaptor and 7024 mounting keying.

PR Electronics 2229 Switchmode Voltage Regulator is a reliable and efficient solution for providing adjustable and stable voltage regulation, suitable for a wide range of industrial applications. Its high efficiency, flexible adjustment options, and robust protection features make it an ideal choice for various measurement systems and general voltage regulation needs.


Operating temperature -20°C to +60°C
Relative humidity < 95% RH (non-cond.)
Protection degree IP30
Dimensions (HxWxD) 80.5 x 35.5 x 84.5 mm (D is without pins)
Weight approx. 170 g
Internal power dissipation 10 W
Transient stability (10%-max. load) < 250 mV
Temperature coefficient 0.05% / °C
EMC immunity influence < ±0.5%
Input voltage (AC) Max. 28 VAC Min. VAC = ( Vout. + 5 ) / 1.2
Input voltage (DC) Max. 40 VDC Min. VDC = ( Vout. + 5)
Frequency 50…60 Hz
Current output
Current limit Typ. 5.8 A (short circuit)
Output voltage 4.5…26.4 VDC
Output power Max. 40 W
Output current Max. 2.5 A / 5 VDC Max. 2.5 A / 12 VDC
Max. 2.5 A / 15 VDC
Max. 1.7 A / 24 VDC
Load effect, (0-max. load) < 1.5% / A
Output ripple < 20 mVRMS
EMC 2014/30/EU
EAC TR-CU 020/2011


PR Electronic 2229 Switchmode voltage regulator-DpstarGroup