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RNB22 compact, high-efficiency primary switch mode power supply for DIN rail interface systems

RNB22 system power supply unit

System power supply unit for parallel operation with 100 to 250 V AC input and 24 V DC 2.5 A output as well as static/dynamic boost

RNB22
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5-year warranty

Engineered for Confidence

Our Fundamental Selection instruments feature an extended 5-year warranty – a clear testament of our trust in their long-term reliability and performance.

Should a warranty case occur, you can count on a fast replacement process and minimal administrative effort – giving you peace of mind when it matters most and helping you keep your operations running smoothly.

Warranty terms apply

The extended warranty is subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

RNB22 system power supply unit for 24 VDC / 2.5 A output
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©Endress+Hauser

RNB22 system power supply for DIN rails for one 4 wire sensor or transmitter

The RN Series interface devices
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RN Series interface devices

RN Series interface devices installed in a control cabinet
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RN Series compact interface devices being commissioned in a control cabinet

RNB22 system power supply for DIN rails for one 4 wire sensor or transmitter

Specs at a glance

  • Output

    24...28 V DC

  • Power Supply

    100…240 V AC/DC

Field of application

The RNB22 is a compact, high-efficiency primary switch mode power supply for DIN rail interface systems. It delivers a reliable, single-phase, 24 VDC / 2.5 A output and runs on a wide-range input from 100 to 240 VAC / 110 to 250 VDC, with a dynamic and static boost of 5 A and 3.125 A respectively.
When run in parallel with the RNF22 error message module, the RNB22 provides redundancy, increased capacity, as well as function monitoring to report critical operating states before errors occur.

  • High-efficiency 24 VDC / 2.5 A power supply with low power dissipation 

  • Parallel mode with RNF22 for redundancy 

  • Suited for decentralized applications or remote cabinets 

  • Compact housing efficient use of space in control cabinets 

  • Low heat dissipation, no lateral clearance required 

  • Ambient temperature range: –25 to 70 °C (–13 to 158 °F)

Benefits

  • Safe and reliable, single-phase output in the power range up to 100 W

  • Smart system function monitoring for fault prevention for high system availability

  • Powerful reserve capacity for lower power ranges

  • Transient surge protection, short-circuit proof, no-load proof

  • Tool-free installation, suited for vertical or horizontal mounting

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