RNF22 power feed-in and error message module

RNF22 power feed-in/error message module

Power feed-in/error message module for simple and redundant 24 V DC supply to T-connector with fault message monitoring

RNF22

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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.

RNF22 power and error message interface module — RNF22 power feed-in and error message module, 24 V DC with relay output

RN Series interfaces with the RNF22 power feed-in and error message module — RN Series interface devices with the RNF22 power feed-in and error message module

The RN Series interface devices with RNF22 power module installed in a control cabinet — RN Series interface devices with RNF22 power module being commissioned

RNF22 power feed-in and error message module, 24 V DC with relay output

Specs at a glance

Input

24 V DC
Output

Uin - 0,8 V
Power Supply

24 V DC

See all specifications

Field of application

The RNF22 is a power and error message module that provides a redundant 24 V_DC supply voltage to the DIN rail interface bus connector system for safe operations in hazardous areas. Intelligent error diagnostics alert of power supply failure, NAMUR group error messages or fuse error via a relay contact and a flashing LED. The compact interface module is protected against overvoltage and reverse polarity via diode decoupling.

Power and error message module for safe and reliable operations in hazardous areas
Single or redundant 24 V_DC supply voltage, up to 3.75 A supply current
Relay output for error message
Group error evaluation of connected NAMUR isolating amplifiers (RLN22)
Activation/deactivation of group error detection via DIP switch
Ambient temperature range: –20 to 60 °C (–4 to 140 °F)

Benefits

Safe and reliable 24 V_DC interface power supply, single or redundant
Intelligent diagnostics built-in: power supply failure or fuse error
Quick and easy wiring with plug-in terminals
Compact housing: 17.5 mm (0.69 in) for efficient use of space in control cabinets

Fundamental selection

Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Standard products
Reliable, robust and low-maintenance

Technical excellence

Simplicity

What is FLEX?

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Specialized products
Designed for demanding applications

Technical excellence

Simplicity

Variable

What is FLEX?

FLEX selections	Technical excellence	Simplicity
F L E X Fundamental selection Meet your basic measurement needs	Technical excellence	Simplicity
F L E X Lean selection Handle your core processes easily	Technical excellence	Simplicity
F L E X Extended selection Optimize your processes with innovative technologies	Technical excellence	Simplicity
F L E X Xpert selection Master your most challenging applications	Technical excellence	Simplicity Variable

Learn more about the FLEX selections

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Success stories

Remote monitoring via Bluetooth®

Setting up and monitoring equipment at an ammonia plant presents significant challenges. Engie Energía uses advanced technological solutions, like remote communication devices in hazardous areas.
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Automatic water dosing system of a reverse osmosis system

The Proline Promass E 300 flow meter and RA33 batch controller automate reverse osmosis water dosing, achieving precise accuracy of under 0.2%.
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9 documents

Technical Information (TI)

RNF22

Technical Information (TI)

English version - 10/2021

New version available in English

Power and error message module 24 V DC

Select other languages, versions and see details Hide selection and details

	EN
19/10/2021
03/05/2021

Language:	English
Version:	19/10/2021
File size:	939.8 KB
File name:	TI01586KEN_0221.pdf

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Short Instruction (KA)

KA RNF22

Short Instruction (KA)

Chinese version - 12/2022

New version available in English

24 V<sub>DC</sub>电源和错误信息模块

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	EN
27/12/2022
19/10/2021

Language:	Chinese
Version:	27/12/2022
File size:	1.4 MB
File name:	KA01460KZH_0322-00.pdf

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Fields of Activities (FA)

コンポーネントカタログ

Fields of Activities (FA)

Japanese version - 08/2022

New version available in English

HAW562-
HAW569-
MS20-
MS21-
RA33-
RB223-
RDL10-
READWIN-
RH33-
RIA14-
RIA15-
RIA16-
RIA45-
RIA452-
RIA46-
RID14-
RID16-
RID261-
RLN22-
RLN42-
RMA42-
RMC621-
RMS621-
RN22-
RN221N-
RN42-
RNB22-
RNF22-
RNO22-
RS33-
RSG30-
RSG35-
RSG40-
RSG45-
RXO20

Show details Hide details

Language:	Japanese
Version:	29/08/2022
File size:	11.7 MB
File name:	Fa00016k33ja_2019.pdf

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Innovation (IN)

RN Series Zuverlässige Signalverarbeitung und -aufbereitung

Innovation (IN)

German version - 06/2023

New version available in English

Spannungsversorgungen, Speisetrenner und
Trennschaltverstärker für Sensoren und
analoge Signale

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Language:	German
Version:	02/06/2023
File size:	3.9 MB
File name:	IN01216K09DE_02.23.pdf

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Innovation (IN)

RN Series

Innovation (IN)

French version - 09/2021

New version available in English

Traitement et conditionnement fiable des signaux

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Language:	French
Version:	08/09/2021
File size:	884.3 KB
File name:	IN01216K14FR_01.21-BD.pdf

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AI (Application note)

Saving energy with smart e-boiler monitoring

AI (Application note)

English version - 12/2025

New version available in English

Boosting sustainability with real-time energy insights

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Language:	English
Version:	19/12/2025
File size:	1.1 MB
File name:	AI01440K09EN01.25.pdf

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AI (Application note)

Energie sparen mit intelligenter E-Boiler Überwachung

AI (Application note)

German version - 12/2025

New version available in English

Mehr Nachhaltigkeit durch Echtzeit-Energieüberwachung

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Language:	German
Version:	22/12/2025
File size:	1 MB
File name:	AI01440K09DE01.25.pdf

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Manufacturer Declaration

Product family: Accessories: System components, Contactors/transmitters, Ecograph, Memo-Graph, Over voltage protector, Power supply and barrier, Process displays, Soliswitch

Manufacturer Declaration

English version - 11/2025

New version available in English

Product root: FMA90-, FTE20-, HAW566-, HAW568-, RA33-, RB223-, RH33-, RIA14-, RIA15-, RIA16-, RIA45-, RIA452-, RIA46-, RID14-, RID16
-, RLN22-, RLN42-, RMA42-, RN22-, RN42-, RNF22-, RNO22-, RS33-, RSG35-, RSG45-
Declaration number: HE_02283_01.25
Manufacturer specification: RoHS
Additional information: China RoHS

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	EN
28/11/2025

Language:	English
Version:	28/11/2025
File size:	303 KB
File name:	HE_02283_01.25.pdf

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UK Conformity Assessed

Product family: Accessories: System components

UK Conformity Assessed

English version - 12/2021

New version available in English

Product root: RNF22-
Declaration number: UK_00468_01.21

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Language:	English
Version:	01/12/2021
File size:	124.7 KB
File name:	UK_00468_01.21.pdf

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RNF22 power feed-in/error message module

Power feed-in/error message module for simple and redundant 24 V DC supply to T-connector with fault message monitoring

Specs at a glance

Input

Output

Power Supply

Field of application

Benefits

Fundamental selection

Success stories

Remote monitoring via Bluetooth®

Automatic water dosing system of a reverse osmosis system

Prevent grain dust ignition in bulk tanks & silos

Measuring principle

Measuring principle

Function

Power Supply

Input

Output

Certificates

Operation

Back

RNF22

KA RNF22

コンポーネントカタログ

RN Series Zuverlässige Signalverarbeitung und -aufbereitung

RN Series

Saving energy with smart e-boiler monitoring

Energie sparen mit intelligenter E-Boiler Überwachung

Product family: Accessories: System components, Contactors/transmitters, Ecograph, Memo-Graph, Over voltage protector, Power supply and barrier, Process displays, Soliswitch

Product family: Accessories: System components

Back

Terminal set 3pol. DIN rail screw

Terminal set 3pol. DIN rail push-in

Flap 17.5 W25 DIN rail housing

Power rail connector DIN rail 17.5mm

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