Specs at a glance
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Input
0/4…20 mA / HART
feeding/not feeding -
Output
0/4…20 mA / HART
active/passive -
Power Supply
24 V DC
Field of application
The 1- or 2-channel RN22 active barrier powers analog instrument loops and safety instrumented systems up to SIL 2 (SC 3). The intrinsically safe, HART® transparent interface establishes a reliable link between field devices and process control. It interfaces with 2-/4-wire devices in hazardous areas and provides a second galvanically isolated signal output acc. to NAMUR NE 175. This opens a second channel for the process optimization domain without affecting the traditional automation system.
Single- or two-channel active barrier, power supply or signal doubler
0/4 to 20 mA analog signal transmission (NAMUR NE 43) and galvanic isolation
Intrinsic safety for operation in hazardous areas (Zone 2)
Bidirectional HART® communication (transparent)
2- and 4-wire capability for instruments in hazardous areas (Zones 0/20)
Ambient temperature range: -40 … 60 °C (-40 … 140 °F)
Benefits
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Intrinsically safe interface device suited for use in safety instrumented systems up to SIL 2 (SC 3) in accordance with IEC 61508
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Quick and easy wiring with screw or push-in terminals or power supply via power rail T-connector
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Easy access to frontside HART® connection taps
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Compact housing: up to two channels on 12.5 mm (0.49 in) for efficient use of space in control cabinets
Videos
Fundamental selection
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Simple products
- Easy to select, install and operate
Technical excellence
Simplicity
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Standard products
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
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Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
Variable
| FLEX selections | Technical excellence | Simplicity |
|---|---|---|
Fundamental selection Meet your basic measurement needs |
Technical excellence
|
Simplicity
|
Lean selection Handle your core processes easily |
Technical excellence
|
Simplicity
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Extended selection Optimize your processes with innovative technologies |
Technical excellence
|
Simplicity
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Xpert selection Master your most challenging applications |
Technical excellence
|
Simplicity
Variable |
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Predecessor
Success stories
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Most downloaded
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Technical Information (TI)
TI RN22
English version - 04/2025
Active barrier
EN 09/04/2025Language:
English
Version:
09/04/2025
File size:
875.6 KB
File name:
TI01515KEN_0325-00.pdf
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Operating Instruction (BA)
BA RN22
English version - 04/2025
Active barrier, 1-/2-channel/SD for 4 to 20 mA, HART®-transparent with 24 V <sub>DC</sub> as well as active/passive input and output , optionally available with SIL and Ex
EN 14/04/2025Language:
English
Version:
14/04/2025
File size:
1.8 MB
File name:
BA02004KEN_0325-00.pdf
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8 documents
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Technical Information (TI)
TI RN22
Active barrier
EN 09/04/2025Language:
English
Version:
09/04/2025
File size:
875.6 KB
File name:
TI01515KEN_0325-00.pdf
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Operating Instruction (BA)
BA RN22
Active barrier, 1-/2-channel/SD for 4 to 20 mA, HART®-transparent with 24 V <sub>DC</sub> as well as active/passive input and output
, optionally available with SIL and ExEN 14/04/2025Language:
English
Version:
14/04/2025
File size:
1.8 MB
File name:
BA02004KEN_0325-00.pdf
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Short Instruction (KA)
KA RN22
Active barrier, 1-/2-channel/SD for 4 to 20 mA, HART®-transparent with 24 V <sub>DC</sub> as well as active/passive input and output
, optionally available with SIL and ExEN 21/04/2025Language:
English
Version:
21/04/2025
File size:
562.2 KB
File name:
KA01449KEN_0525-00.pdf
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Ex Safety Instruction (XA)
XA RN22, RN42
Ex tc IIIC Dc
Language:
Portuguese
Version:
31/01/2023
File size:
359.9 KB
File name:
XA03109KPT_0123-00.pdf
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AI (Application note)
Saving energy with smart e-boiler monitoring
Boosting sustainability with real-time energy insights
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
Mehr Nachhaltigkeit durch Echtzeit-Energieüberwachung
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
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 RoHSEN 28/11/2025Language:
English
Version:
28/11/2025
File size:
303 KB
File name:
HE_02283_01.25.pdf
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Explosion Protection
Product family: Power supply and barrier
Product root: RN22-, RN42-
Region: Japan
Approval agency: CML
Protection: Ex [i] Zone 0, Ex [i] Zone 20Language:
Japanese
Version:
27/04/2023
File size:
233.9 KB
File name:
CML 23JPN2099X JP-EN Iss0.pdf
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Search spare parts by number in drawing
60 spare parts & accessories
60 spare parts & accessories
60 spare parts & accessories
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Terminal set 2pol. DIN rail screw
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further parts
Order code71505292 -
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Terminal set 2pol. DIN rail push-in
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further parts
Order code71505320 -
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Flap 12.5 W25 DIN rail housing
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further parts
Order code71505347 -
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Power rail connector DIN rail 12.5mm
Order code71505349
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