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RMA42 process transmitter with control unit

4-wire process transmitter with control unit as DIN rail device with up to two universal sensor inputs and optional SIL approval

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RMA42 process transmitter with control unit

4-wire process transmitter with control unit as DIN rail device with up to two universal sensor inputs and optional SIL approval

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Benefits

  • SIL 2 approval (optional); Marine approval
  • 1 or 2 calculated values and linearization table
  • Min./max. value saved
  • 5-digit 7-segment LC display, backlit
  • 1 or 2 universal inputs
  • 2 relays (optional)
  • Digital status output (Open Collector)
FLEXible answers to individual needs
Current product

RMA42 process transmitter with control unit

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  • Standard products
  • Reliable, robust and low-maintenance

What is FLEX?

FLEX selections
Technical excellence
Simplicity
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Fundamental selection Meet your basic measurement needs
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Lean selection Handle your core processes easily
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Extended selection Optimize your processes with innovative technologies
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Xpert selection Master your most challenging applications
Variable
Manufacturer's warranty

Engineered for confidence

Our instruments are designed for long‑lasting performance, precise measurement, and dependable operation in demanding industrial environments. Each product includes a standard manufacturer’s warranty that reflects our commitment to quality and to the trust you place in our solutions.

Should a warranty case occur, the device will be assessed and the applicable remedy will be provided in line with the warranty terms – helping ensure a reliable and efficient resolution and supporting continued operation of your measurement point.

Request for extended warranty

If you require extended warranty coverage, simply contact your local Endress+Hauser representative. Our experts will advise you on the available options to match your application and risk profile, helping you protect your investment, reduce unexpected repair costs, and ensure reliable long‑term operation beyond the manufacturer's warranty period.

Learn more

Warranty terms apply

The manufacturer's warranty and extended warranty are 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.

Services by your side

Right‑first‑time commissioning, worldwide

Endress+Hauser’s qualified service engineers ensure your measurement devices are commissioned right the first time, delivering application‑aligned accuracy, regulatory compliance, and operational confidence from startup onwards, anywhere in the world.

Remote support you can trust wherever you operate

With Endress+Hauser Smart Support, you benefit from faster issue resolution, higher uptime, reliable global expertise across the entire product lifecycle – and lasting peace of mind.

Committed to long‑term, sustainable performance

With deep field expertise, harmonized processes, and continuous monitoring, we accompany you with comprehensive service offerings – from initial start‑up through instrumentation maintenance to process optimization – as a true lifetime partner delivering improved outcomes.

For additional information, please contact your local Endress+Hauser representative.

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Select and download all technical documentation such as operating manuals, calibration certificates, approvals and CAD drawings conveniently bundled as a complete documentation package for your entire order or quote.

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Office situation support
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Product information

Product picture process transmitter RMA42
RMA42
Specifications
Measuring / Application task Process transmitter
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Description

Analog measured values are indicated, evaluated and calculated by the process transmitter. With the integrated loop power supply two-wire sensors can be powered. The universal inputs enable the connection of current, voltage, RTDs and TCs. Limit values can be monitored and relays can be switched. Via analog outputs process signals can be forwarded. The integrated application package "differential pressure" allows the quick and easy commissioning for differential pressure applications.

Field of application

The RMA42 process transmitter exhibits a display, analog inputs for process and status signals, analog and digital outputs, and an interface for configuration. Connected sensors can be powered by the integrated LPS. All measured and calculated values are available as a signal source for display, outputs, relays and the interface.

  • Plant and apparatus engineering
  • Control rooms and cabinets
  • Process control, recording and supervision
  • Signal adjustment and conversion
  • Overfill protection (WHG)
Benefits
  • SIL 2 approval (optional); Marine approval
  • 1 or 2 calculated values and linearization table
  • Min./max. value saved
  • 5-digit 7-segment LC display, backlit
  • 1 or 2 universal inputs
  • 2 relays (optional)
  • Digital status output (Open Collector)
Predecessors
Contactor RTA421, Process transmitter RMA421, Process transmitter RMA422, XTN170
Downloads
Most downloaded
Operating Instruction (BA)
BA RMA42 Process transmitter with control unit
English version - 01/2025
Download
Technical Information (TI)
TI RMA42 Process transmitter with control unit
English version - 01/2025
Download
Short Instruction (KA)
KA RMA42 Process transmitter with control unit
English version - 01/2025
Download
The CAD Drawings will be available after the configuration.
All downloads
61 Downloads
Technical Information (TI)
Most downloaded
TI RMA42 Process transmitter with control unit
English version - 01/2025
Download
Operating Instruction (BA)
Most downloaded
BA RMA42 Process transmitter with control unit
English version - 01/2025
Download
Short Instruction (KA)
KA RMA42 Process transmitter with control unit
English version - 01/2025
Download
Installation Instructions (EA)
RMA42X-HA Einbauanleitung für den Austausch des Display des RMA42
English version - 01/2025
Download
Installation Instructions (EA)
RMA42X-Nx Einbauanleitung für den Austausch des Powerbaord des RMA42
English version - 01/2025
Download
Installation Instructions (EA)
RMA42X-Nx Einbauanleitung für den Austausch des Mainboard RMA42
English version - 01/2025
Download
Installation Instructions (EA)
RMA42T- Einbauanleitung für den Austausch des CPU Karte inkl. Display RAM42
English version - 01/2025
Download
Installation Instructions (EA)
RMA42X-DA Einbauanleitung für den Austausch des Display des RMA42
English version - 01/2025
Download
Installation Instructions (EA)
RMA42X-Nx Einbauanleitung für den Austausch des Mainbaord des RMA42
English version - 01/2025
Download
Installation Instructions (EA)
RMA42X-Nx Einbauanleitung für den Austausch des Powerboard RMA42
English version - 01/2025
Download
Installation Instructions (EA)
RMA42T- Einbauanleitung für den Austausch der CPU-Karte des RIA42
English version - 01/2025
Download
Installation Instructions (EA)
RMA42X-HA Einbauanleitung für den Austausch des Front RMA42
English version - 01/2025
Download
Installation Instructions (EA)
RMA42X-DA Einbauanleitung für den Austausch des Display RMA42
English version - 01/2025
Download
Ex Safety Instruction (XA)
XA RMA42, ORMA42 ATEX:
II (1)G [Ex ia Ga] IIC
II (1)D [Ex ia Da] IIIC
English version - 03/2026
Download
Ex Safety Instruction (XA)
RMA42 CSA:
Control Drawing AIS, ANI, NI
120100112
English version - 03/2026
Download
Ex Safety Instruction (XA)
XA RMA42 [Ex ia Ga] IIC
English version - 10/2023
Download
Ex Safety Instruction (XA)
RMA42 FM:
Control Drawing AIS, ANI, NI
120100111
English version - 10/2009
Download
Ex Safety Instruction (XA)
XA RMA42 IND-Ex: [Ex ia Ga] IIC
English version - 11/2025
Download
Certificates FM/CSA (ZD)
Control Drawing CSA AIS, ANI, NI RMA42 Process Transmitter with Control Unit RMA42
Installation Notes for Hazardous Locations
English version - 04/2010
Download
Certificates FM/CSA (ZD)
Control Drawing FM approval AIS, ANI RMA42 Process Transmitter with Control Unit RMA42
Installation Notes for Hazardous Locations
English version - 04/2010
Download
Special Documentation (SD)
Device viewer Technical documentation in other languages
English version - 07/2021
Download
Special Documentation (SD)
SD Levelflex FMP54 Safety instructions for steam boiler approval
Guided level-radar as part of a limiting device for low level water and
high level water
English version - 05/2024
Download
Special Documentation (SD)
SIL manual RMA42 Functional Safety Manual for Process Transmitter RMA42
English version - 07/2019
Download
Special Documentation (SD)
Levelflex FMP54 Planning instructions for steam boiler approval Guided Level radar as a limiting device for low water an high water
levels
English version - 05/2024
Download

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Selection of compatible products

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Spare parts and accessories

Housing/housing accessories
Housing/housing accessories

Spare Parts RMA42

Housing/housing accessories
Housing/housing accessories
Order code RMA42X-
Drawing number 1,2,16,17
I/O module
I/O module

Spare Parts RMA42

I/O module
I/O module
Order code RMA42X-
Drawing number 4
Terminals
Terminals

Terminal plug 4p "11 12 13 14" blue

Terminals
Terminals
Order code 71096588
Drawing number 7
Terminals
Terminals

Terminal plug 4p "15 16 17 18" blue

Terminals
Terminals
Order code 71096589
Drawing number 8
Spare parts & accessories
Product picture process transmitter RMA42
RMA42

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Configuration details
Product picture process transmitter RMA42
RMA42
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CAD Drawings
Configuration support

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Add your product to the cart and request a quote. Whether it is un-configured, partially configured, or fully configured, our experts will contact you to complete the configuration and provide your quote.

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Contact us

Spare parts and accessories

Housing/housing accessories
Housing/housing accessories

Spare Parts RMA42

Housing/housing accessories
Housing/housing accessories
Order code RMA42X-
Drawing number 1,2,16,17
I/O module
I/O module

Spare Parts RMA42

I/O module
I/O module
Order code RMA42X-
Drawing number 4
Terminals
Terminals

Terminal plug 4p "11 12 13 14" blue

Terminals
Terminals
Order code 71096588
Drawing number 7
Terminals
Terminals

Terminal plug 4p "15 16 17 18" blue

Terminals
Terminals
Order code 71096589
Drawing number 8
Spare parts & accessories

Selection of compatible products

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