Technical Data
CompareProcess transmitter
| Measuring Principle | Process transmitter |
| Measuring principle | Process transmitter |
| Function | Universal process and temperature transmitter with control unit |
| Loop power supply | 24 V intrinsically safe loop power supply |
| Power Supply | Wide range power supply 24 to 230 V AC/DC (-20 % / +10 %) 50/60 Hz |
| Input | 2 x universal (current, voltage, R, RTD, TC, resistance) |
| Output | 2 x Analog (current, voltage) |
| Software functions | Internal software for calculations, linearization, limit monitoring Monitoring of sensor wires according NAMUR NE43 Application package differential pressure measurement |
| Certificates | ATEX [Ex ia] CSA General Purpose CSA AIS, NI FM AIS, NI NEPSI [Ex ia] UK [Ex ia Ga], [Ex ia Da] marine approval KTA German WHG overfill protection IND Ex PESO Ex IND Ex PESO Ex IEC Ex |
| SIL | 2 |
| Display | LCD 7 segment Multicolour Bargraph TAG unit Colour change in case of failure |
| Interface | Not defined |
| Dimensions (WxHxD) | 45 x 115 x 118 mm (1.77" x 4.53" x 4.65") |
The process transmitter identifies, evaluates and calculates analog measured values. It can supply power to two-wire sensors via the built-in loop power supply. Universal inputs allow the connection of current, voltage, resistance thermometers and thermocouples. Limit values can be monitored and relays switched. Process signals can be transmitted via the analog output. The built-in “differential pressure” application package allows fast and easy commissioning of differential pressure applications.
Advantages
SIL 2 approval (optional), marine approval
1 or 2 calculated values and linearization table
Stores minimum/maximum values
5-digit 7-segment backlit LCD display
1 or 2 universal inputs
2 relays (optional)
Digital status output (open collector)
Areas of application
The RMA42 process transmitter has analog inputs for display, process and status signals, analog and digital outputs, and a setup interface. Connected sensors can be supplied by the built-in LPS. All measured and calculated values can be used as signal sources for display, outputs, relays and interfaces.
Plant and equipment design
Control rooms and cabinets
Process control, recording and supervision
Signal conditioning and conversion
Overflow protection (WHG)
Source:Endress+Hauserwebsite public information
Measuring principle video
Click to playSpare Parts & Accessories 21
21 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| RMA42X- | Spare part RMA42 RMA42X- | Enquire |
| RMA42X- | Spare part RMA42 RMA42X- | Enquire |
| 71096588 | terminal block | Details |
| 71096589 | terminal plug connector | Details |
| 71096593 | terminal plug connector | Details |
| 71096601 | terminal plug connector | Details |
| 71142411 | terminal plug connector | Details |
| 71164439 | terminal plug connector | Details |
| 71164440 | terminal plug connector | Details |
| RMA42T- | CPU board without display RMA42T | Enquire |
| RMA42X- | Spare part RMA42 RMA42X- | Enquire |
| 71096590 | terminal plug connector | Details |
| 71096591 | terminal plug connector | Details |
| 71096603 | terminal plug connector | Details |
| 71096611 | terminal plug connector | Details |
| 71142413 | terminal plug connector | Details |
| 71164441 | terminal plug connector | Details |
| TXU10- | Instrument Commissioning Kit TXU10用于可以PC编程调试的设备 程序设置+用于带USB接口的PC的连接线 | Enquire |
| 51516983 | Communication interface FXA291Serial USB Computer Interface Technical Data: - USB Version1.1 or higher - Power supply via USB - IP51; NEMA/Typ 3 - Ambient temperature: -20....+60oC - Ex: II(2) G (EEx ia) II C - ATEX: BVS 05 ATEX E 095 Scope of deliovery: Commubox FXA 291 MS Windows USB driver Device is submitted for CSA/FM application. The device may not be modified and may be used with intrinsically safe circuits with corresponding characteristics only (see safety certificate). | Details |
| 51002468 | housingIP66/1xPg13,5 4xPg11 | Details |
Configurator / Comparison
Manuals & Documents 5
All documents for this modelProduct Videos
Case Studies
Municipal Wastewater Treatment · Process Measuring and Control Instrument — Application Case
Application Context
the inlet, biological and outlet stages of a municipal plant is a typical Municipal Wastewater Treatment duty. The project started from Process Measuring and Control Instrument, focusing on measurement, control and recording for process loops.
Process Constraints
effluent parameters drift and probes foul with sludge and biofilm, and high solids and corrosive fractions, with large diurnal flow swings only amplify it. The Process Measuring and Control Instrument specification must therefore cover configured by input type, loop count and communication.
Delivery Approach
Delivery was handled as the system components range — supplying as a full cabinet and signal-chain configuration. Execution centred on configured by input type, loop count and communication, together with stable compliance with Grade 1A discharge limits and online data reporting.
Field Results
Operation shows the benefit clearly — configured on site, cutting back-and-forth during system commissioning, with confidence in this measuring point improving markedly.
Food & Beverage · Process Measuring and Control Instrument — Application Case
Customer Profile
The typical setting in Food & Beverage is dosing, pasteurising, filling and CIP stages. The measuring point is Process Measuring and Control Instrument; the focus is measurement, control and recording for process loops.
Key Difficulties
Conditions are syrups, dairy and beverages that scale easily, under strict hygienic requirements and, on top of that, frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles, which a standard configuration cannot handle for long. The design therefore starts with configured by input type, loop count and communication.
Implementation
The scope ran through the system components range: supplying as a full cabinet and signal-chain configuration. Technically it hinges on configured by input type, loop count and communication, and on these requirements: food-safety and hygienic design per 3-A / EHEDG.
Customer Benefit
In practice this means configured on site, cutting back-and-forth during system commissioning, which cut the workload on the site maintenance team.
Chemical & Pharmaceutical · Process Measuring and Control Instrument — Application Case
Project Background
The project covers reactors, metering vessels and finished-product tanks. The work centres on Process Measuring and Control Instrument and the core task is measurement, control and recording for process loops.
Operating Challenges
The medium and duty are characterised by highly corrosive media with solvents and crystallisation, partly in explosive atmospheres, and corrosion plus Ex protection shortens instrument life and makes downtime costly. So Process Measuring and Control Instrument cannot be specified generically — it calls for configured by input type, loop count and communication.
Solution
The Ainstru engineering team worked through the system components range: supplying as a full cabinet and signal-chain configuration. The configuration involves configured by input type, loop count and communication, with these requirements in view: Ex certification and GMP traceability of records.
Results
Since start-up the system has run steadily; the practical result is configured on site, cutting back-and-forth during system commissioning.
Power & Energy · Process Measuring and Control Instrument — Application Case
Project Overview
The site is boiler feedwater, turbine condensate and FGD/DeNOx systems. The customer wanted Process Measuring and Control Instrument properly configured on the existing plant, with the aim of measurement, control and recording for process loops.
Technical Challenges
What actually causes trouble is high temperature and pressure with both steam and saline water, and drift under high temperature and pressure, with very costly unplanned outages. All of this means the Process Measuring and Control Instrument configuration has to involve configured by input type, loop count and communication.
Configuration
Supply and installation were organised through the system components range: supplying as a full cabinet and signal-chain configuration. On site this meant configured by input type, loop count and communication, checked line by line against: compliance with power-industry codes and unit availability targets.
Performance
After commissioning the outcome is configured on site, cutting back-and-forth during system commissioning, and the readings are now used for process tuning.
Related Products
Endress+HauserField Indicator RIA14
Endress+HauserPanel Meter with Control Unit RIA45
Endress+HauserField Indicator RIA16
Endress+HauserPanel Meter RIA452
Endress+HauserField Meter with Control Unit RIA46
Endress+HauserLoop Powered Process Indicator RIA15
Endress+HauserContactor RTA421
VEGA