Contactor RTA421
Technical Data
CompareProcess transmitter
| Measuring Principle | |
| Measuring principle | Contacter |
| Function | Display Power Switch |
| Loop power supply | 196...250 V AC 97...127 V AC 20...250 V AC/DC |
| Power Supply | Not defined |
| Input | 1 x analog (U, I) |
| Output | 1 x transmitter power supply |
| Software functions | Not defined |
| Certificates | - |
| SIL | Not defined |
| Display | LCD 6 mm (0.24") 4-digit Bargraph |
| Interface | Not defined |
| Dimensions (WxHxD) | 45 x 107.8 x 112 mm (1.77" x 4.24" x 4.41") |
The RTA421 contactor monitors industrial processes and ensures safe operation. The device analyzes current (0/4...20 mA) and voltage signals (0/2...10 V) and switches two independent relay outputs when values exceed or fall below preset alarm set points. Limit values are displayed side by side on the display. A bar graph continuously indicates the connected signal. Applications in the wastewater industry include pump control. Level measurement in silos can be implemented economically.
Advantages
2 relays for set point monitoring (with SPDT contacts)
Loop power supply for the connected sensor
LCD display of alarm set points and bar graph
Compact housing
Configuration via 3 keys on the front panel
DIN rail mounting, housing width 45 mm
Application
Plant and mechanical engineering
Panel builders
Process monitoring
Process control
E+H Product Configurator
Please enter the product model to configure
Product comparison
Please enter the product models to compare in the boxes below (max. three products)
Technical documentation
Technical data
Documents/Manuals/Software
Accessories/Spare parts
Source:Endress+Hauserwebsite public information
Case Studies
Municipal Wastewater Treatment — Wastewater Treatment Plant · Process Measuring and Control Instrument Application Case
Project Background
Municipal Wastewater Treatment customers at the Wastewater Treatment Plant stage have long faced the challenge of insufficient accuracy in effluent quality monitoring and instruments prone to contamination causing data drift, affecting compliance discharge, placing higher demands on the stability and measurement accuracy of Process Measuring and Control Instrument.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Process Measuring and Control Instrument for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Municipal Wastewater Treatment conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Food & Beverage — Food Production Line · Process Measuring and Control Instrument Application Case
Project Background
Food & Beverage customers at the Food Production Line stage have long faced the challenge of high hygienic measurement requirements, with inline instruments needing to withstand CIP/SIP cleaning while maintaining stable accuracy, placing higher demands on the stability and measurement accuracy of Process Measuring and Control Instrument.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Process Measuring and Control Instrument for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Food & Beverage conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Chemical & Pharmaceutical — Reactors and Storage Tanks · Process Measuring and Control Instrument Application Case
Project Background
Chemical & Pharmaceutical customers at the Reactors and Storage Tanks stage have long faced the challenge of highly corrosive media and complex conditions, requiring corrosion-resistant and explosion-proof instruments, placing higher demands on the stability and measurement accuracy of Process Measuring and Control Instrument.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Process Measuring and Control Instrument for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Chemical & Pharmaceutical conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Power & Energy — Power Plant Boiler and Turbine · Process Measuring and Control Instrument Application Case
Project Background
Power & Energy customers at the Power Plant Boiler and Turbine stage have long faced the challenge of unstable measurement under high temperature and pressure, with high maintenance and downtime costs, placing higher demands on the stability and measurement accuracy of Process Measuring and Control Instrument.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Process Measuring and Control Instrument for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Power & Energy conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Related Products
Endress+HauserField Indicator RIA14
Endress+HauserPanel Meter with Control Unit RIA45
Endress+HauserField Indicator RIA16
Endress+HauserProcess Transmitter + Control Unit RMA42
Endress+HauserPanel Meter RIA452
Endress+HauserField Meter with Control Unit RIA46
Endress+HauserLoop Powered Process Indicator RIA15
VEGA