Technical Data
ComparePower supplies & barrier
| Measuring Principle | Active barrier |
| Measuring principle | NAMUR isolating amplifier |
| Function | 2-channel, changeover contact |
| Loop power supply | 8 V DC |
| Power Supply | 20...250 V AC/DC |
| Auxiliary power supply / Loop power supply | 8 V DC |
| Input | NAMUR blocking: 2,1 mA |
| Output | relay contact |
| Certificates | ATEX IECEx [Ex ia Ga], [Ex ia Da], Ex ec nC UK [Ex ia Ga], [Ex ia Da], Ex ec nC DNV |
| SIL | SIL 2 |
| Operation | DIP switch |
The NAMUR signal amplifier ensures safe switching of proximity switches complying with EN 60947-5-6 (NAMUR), normally open contacts with resistive coupling elements and mechanical contact switches. It is connected to a universal power supply (24...230 V AC/DC), with one relay output (changeover contact) per channel. The device is intrinsically safe (Ex i) certified and can be used in Zone 0 (gas) and Zone 20 (dust) explosion-protected areas. The RLN42 can be connected in series in SIL 2 safety instrumented systems (complying with IEC 61508).
Advantages
Pluggable terminals for fast and simple device wiring
Can be connected in series in SIL 2 (IEC 61508) safety instrumented systems
Compact housing with a width of only 17.5 mm (0.69 in), making efficient use of space
Three-way galvanic isolation
Field of application
Signal amplifier that outputs switching signals
Wide voltage range (24...230 V AC/DC)
Input: proximity switches complying with NAMUR (EN 60947-5-6), float switches or resistively coupled contact switches
Input loop fault monitoring, e.g. open circuit and short circuit (LFD), detectable separately
Input loop line fault monitoring, e.g. open circuit and short circuit (LFD), detectable separately
Ambient temperature range: -40...60 °C (-40...140 °F)
Can be installed for use in Zone 2 / Div 2 explosion-protected areas
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Source:Endress+Hauserpublic information from the website
Case Studies
Municipal Wastewater Treatment — Wastewater Treatment Plant · Power Supplies and Safety Barriers 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 Power Supplies and Safety Barriers.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Power Supplies and Safety Barriers 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 · Power Supplies and Safety Barriers 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 Power Supplies and Safety Barriers.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Power Supplies and Safety Barriers 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 · Power Supplies and Safety Barriers 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 Power Supplies and Safety Barriers.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Power Supplies and Safety Barriers 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 · Power Supplies and Safety Barriers 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 Power Supplies and Safety Barriers.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Power Supplies and Safety Barriers 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.
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