信号隔离放大器
Technical Data
ComparePower supplies & barrier
| Measuring Principle | Active barrier |
| Measuring principle | NAMUR isolating amplifier |
| Function | 1-channel, changeover contact 2-channel, normally open contact |
| Loop power supply | 8 V DC |
| Power Supply | 24 V DC |
| Auxiliary power supply / Loop power supply | 8 V DC |
| Input | NAMUR blocking: 2,1 mA |
| Output | relay contact |
| Certificates | ATEX [Ex ia Ga], [Ex ia Da], Ex ec nC UK [Ex ia Ga], [Ex ia Da], Ex ec nC |
| SIL | SIL 2 |
| Operation | DIP switch |
The RLN22 signal isolating amplifier has a compact single-channel or dual-channel design, is powered with 24 VDC and has a relay output. It ensures safe operation of proximity sensors or limit switches complying with IEC 60947-5-6 (e.g. Liquiphant FTL51B (NAMUR)).
The interface module monitors line faults such as open or short circuits in sensor or mechanical contact switch loops. The device can be used in hazardous areas and in safety instrumented systems up to safety integrity level SIL 2 in accordance with IEC 61508.
Advantages
Safe and reliable switching: trusted in critical process applications
Small, compact housing: optional dual-channel version with a width of only 12.5 mm (0.49 in), making efficient use of the space inside the control cabinet
Can be used in hazardous areas; certified for Zone 2 explosion protection
Up to safety integrity level SIL 2, complying with IEC 61508
Fast and convenient device wiring and commissioning: plug-in terminals, power supply and grouped error message module installed via the DIN rail bus connector
Field of application
The signal isolating amplifier transmits switching signals
Provides input signals for proximity sensors, open contacts or resistive load contacts
Galvanic isolation
Line fault monitoring of input loops and mechanical switch contacts
Grouped error messages via the DIN rail bus connector
Select the output relay contact and the next action (switching action or quiescent current response) via DIP switches
Ambient temperature range: –40...60 °C (–40...140 °F)
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Technical documentation
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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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