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Technical Data
ComparePower supplies & barrier
| Measuring Principle | Active barrier |
| Measuring principle | Active barrier |
| Function | 1-channel 2-channel Signal doubler |
| Loop power supply | 17,5 V ±1 V bei 20 mA open circuit voltage: 24,5 V ±5 % |
| Power Supply | 24 V DC |
| Input | 0/4…20 mA / HART feeding/not feeding |
| Output | 0/4…20 mA / HART active/passive |
| Certificates | ATEX Ex tc CSA C/US AIS JPN [Ex ia Ga], [Ex ia Da], Ex ec KC [Ex ia Ga], [Ex ia Da], Ex ec INMETRO [Ex ia Ga], [Ex ia Da], Ex ec NEPSI [Ex ia Ga], [Ex ia Da], Ex ec UK Ex tc, [Ex ia Ga], [Ex ia Da], Ex ec ATEX IECEx [Ex ia Ga], [Ex ia Da], Ex ec UL C/US DNV EAC [Ex ia Ga] IIC, [Ex ia Da] IIIC, Ex ec IIC Gc |
| SIL | SIL 2 SC 3 |
| Operation | HART |
The RN22 active barrier is available as a single-channel or dual-channel version, powers instrument loops for analog communication and safety instrumented systems up to functional safety level SIL 2 (SC 3). With intrinsically safe transparent HART® transmission mode, the interface reliably establishes a link between field instruments and the process control level. It is used in hazardous areas as an interface for two-wire/four-wire devices, provides a second isolated signal output and complies with NAMUR NE 175. It opens a second channel for process optimization without affecting conventional automation systems.
Advantages
Intrinsically safe interface module for use in safety instrumented systems up to functional safety level SIL 2 (SC 3), complying with IEC 61508
Fast and convenient wiring using screw terminals or push-in terminals, or power supply via the power rail T-connector
HART® interface on the front panel for convenient operation
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
Field of application
Single-channel or dual-channel active barrier, power supply or signal multiplier
Isolated transmission of 0/4 ... 20 mA analog signals (NAMUR NE 43)
Intrinsically safe certification for use in Zone 2 explosion-protected areas
Bidirectional HART® communication (transparent transmission mode)
Connection of two-wire and four-wire devices in hazardous areas
Ambient temperature range: -40 … 60 °C (-40 … 140 °F)
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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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