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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Source:Endress+Hauserpublic information from the website