The demand for requirements of functional and safety-related circuits is continuously growing in industries with complex processes. This definitely affects the technical requirements on components. Manufacturing precise SIL Rated circuits needs lots of effort and is often noted that functional safety can only be increased at the expense of availability. However, our SIL 3 rated signal isolator ProLine P 22400 demonstrates that high safety standards and high availability can go hand in hand!
With its highly precise (0.08% full scale), linear transmission of 4…20 mA signals, the passive SIL 3 rated signal isolator ensures a high level of functional safety, even in single-channel structure and without diagnostics. It is certified for applications with a SIL3 safety integrity level according to EN 61508. Sensors and actuators in safety circuits can be connected directly, requiring no elaborate evaluation equipment for redundant structures. The isolator’s robust design ensures excellent availability with an MTBF of 1106 years!!
Thanks to loop-powered operation, it contains fewer parts than devices with an auxiliary power unit and the total failure rate is decreased. Furthermore, it is mechanically stable, approved for marine applications, resistant against electromagnetic interferences, and boasts protection against electric shock up to 600 V AC/DC through reinforced insulation.
The test voltage during routine testing is 5.4 kV AC. ProLine P 22400 is suitable for ambient temperatures between -40 and 85 °C.