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KNICK
High availability and functional safety up to SIL3: ProLine P 22400 passive standard signal isolator
Berlin – The requirements on operational and safety-related circuits in plants are continuously growing which also affects the technical requirements on components. Often, functional safety can only be increased with much effort and at the expense of availability. Proving that high safety standards and high availability can go hand in hand, Knick present ProLine P 22400 passive standard signal isolators certified for applications with a SIL3 safety integrity level according to EN 61508.
The passive isolator’s safety functionality is the highly precise, linear transmission of 4...20 mA signals with a low transmission error of 0.08% full scale. A high level of functional safety can be achieved even in single-channel structure and without diagnostics. For instance, 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 a mean time between failures of 965 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 shocks 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. Knick provide a five-year warranty for all ProLine devices.
About ProLine
ProLine isolators and transmitters from Knick meet maximum quality requirements, performing excellently in every respect: signal integrity, conditioning, amplification, transmission characteristics, versatility, operation, and energy efficiency. Renowned for high reliability, ProLine devices are widely used with industrial measurement and control technology worldwide. Intelligent circuit designs with reduced hardware requirements achieve unmatched reliability levels.
