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There are two types of P+F safety barriers: Zener and isolation barriers. The most commonly used is the isolation barrier. Pepperl+Fuchs Safety Barrier Isolation Barrier can effectively isolate the field loop signal in the hazardous area from the loop signal in the safe area. In this way, the intrinsically safe automatic control system does not require an intrinsically safe grounding system, which simplifies the construction when the intrinsically safe explosion-proof system is applied. The isolation barrier greatly enhances the anti-interference ability of the detection and control loop, and improves the reliability of the system.

Pepperl+Fuchs Safety Barrier

The P+ grid safety barrier uses fast fuses, current-limiting resistors or voltage-limiting diodes to limit the input electrical energy, so as to ensure the energy output to the hazardous area. Its principle is simple, the circuit is easy to realize, and the price is low, but its reliability in its application is greatly affected due to its own principle defects. Use isolated safety barriers, allow field instruments to be grounded, and allow field instruments to be non-isolated. The isolated safety barrier has many protective function circuits, and the possibility of accidental damage is small. On-site instrumentation is allowed to be overhauled with power, which can shorten the preparation time of the project and reduce the parking time. Pepperl+Fuchs safety barrier isolation barrier has strong signal processing capabilities. Such as switch input status control, mV, Pt100 change to 4-20mA and so on. This provides greater convenience, reasonableness and effectiveness to the application of field instruments and control systems. When users apply DCS and ESD at the same time, choose a safety barrier with one input and two output, which can effectively isolate the two systems and avoid mutual influence between the systems. Loop-powered isolated safety barriers maintain the advantages of active isolated safety barriers. Other P+F products include: P+F Pepperl+Fuchs encoder, P+F Pepperl+Fuchs photoelectric switch, P+F ultrasonic sensor, P+F Pepperl+Fuchs surge protector, P+F terminal, P+F Pepperl+Fuchs power supply, etc.