Pepperl+fuchs safety barrier top explosion-proof is definitely not a legend

The explosion-proof principle of P+F multiplier Zener grid is to use a Zener diode to control the output voltage and a resistor to limit the output current. The circuit is relatively simple. When the production industry is working normally, the Zener safety barrier is equivalent to two resistors in series into the circuit, so there is no need to change the system structure. In addition, the Zener safety barrier has no influence on the accuracy of the original signal due to no signal transition.

China has strict and scientific regulations on intrinsically safe safety barriers. Only the enterprises that have passed the certification of the supervision station and the products they develop and produce can have the safety performance that meets the standards. The P+F Pepperl+Fuchs safety barrier uses high frequency as the fundamental wave to modulate and demodulate the signal. If the signal changes, the accuracy will be affected by the safety barrier circuit. Due to the high frequency oscillating circuit of the isolation safety barrier, radio frequency interference will be generated, which is detrimental to the system, and the isolation safety barrier is also relatively easy to damage. Safety barriers have strict requirements for intrinsic safety and explosion-proof. As a site explosion-proof product, the safety must be strict. When in use, the installation location must have a very reliable grounding system, and the grounding resistance of the Zener safety barrier must be less than 1Ω, otherwise the explosion-proof safety protection performance will be lost. Obviously, such requirements are very harsh and difficult to guarantee in actual engineering applications. Secondly, it is required that the field instruments from the dangerous area must be isolated, otherwise the signal cannot be transmitted correctly, and the signal grounding directly reduces the signal anti-interference ability and affects the system stability. Guilun independent reserve warehouses provide Pepperl+Fuchs import safety barriers for spot and futures. One penalty ten for fakes, one year warranty!