Supmea explosion-proof metal rotor flowmeter wiring

Project Overview

In dangerous flammable and explosive places, metal rotor flowmeters must be explosion-proof. However, the explosion-proof type is divided into intrinsically safe explosion-proof type and explosion-proof type. This article will take you through the wiring diagram of the intrinsically safe explosion-proof metal rotor flowmeter.

When selecting the intrinsically safe explosion-proof type, it is necessary to configure related equipment - safety barrier to form an intrinsically safe explosion-proof system. Safety barriers are divided into zener type and isolation type.

The principle of the Zener safety barrier is to use the reverse breakdown characteristics of the Zener diode to limit the voltage in the circuit to a safe range. Its advantages are simple circuit and low cost, but its reliability is relatively low and it is easily affected by external interference and causes malfunction.

The principle of the isolation safety barrier is to use transformer or optocoupler isolation technology to convert electrical signals in the circuit into optical signal transmission, thereby avoiding sparks or arcs in the circuit. Its advantages are high reliability and strong anti-interference ability, but its cost is relatively high.