Ex Isolating Amplifiers/Isolators

Intrinsically safe isolation amplifiers are an elemental type of intrinsically safe interface designed to protect electrical circuits with analog input or output located in potentially hazardous areas. They include electronic components ensuring galvanic isolation of input, output and supply circuits. Optocouplers are used with a magnetic coupling, all in a special design according to ČSN EN 60079. The input (or output) circuits, whose clamps are connected to wires leading to hazardous area are also equipped with protective diode blocks (including Zener diodes) in combination with fuses and resistors. Diodes limit the voltage applied to the intrinsically safe circuit and defect-free constraint resistors,maximum current that can flow through the circuit. Are used as an interface between the intrinsically safe circuits and circuits that are not intrinsically safe.

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