Circuit for transmitting an electric current of an inherently safe to an inherently safe area sensor.

摘要

This circuit transmits a measurement current (1), WHICH IS DELIVERED FROM A sensor device (1) A Meas LOCATED IN AN AREA WITH OWN SAFETY (10), to an area free OWN SAFETY (20) THROUGH RESISTANCE current measurement (5) located in this area. At the same time supplied with energy SENSORY DEVICE FROM THE AREA WITHOUT OWN SAFETY THROUGH CONTINUOUS TENSION CONVERTER (3). THIS CONTAINS THE TRANSFORMER (2) SHOWING THE WINDING PRIMARY RETURNED TO THE AREA WITHOUT OWN SAFETY WITH TWO BOBINADOS PARTIAL (21, 22), equal and connected in series in the same direction and a single WINDING SECONDARY (23) facing AREA WITH OWN SAFETY. RESISTANCE CURRENT MEASUREMENTS (5) is located between the central connection of the output stage (31) CONTINUING TENSION CONVERTER (3) AND ZERO POINT CONNECTION (SN). THE CENTRAL CONNECTION HAS BEEN CONNECTED TO ENTRY STAGE SET OFFSET (6), whose output is connected to the converter input voltage to current (7). POWER SUPPLY (4) is located between UNION POINT OF PARTIAL BOBINADOS (21, 22) AND CIRCUIT GROUND ZERO.