FIELD: two-wire control circuits. SUBSTANCE: one claim of invention discloses device design which has detector for measuring a parameter of a process, measuring circuit, capacitance isolating circuit, which has rectifying gates, high- frequency filter, resistors. Another claim of invention discloses device design which has detector for measuring a parameter of a process, measuring circuit, energy isolating circuit, device housing, which is split by wall. Energy isolating circuit is located in first chamber of housing and contains rectifying gates, high-frequency filter and resistors. EFFECT: capacitance isolation between converter and control circuit, prevention of discharge to circuit, compatibility of converters independently from their inner effective capacitance. 13 cl, 6 dwg
