Intrinsically safe automation field device

An intrinsically safe field device of automation technology for use in an explosion-hazard area, comprising:

• a first and a second connection terminal for connecting a two-wire line via which a current can be supplied;
• a sensor and/or actuator element for detecting and/or setting a process variable;
• and
• a field device electronic system that is connected to the first and second connection terminals and conducts the current, which can be supplied via the two-wire line, from the first to the second connection terminal via a current path,
• wherein the field device electronic system is designed to transmit process variables detected via the sensor element via the two-wire line and/or to receive a process variable to be set by the actuator element via the two-wire line, and/or to correspondingly set the actuator element, and
• wherein the field device electronic system includes:
• a low-resistance shunt resistor circuit with a shunt resistor and two diodes, wherein each of the two diodes is connected in parallel to the shunt resistor and wherein the diodes are wired into the current path in the flow direction;
• and
• a transducer circuit configured to read a voltage across the shunt resistor circuit via a voltage tap at the shunt resistor circuit.