S311G is a digital indicator with analog input and voltage / current generator. There are 2 different operating modes. In automatic mode S311G measures an analog value and retransmits it to the output. In manual mode a setpoint is turned into a generated value by the output. In manual mode and switching from automatic to manual mode (or vice versa) it is available a signal attenuation feature (antibumper) in order to avoid actuator hammer or dangerous voltage / current surges. S311G is a digital indicator with universal input including voltage, current and potentiometer.