Engine 2014: Electricity

1. A It receives an input from the control amplifier as well as the setpoint potentiometer and the output controls the reference anode current.  
2. B It receives an input from the control amplifier as well as the reference anode and the output controls the setpoint value.
3. C It receives an input from the setpoint value potentiometer as well as the reference anode and the output controls the protective anode current via the control amplifier.
4. D It receives an input from the setpoint potentiometer and the output controls both the reference anode current and the protective anode current.

Tip: press A-D to answer