FIELD: electricity.
SUBSTANCE: device (12) of process control is configured for connection to double-wire circuit (18) of process control. Circuit (60) of process control is configured to apply outlet current to double-wire circuit (18) of process control. Circuit (64) of circuit current verification is connected to double-wire circuit (18) of process control and configured to detect errors in applied outlet current. At least part of circuit (64) of circuit current verification is independent on circuit (60) of circuit current withdrawal.
EFFECT: improved accuracy of process control.
22 cl, 16 dwg
