The P632 is equipped with an open-circuit monitoring function. If current IDC falls below the set threshold MEASI: IDC< open circuit, the signal MEASI: Open circ. 20mA inp. is issued.

The input current is monitored in order to protect the 20 mA analog input against overloading. If it exceeds the set threshold of 24.8 mA, the signal MEASI: Overload 20mA input is issued.