Switching quantity output self-protection circuit

The utility model discloses a switching quantity output self-protection circuit, and relates to the technical field of industrial control, for solving the technical problem of inconvenient system maintenance. The circuit comprises an output relay, a Hall current sensor, an AND gate, and an output driving module for driving the output relay to be open and closed, wherein the driving signal output end of the output driving module is connected with the control end of the output relay, and the primary output end of the Hall current sensor is connected with one static contact of the output relay; and one input end of the AND gate is connected with the secondary voltage output end of the Hall current sensor, the other input end is connected with a switching quantity signal source, and the output end of the AND gate is connected with the source signal input end of the output driving module. The switching quantity output self-protection circuit provided by the utility model is especially suitable for the switching quantity output module of an FPGA-based digitalization control platform.