Analog quantity input module with disconnect-type HART function board

The invention relates to an analog quantity input module with a disconnect-type HART function board. The analog quantity input module is characterized by comprising the pluggable HART function board. The HART function board comprises an optoelectronic isolation unit I, a signal receiving unit, a signal sending unit and a communication conversion unit. The input end of the signal receiving unit is connected with the optoelectronic isolation unit I, the output end of the signal receiving unit is connected with the communication conversion unit, the output end of the signal sending unit is connected with the optoelectronic isolation unit I, the input end of the signal sending unit is connected with the communication conversion unit, the optoelectronic isolation unit I and a data collecting assembly share an HART protocol carrier signal input end and an HART protocol carrier signal output end, and the communication conversion unit is connected with a microprocessor and a communication assembly. The analog quantity input module has the advantages that through the mode of arranging the HART function board in a universal analog quantity input module of an industrial process control system, the universal analog quantity input module is converted into the special HART protocol analog quantity input module, and therefore convenience and flexibility are achieved.