Design of Communication Card Based on HART Protocol

A design scheme of communication card based on HART protocol was proposed for traditional meters without remote communication function, and circuit design of the communication card was introduced in details. A HART communication system was established by use of the communication card and tested on NCS4000 configuration software platform. The testing result showed that the communication card combined with a port card can reform a traditional meter into an intelligent meter which has functions of remote communication and control.