EIM..M series of analog I/O expansion module is a remote control unit follows the format of MODBUS RTU communication rule, the main purposes is increasing I/O points for AIRTEK DDC.It works with any controller which has an EIMnet port. EIM..Muses 32-bit microprocessor core, transmission rate up to 38,400 bps. Theirs analog input points have 12-bit resolution which provides high accuracy reading value. Theirs analog output points also have 12-bit resolution which can make a precise control. The physical points of EIM can be directly converted to DDC's AI / AO points. Therefore, setting or transfer of these I/O points is not required. The controller can use these points directly. EIM..Mmakes the arrangement of control points flexible, save money, and helps to control all related control points in a single program.It is absolutely the best product for your building.