Using LX3V-2TC2DA-BD can increase the two analog input points, two analog output points. If you use this module, it is being installed on the top of the PLC, so there is no need to change the installation area of the PLC.  The type to AD convert of LX3V-2TC2DA-BD is a thermocouple input type (K/J), and the converted digital value of each channel is stored in special registers, but the mode of analog-to-digital conversion cannot be changed.