TAC Xenta 300 is a group of freely programmable controllers with integral LonWorks communication, designed for smaller and medium-sized installations. TAC Xenta 300 has complete heating and ventilation functionality including control loops, curves, timer controls, alarm management, etc.There are two models of TAC Xenta 300 with different configurations of input and ouput signals. The capacity of TAC Xenta 300 can be using up to two expansion modules which are connected to the LonWorks network and can therefore be situated in a separate location from the controller.