The Trend IQ412 LAN Controller is ideal for replacing a faulty Trend IQ7x or IQ21x Controller but could also be used for any small BMS System, this controller has the feature of the LAN connections for connecting to the standard Trend 4 wire current loop system aswell as the Ethernet connection. This IQ412 Controller has 3 Universal Inputs, 2 Digital Inputs, 4 Triac Outputs and 2 Analogue Outputs. This controller is the 24V AC version.