The FCU Controller (Fan Coil Unit) with Modbus Connectivity is a versatile and advanced control solution designed for efficient HVAC management. It features 18 built-in inputs and outputs, including 4 special inputs for voltage, resistance, and dry contact, and 4 digital inputs for dry contact. The controller supports 3 analogue outputs for 0-10V actuators and fan speed control, along with 3 relays for fan speeds, a 10A electric heater relay, and a 6A cooling actuator relay. Suitable for both 2-pipe and 4-pipe systems, it comes with a pre-loaded universal application and user-friendly configuration. Status LEDs provide a clear indication for all inputs, outputs, and communication, while the RS-485 connection operates as a Modbus RTU slave, with slave ID and baud rate easily configured via DIP switches.