Modbus controllers THERMASREG® MBR 010, and MBR 011 are communicative controllers for temperature control of air conditioning units or climate control convectors (for devices with up to 3 ventilator steps, heating and cooling valves). These devices are equipped with a large well-readable display and are set by single-knob operation (press-turn-press). Temperatures and switching statuses are indicated on the display. They can either be operated stand-alone or in connection with a superior control device (SPS/DDC or Soft SPS), a building management system (RcWare Vision), a monitoring, control and data acquisition system, or a MBRWEB (a web browser interface), via the existing RS485 interface. Two device variants with differing features are available.