Fujitsu RAC and VRF systems to Modbus RTU Interface (to CN connector). The Fujitsu-Modbus gateway INMBSFGL001I000 allows fully bi-directional communication between Fujitsu RAC and VRF systems and Modbus RTU (RS-485) networks. The INMBSFGL001I000 is wired directly to an indoor unit. This allows not only the control of the main AC functions such as operating mode, fan speed, temperature setpoint…but the monitoring of errors, alarms and some interna..