Modbus communication modules for Fujitsu air conditioners

Modbus communication modules for Fujitsu air conditioners

This category includes Fujitsu Modbus communication modules designed to connect residential, RAC and VRF air conditioners to central building management systems (BMS) or SCADA using the Modbus RTU protocol over RS-485. These modules enable full remote control of air conditioning units, including temperature setting, operating mode selection, fan speed adjustment, and diagnostics. By integrating your air conditioning with a Modbus-based BMS, you gain better energy efficiency, reduce maintenance time, and extend the lifespan of the devices.

The modules are fully compatible with a wide range of indoor units from Fujitsu and other OEM brands. For detailed compatibility, refer to the official documentation: COMPATIBILITY LIST, COMPATIBILITY LIST 2.

Fujitsu Modbus communication module features and functions

Each communication module can handle either a single indoor residential unit or up to 16 RAC or VRF units in grouped mode. While the VRF and RAC gateways allow multiple devices to be connected simultaneously, they function as a group—individual control of each air conditioner is not possible in this configuration. Therefore, the most common and recommended setup is a 1:1 configuration, especially where individual control and feedback are required.

The modules support serial communication over Modbus RTU via RS-485, making it possible to connect up to 63 units into a single network. This allows centralized management of air conditioning systems in large buildings, hotels, or office complexes. Module addressing and configuration can be done either via DIP-switches or by using the Modbus RTU protocol, which provides flexibility during installation and commissioning.

Each gateway is designed with built-in electrical isolation of 1500 VDC for safe and reliable operation, especially in environments with sensitive electronics. Modules can be mounted directly on a wall or snapped onto a DIN rail (TH35) for seamless integration in control cabinets. They are internally powered and support simultaneous use with an IR remote control, allowing dual-mode control for maximum convenience.

Fujitsu Modbus communication modules are ideal for system integrators, facility managers, and automation professionals seeking a robust solution for HVAC integration. Whether you're upgrading an existing system or planning a new smart building installation, these gateways provide a stable interface between Fujitsu air conditioning units and industrial Modbus infrastructure.

If you have any questions regarding the compatibility of your specific indoor unit, our product specialist is available to assist with selection and confirmation of technical details – contact an expert.

Select the Fujitsu Modbus module that fits your system and explore the full technical specifications and documentation to ensure seamless integration with your automation platform.