INMBSMHI001R000 – Mitsubishi Heavy Industries FD and VRF to Modbus RTU Gateway

Mitsubishi Heavy Industries FD and VRF to Modbus RTU gateway – 1 indoor unit.

The INMBSMHI001R000 industrial gateway from Intesis (HMS Networks) enables fully bidirectional integration between Mitsubishi Heavy Industries FD and VRF air conditioning systems and Modbus RTU (RS-485 / EIA-485)-based building automation and industrial control systems. The device operates as a Modbus RTU server, exposing AC unit data directly to BMS, SCADA, PLCs, and HMI systems.

This interface provides complete control and monitoring of a single indoor unit, including operating states, alarms, and internal variables. An integrated running hours counter supports preventive maintenance and service planning, making the gateway suitable for long-term, professional HVAC deployments.

A key advantage of the INMBSMHI001R000 is the ability to control the AC unit simultaneously from both the manufacturer’s remote controller and the Modbus RTU system. This ensures full system-level integration without limiting local user operation or comfort.

The built-in window contact function allows energy-saving control strategies, such as reducing or stopping HVAC operation when a window is open. This function helps minimize energy consumption and operating costs, especially in offices, hotels, retail spaces, and public buildings.

Configuration can be performed using onboard DIP switches or directly via the Modbus RTU interface. The gateway does not require an external power supply, as it is powered directly from the AC unit, simplifying installation and reducing wiring. Mounting options include DIN rail or wall mounting, and in selected installations even placement inside the indoor unit.

Features and benefits:

• Modbus RTU (RS-485 / EIA-485) server device
• Bidirectional communication between Mitsubishi Heavy Industries FD/VRF and Modbus
• Control of 1 indoor unit
• Simultaneous control via manufacturer remote and Modbus RTU
• Window contact function for HVAC energy savings
• Running hours counter and error indication
• No external power supply required – powered from the AC unit
• Configuration via DIP switches and Modbus
• DIN rail or wall mounting

Technical specifications:

Communication interfaces:

• Modbus RTU: RS-485 / EIA-485
• HVAC port: dedicated Mitsubishi Heavy Industries communication port
• LED indicators: gateway and communication status
• Switches: DIP and rotary switches for RS-485 and gateway configuration

Power supply:

• Input voltage: 14 V DC
• Power consumption: 1.54 W
• Powered directly from the AC unit

Mechanical characteristics:

• Dimensions: 53 × 58 × 93 mm
• Weight: 95 g
• Housing: plastic
• Mounting: DIN rail (bracket included) or wall mount

Environmental conditions:

• Operating temperature: −25°C to +60°C
• Storage temperature: −40°C to +85°C

Certifications and warranty:

• CE, UL, CB, UKPSTI
• Warranty: 3 years

The INMBSMHI001R000 gateway is a reliable and compact solution for integrating Mitsubishi Heavy Industries HVAC systems with Modbus RTU-based building management systems, delivering stable communication, simplified installation, and energy-efficient operation.