IN770AIRXXSO000 – multi-brand AC gateway for VRF systems with KNX, Modbus and BACnet, 4 units

Intesis multi-brand AC SMALL gateway for VRF systems (Samsung, Daikin, Hitachi, York, Hisense, LG, Toshiba, Midea) with KNX, Modbus and BACnet. 

IN770AIRXXSO000 is an industrial communication gateway from the Intesis 700 Air Gateway line, version multi-brand AC SMALL. It is designed for integration of VRF indoor and outdoor units from multiple leading HVAC manufacturers with KNX, Modbus TCP/RTU, BACnet/IP or BACnet MS/TP systems. The gateway supports brands such as Samsung, Daikin, Hisense, Hitachi, York, LG, Toshiba, Midea, Mitsubishi Electric, Panasonic and others, offering a unified interface between HVAC systems and building automation platforms. In the SMALL version, the gateway supports up to 4 indoor units, making it ideal for small commercial facilities, hotel rooms, apartments, office zones and compact VRF installations.

IN770AIRXXSO000 – why it matters in real projects
In retrofit and multi-tenant buildings, HVAC zones are often built around different VRF brands. This gateway lets you standardize BMS integration while keeping native VRF performance: the same BMS objects and supervisory logic can be applied regardless of whether the zone uses Samsung, Daikin, Hitachi, Hisense, Toshiba or Midea. In the SMALL capacity tier, you get a compact footprint and a predictable “up to 4 indoor units” scope, which is ideal for room-based or small-zone deployments where commissioning speed and repeatability are critical.

A key functional aspect of this device is that it works as a Central Controller on the native AC communication bus. Since VRF communication lines allow only one Central Controller to be present, the IN770AIRXXSO000 must operate as the sole controller. If the installation requires parallel operation with another Central Controller, an XYE Extension Kit is required to ensure compatibility and prevent bus conflicts.

Central Controller topology – what it means for commissioning and stability
Operating as the single Central Controller is a key reason why the gateway can deliver reliable bidirectional communication. In practice, it reduces the risk of conflicting commands and inconsistent status feedback that may appear when more than one “master” tries to control the same VRF bus. For BMS integrators, this translates into cleaner trend logs, fewer intermittent alarms caused by bus contention, and predictable behavior of setpoints/modes across supervisory schedules.

The gateway automatically adapts communication functions depending on the connected AC brand. Brand-specific limits apply, including the number of supported indoor units, outdoor units, and communication terminals. This flexibility makes the bridge a universal and scalable integration tool for BMS, SCADA and PLC systems.

Brand-specific capacities & bus connections

• Bosch: up to 4 indoor units — connected via XYE terminals
• Daikin: up to 4 indoor units and 4 outdoor units — connected via F1/F2 terminals
• Hisense: up to 4 indoor units and 4 outdoor units — connected via AB (H-Link)
• Hitachi: up to 4 indoor units and 4 outdoor units — connected via AB (H-Link)
• Midea: up to 4 indoor units — connected via XYE terminals
• Mitsubishi Electric: up to 15 groups — connected via Mitsubishi Electric Centralized Controller
• Panasonic: up to 4 indoor units and 4 outdoor units — connected via U1/U2 (P-Link)
• Samsung: up to 4 indoor units and 4 outdoor units — connected via R1/R2 terminals

This gateway supports bidirectional communication between VRF units and BMS platforms. It exposes all key parameters such as operation mode, fan speed, setpoint temperature, room temperature, alarms, louver position and status values. Integration via KNX, BACnet or Modbus enables unified HVAC control across building management or smart home ecosystems.

Standardized data points for BMS/SCADA
When you abstract brand-specific VRF variables into KNX / Modbus / BACnet points, you can build consistent operator graphics, alarms and schedules across multiple sites. This is especially valuable for facility teams who want one set of rules for occupancy-based operation, setback temperatures, and “hotel room logic” (card-holder input, window contact, presence sensor), regardless of the VRF manufacturer installed in each room or zone.

The IN770AIRXXSO000 gateway is equipped with Ethernet 10/100 Mbps, EIA-485, KNX TP and USB-C ports. It includes three binary inputs for external dry-contact integration such as window sensors, card-holder switches or alarm triggers. The device is configured using Intesis MAPS, featuring auto-discovery, point mapping, diagnostics and the Late Configuration feature, allowing protocol changes even after installation.

Binary inputs as “project accelerators”
The three dry-contact inputs allow you to bring room-level signals directly into the same integration node that exposes VRF points. In practice, this can simplify wiring to the BMS panel and speed up commissioning of typical energy-saving sequences (e.g., disable cooling when the window is open, switch to Eco when the card-holder is removed, force a safety mode on alarm input).

The gateway includes 14 LED indicators for diagnostics and two DIP-switch blocks for RS-485 termination and bus polarization. It provides 1000 VDC galvanic isolation between communication ports, ensuring stability and electrical protection. The housing measures 90 × 106 × 58 mm, made of PC UL94 V-0, suitable for DIN rail EN60715 TH35 or wall mounting.

Product features

Main features

• Multi-brand VRF integration: Samsung, Daikin, Hisense, Hitachi, LG, Toshiba, Midea, Bosch, Panasonic, Mitsubishi Electric and others
• Protocols: KNX TP, Modbus TCP/RTU, BACnet/IP, BACnet MS/TP
• SMALL version – controls up to 4 indoor units or 15 groups for Mitsubishi Electric
• Central Controller operation – requires XYE Extension Kit for multi-controller systems
• Bidirectional communication – full control and monitoring
• Auto-discovery for fast commissioning
• Late Configuration – change protocol after installation
• Configuration & diagnostics through Intesis MAPS
• 14 LEDs and 2 DIP-switch blocks
• 3 binary inputs for dry contacts
• 1000 VDC galvanic isolation between ports
• PC UL94 V-0 enclosure, DIN rail or wall mounting
• Compliance with CE, RoHS, WEEE
• Manufacturer warranty: 36 months

Technical specifications

Technical specifications

Communication ports

• Ethernet: 1 × RJ45 10/100 Mbps (Modbus TCP, BACnet/IP)
• RS-485: 1 × 3-pin terminal (Modbus RTU, BACnet MS/TP)
• KNX: 1 × 2-pin connector (KNX TP)
• USB-C: configuration port (Intesis MAPS)
• Binary inputs: 3 × dry contact inputs

Power supply

• Voltage: 12–36 VDC ±10% or 24 VAC ±10% (50–60 Hz)
• Consumption: max. 250 mA (DC) / 127 mA (AC)
• Isolation: 1000 VDC between communication ports

LED indicators & DIP switches

• 14 LEDs (power, error, TX/RX, bus activity)
• 2 DIP-switch blocks for RS-485 termination & bus polarization

Enclosure & mounting

• Material: PC UL94 V-0 (light grey, RAL 7035)
• Dimensions: 90 × 106 × 58 mm
• Weight: 205 g (330 g with packaging)
• Protection rating: IP20
• Mounting: DIN rail EN60715 TH35 or wall-mounted

Environmental conditions

• Operating temperature: 0…60 °C
• Storage temperature: -30…+60 °C
• Humidity: 5–95% RH (non-condensing)

Warranty & certifications

• Warranty: 36 months
• Certifications: CE, RoHS, WEEE
• Manufactured in: Spain
• HS Code: 8517620000

Need a quick compatibility check (brand + VRF bus type) and a clean point list for KNX/Modbus/BACnet mapping? Contact our specialists here.