Overview
The EGI VRF Adapter provides seamless integration between VRF HVAC systems and smart home or building management systems (BMS). Available in two versions—Tuya ZigBee or Modbus RTU (RS-485)—this adapter enables centralized control, automation, and monitoring of up to 32 indoor units (IDUs).
Versions
- Tuya ZigBee Version:
- Wireless ZigBee 3.0 communication
- Compatible with Tuya Smart and Smart Life apps
- Easily integrates with Home Assistant via Tuya integration
- Modbus RTU Version:
- RS-485 wired interface
- Native Modbus RTU support
- Integrates directly with BMS, KNX systems (via gateway), and Home Assistant Modbus integration
Applications
- Residential smart homes
- Commercial building management
- Hospitality and healthcare facilities
- Industrial environmental control
Integration & Compatibility
| Home Assistant | KNX Integration | BSwitch (SwitcBee) Integration |
| Native integration via Modbus | Compatible via standard Modbus RTU-to-KNX gateways. | Direct RS-485 wired communication. Can share the same power supply with CoolSwitch (12V DC). Simple two-wire RS-485 connection (A to A, B to B). |
| Cloud integration via Tuya | ||
| Direct ZigBee integration (ZigBee2MQTT/ZHA) (under development) |
Certifications & Compliance
| Region | Certificate | Directives and compliances |
| European Union (EU) | CE Mark Radio Equipment Directive (RED, 2014/53/EU) | RF: EN 300 328 (2.4 GHz) EN 301 893 (5 GHz) |
| EMC: EN 301 489-1 EN 301 489-17 | ||
| Safety: EN 62368-1 | ||
| RF Exposure: EN 62479 / EN 62311 | ||
| RoHS Compliance | Directive 2011/65/EU | |
| WEEE Directive
| 2012/19/EU | |
| USA (Optional, upon request) | FCC Certification | FCC Part 15C (2.4 GHz) and FCC Part 15E (5 GHz) |
| UL/ETL Safety Certification | UL 62368-1 (optional) | |
| California Proposition 65 | Compliance (optional) | |
| Israel | Ministry of Communications (MoC) | Full certification and explicit report formats compliant with MoC standards |
| IIS | Approval compliant with Israeli standards |
Technical Specifications
| General | |
| Operating Voltage | 12-30 VDC (Typical 12VDC, 2W) |
| Communication Interfaces | ZigBee 3.0 (Tuya Version) RS-485 Modbus RTU (Modbus Version) |
| Installation | DIN Rail mountable |
| Operating Temperature | -10°C to 60°C |
| Storage Temperature | -20°C to 70°C |
| Relative Humidity | 10%-90% (Non-condensing) |
| RS-485 Communication (Modbus Version Only) | |
| Baud Rate | 9600 bps |
| Data Bits | 8 |
| Parity | Even |
| Stop Bits | 1 |
| Slave ID | 1 |
| ZigBee Communication (Tuya Version Only) | |
| Protocol | ZigBee 3.0 |
| Frequency | 2.4 GHz |
| Range | Typically 30-50 meters (indoor) |
| Gateway Compatibility | Any standard Tuya ZigBee gateway |
| Inputs & Outputs | |
| Modbus RTU | A/B Terminals (RS-485) |
| VRF System Connection | Terminals for VRF communication bus |
| Power Supply | DC Input terminal (12-30VDC) |
| Physical Dimensions | |
| Dimensions (WxHxD) | 106mm x 90mm x 58mm |
| Weight | Approx. 220 grams |
| Mounting | Standard DIN Rail (35mm) |
| IP Rating | IP20 (For Indoor use only) |
Supported VRF Brands
Brand | Adapter Port | VRF Port | Polarity Required | Connection on ODU | Centralized Control Address |
| Daikin (Multiple ODUs) | F1, F2 | F1, F2 (external-external) | No | Yes | Yes |
| Daikin (Single ODU) | F1, F2 | F1, F2 (internal-external) | No | No | Yes |
| Mitsubishi (Multiple ODUs) | F1, F2 | M1, M2 (TB7) | No | Yes | No |
| Mitsubishi (Single ODU) | F1, F2 | M1, M2 (TB3) | No | No | No |
| Mitsubishi (Rhombus) | F1, F2 | M1, M2 (external/Split box) | No | No | No |
| Hitachi | F1, F2 | 1, 2 | No | No | No |
| Toshiba | F1, F2 | U1, U2 | No | No | Yes |
| Panasonic | F1, F2 | U1, U2 | No | No | No |
| Hisense | F1, F2 | 1, 2 | No | No | No |
| Haier | F1, F2 | P, Q | No | No | No |
| York Qingdao | F1, F2 | 1, 2 | No | No | No |
| York Guangzhou | X, Y | A2, B2 | Yes | Yes | No |
| GREE | H, L | G1, G2 | Yes | Yes | No |
| TCL | H, L | F1, F2 | Yes | No | No |
| Mitsubishi Heavy Industries | X, Y | A1, B1 or A2, B2 | No | No | No |
| Midea, Bosch, Carrier | X, Y | X, Y or P, Q | Yes | Yes | No |
| AUX | X, Y | A, B | Yes | No | No |
| Samsung | X, Y | F1, F2 | No | No | No |
| LG | X, Y | A, B (CEN) | Yes | No | No |
| Macwell | X, Y | Apc, Bpc | Yes | Yes | No |
| TICA | X, Y | A3, B3 | Yes | No | No |
| Chigo | X, Y | P, Q | Yes | No | No |
| Trane | X, Y | A, B | Yes | Yes | No |