GW-BAC1 Unitronics BACnet to Modbus Gateway

Why Choose the Unitronics GW-BAC1 BACnet Gateway?

The Unitronics GW-BAC1 is a high-performance BACnet to Modbus gateway designed to integrate Unitronics PLCs with modern Building Management Systems (BMS) and Building Automation Systems (BAS). It enables seamless communication between Unitronics controllers and networks using BACnet MS/TP, BACnet/IP and Modbus TCP protocols, making it ideal for HVAC, energy management and building automation applications.

Designed specifically for Unitronics automation platforms, the GW-BAC1 acts as a communication bridge between PLCs and BACnet devices. Using the UniBACnet Configurator software, engineers can quickly create configuration files and establish reliable communications between controllers and BACnet-based systems.

Its compact industrial design, broad protocol support and BTL-certified BACnet implementation make the GW-BAC1 an excellent solution for integrating industrial control systems into commercial building automation environments.

Key Advantages

• Provides seamless integration between Unitronics PLCs and BACnet systems.
• Supports BACnet MS/TP, BACnet/IP and Modbus TCP protocols.
• Ideal for building automation and energy management applications.
• BTL-certified BACnet implementation.
• Simple configuration using UniBACnet Configurator software.
• Supports both Ethernet and RS-485 communication networks.
• Industrial-grade design for reliable long-term operation.

Key Features

• Unitronics GW-BAC1 BACnet Gateway.
• BACnet MS/TP communication support.
• BACnet/IP communication support.
• Modbus TCP communication support.
• Modbus RS-485 interface to Unitronics PLCs.
• Ethernet connectivity via RJ45 port.
• Integrated LED diagnostic indicators.
• BTL-certified BACnet functionality.
• Configuration via UniBACnet Configurator software.

Technical Specifications

• Manufacturer: Unitronics
• Model: GW-BAC1
• Product type: BACnet to Modbus Gateway
• Supported protocols: BACnet MS/TP, BACnet/IP, Modbus TCP
• PLC interface: Modbus RS-485
• Ethernet port: 1 × RJ45
• Serial ports: BACnet MS/TP and Modbus RS-485
• Supply voltage: 9-30 V DC or 12-24 V AC
• Nominal supply voltage: 12 V DC / 24 V DC
• Operating temperature: -40°C to +75°C
• Dimensions (H × W × D): Approx. 41 × 83 × 115 mm
• Weight: Approx. 0.2 kg
• Certifications: BTL, CE, UL, FCC, RoHS

Connect PLC Systems to Building Automation Networks

The GW-BAC1 enables Unitronics PLCs to communicate directly with BACnet-enabled building management systems. This allows automation engineers to integrate HVAC equipment, pumps, energy monitoring systems and other building services into centralised building automation platforms.

By translating communications between Modbus-based Unitronics controllers and BACnet networks, the gateway simplifies system integration whilst maintaining reliable data exchange across multiple building automation protocols.

Typical Applications

• Building Management Systems (BMS).
• Building Automation Systems (BAS).
• HVAC control systems.
• Energy management and monitoring.
• Commercial building automation.
• Industrial facility management.
• Pump and ventilation control systems.
• Smart building infrastructure.

Trusted by Building Automation Professionals

Unitronics BACnet gateways are widely used by automation engineers and system integrators to connect industrial PLC systems with modern building management and automation platforms, enabling reliable communication across multiple protocols.