Modbus remains a popular network interface and is commonly found on jobs such as boiler control, variable speed drives, and metering applications, but these devices lack BACnet compliance. To make Modbus devices appear as individual BACnet devices, a BASgatewaySX is used. The BASgatewaySX has one 10/100 Mbps Ethernet port for Modbus TCP and BACnet/IP and an opto-isolated Modbus EIA-485 serial port for Modbus RTU or Modbus ASCII devices.

Up to 200 Modbus serial devices represented by up to 2,000 polled points can share the single Modbus EIA-485 port on the BASgatewaySX. BACnet COV notification is supported on 200 points (100 Analog and 100 Binary points). The virtual routing feature in the BASgatewaySX allows each connected Modbus device to appear as an individual BACnet compliant device.

A device profile is needed for each Modbus type device. Contemporary Controls maintains a library of freely-available device profiles available for download. If the device profile is not available, Contemporary Controls will provide it upon request. Custom Modbus device profiles can also be uploaded to the BASgatewaySX using a web page.

Using HTTPS webpages and a resident database of common Modbus device profiles, Modbus data points from Modbus Serial or Modbus TCP devices can be mapped to BACnet objects.

Product Details

Gateway Functionality Between...

• Modbus Serial (RTU or ASCII) and BACnet/IP
• Modbus TCP and BACnet/IP

Convenient Installation

• 24 VAC/VDC powered
• DIN-rail mount (BASGSX-M1) or panel mount (BASGSX-M1/P)

Routing Functionality Between...

• Modbus Serial (RTU and ASCII) and Modbus TCP

Flexible Communication Ports

• 10/100 Mbps Ethernet with auto-negotiation and Auto-MDIX
• Opto-isolated serial port supports either 2-wire or 3-wire EIA-485
• Jumper-selectable EIA-485 bias and termination
• Baud rates from 2.4-115.2 kbps

The BASgatewaySX is housed in a metal case available as 35-mm DIN-rail mount (BASGSX-M1) or Panel mount (BASGSX-M1/P) model. Powered from a 24 VAC/VDC (± 10%) source, its half-wave rectified power supply allows sharing of power with other half-wave devices.

The optically-isolated serial port allows for connection to either 2-wire or 3-wire EIA-485 networks using a removable 5-pin terminal block. Up to 200 EIA-485 Modbus serial devices represented by up to 2,000 polled points can share the serial bus at data rates between 2.4 and 115.2 kbps. External DIP switches allow flexible bias and termination options. They can be removed for mid-span installations.

The Ethernet port offers a shielded RJ-45 connector. Through auto-negotiation and Auto-MDIX, it automatically matches connections to the attached equipment. Therefore, either CAT5 straight-through or crossover cable can be used to attach to the BACnet/IP or Modbus TCP network at either 10 or 100 Mbps speed.

A resident web server allows for commissioning, and troubleshooting via a standard web browser. A reset switch is provided for returning to the factory default IP address. LED indicators provide communication status on both the Ethernet and serial ports.

Integrate your EnOcean wireless devices to BACnet systems with the Contemporary Controls’ bidirectional EnOcean to BACnet Gateway. EnOcean wireless energy-harvesting devices are freely-positionable, self-powered, and suitable for retrofits and newly constructed buildings. EnOcean technology provides high flexibility through ease of use and installation. Devices are upgradable, expandable, and flexible to relocate at any time. The EnOcean to BACnet Gateway provides the system integrator with a flexible building block when integrating EnOcean wireless devices to BACnet/IP networks or expanding the number of EnOcean points in an existing building automation system. Thanks to virtual routing technology, our gateway seamlessly discovers and connects to EnOcean devices and makes them appear as individual BACnet-compliant devices. EnOcean Equipment Profiles (EEP) are built-in for easy integration to BACnet systems. The EnOcean to BACnet Gateway provides the ultimate in flexibility. It features EnOcean device discovery with built-in EEP and web-page configuration using a common web browser. There are no external tools required for configuration. This allows EnOcean devices to be easily combined with BACnet devices and supervisors into one automation system. Using remote commissioning the gateway can configure EnOcean output devices to be controlled by specific input devices. This can save you from the manual linking that requires repeatedly pressing buttons on the EnOcean devices until they are linked and can make installation of EnOcean devices much easier. The EnOcean to BACnet Gateway can be DIN rail or panel mounted requiring one 10/100 Mbps Ethernet connection, and 24VAC/VDC power. Its half-wave rectified power supply allows sharing of power with other half-wave devices.

Versatile Gateway and Control Device

• Bidirectional gateway functionality between EnOcean Wireless and BACnet/IP
• EnOcean device discovery
• Remote commissioning of link tables and configuration settings
• Each EnOcean device appears as virtual BACnet device to aid in integration
• Built-in EnOcean Device Profiles for seamless integration
• Webpage configuration—no external tools or software required
• Webpage-based remote commissioning of EnOcean devices

Convenient Installation

• 10/100 Mbps Ethernet with auto-negotiation and Auto-MDIX
• 24 VAC/VDC powered • DIN-rail or panel mounting
• EnOcean SMA connector provides flexible antenna options