GW-2439M
Introduction
The GW-2439M is a powerful network gateway that supports three communication roles: BACnet/IP Client, Modbus TCP Server, and Modbus RTU Slave. It acts as a bridge between BACnet and Modbus systems, allowing a host system to read and write data from remote BACnet/IP Servers via either a Modbus TCP Client or Modbus RTU Master. The GW-2439M can communicate with multiple BACnet/IP Servers in real-time, enabling data integration and centralized monitoring.
As a BACnet/IP Client, the GW-2439M actively initiates communication requests to access various types of objects from BACnet Servers, including:
- Analog objects: AI (Analog Input), AO (Analog Output), AV (Analog Value)
- Binary objects: BI (Binary Input), BO (Binary Output), BV (Binary Value)
- Multi-state objects: MSI (Multi-state Input), MSO (Multi-state Output), MSV (Multi-state Value)
The present_value of all these BACnet objects can be mapped and converted into Modbus registers, allowing Modbus-based host systems to access BACnet data through standard Modbus communication protocols. This significantly enhances flexibility and efficiency in system integration.
The GW-2439M supports up to 9,000 BACnet object mappings and complies with various BACnet Interoperability Building Blocks (BIBBs), including:
- DS-RP-A: Read Property
- DS-RPM-A: Read Property Multiple
- DS-WP-A: Write Property
- DS-WPM-A: Write Property Multiple
- DM-DDB-A: Dynamic Device Binding
- DM-DOB-A: Device Object Binding
- DM-DCC-A: Device Communication Control
- DM-RD-A: Reinitialize Device
In addition, with the dedicated configuration utility, users can easily:
- Automatically scan for BACnet Servers and their objects
- Configure object mapping parameters
- Automatically generate Modbus mapping tables
- Import/export configuration files to improve deployment efficiency
These features make the GW-2439M an ideal BACnet-to-Modbus gateway solution for smart buildings, automation systems, and BEMS/SCADA integration applications.
Applications
- Building Automation
- Heating, Ventilating, and Air-conditioning Control
- Lighting Control
- Access Control

Ordering Information
| PRODUCT SERIES | DESCRIPTION | QNT. | INQUIRY |
|---|---|---|---|
This combination include other products.
Similar Products
| LED Indicators | |
|---|---|
| Status | Power (1), BACnet/IP Status (1), BACnet/IP Net(1), Modbus TCP TxD/RxD/Link (3) Ethernet LED Ethernet Status (RJ-45) (2) |
| Ethernet | |
|---|---|
| Ports | 1 x RJ-45, 10/100Base-TX |
| Protocol | Modbus TCP Server and Modbus RTU Slave(up to 2 TCP connections) |
| BACnet/IP | |
|---|---|
| Protocol | BACnet/IP Client (Supports up to 10 BACnet/IP Servers) |
| Objects | AI, AO, AV, BI, BO, BV, MSI, MSO, MSV(Supports up to 9000 BACnet objects' present value) |
| BIBBs | DS-RP-A, DS-RPM-A, DS-WP-A, DS-WPM-A, DM-DDB-A, DM-DOB-A, DM-DCC-A, DM-RD-A |
| Power | |
|---|---|
| Input Range | +10 ~ +30 VDC |
| Consumption | 5 W @ 24 VDC |
| Mechanical | |
|---|---|
| Casing | Metal |
| Dimensions (mm) | 33 x 120 x 116 |
| Installation | DIN-Rail |
| Environment | |
|---|---|
| Operating Temperature | -25 ~ +75 °C |
| Storage Temperature | -30 ~ +80 °C |
| Humidity | 10 ~ 90% RH, Non-condensing |










