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UBM-180 Universal Bus Modem

Connect Virtually Any Host to Virtually Any Field Instrument


The UBM-180 Universal Bus Modem is a versatile and fully TRL/2-compatible communication interface designed to simplify connectivity in tank gauging and industrial automation systems. Supporting the globally recognized Emerson-Rosemount® TRL/2 fieldbus standard, the UBM-180 seamlessly bridges RS232/RS485 Modbus® RTU communication with TRL/2 fieldbus networks — in both directions.

Engineered for flexibility and scalability, the UBM-180 enables reliable integration between host systems, control applications, and field instruments. Multiple UBM-180 units can be combined to create advanced communication architectures, while front-panel LED indicators provide instant diagnostics of communication activity and TRL/2 signal quality.

As part of Exalon Delft’s innovative product portfolio, the UBM-180 delivers a robust and future-ready solution for expanding and optimizing tank gauging communication infrastructures.

Ready to Connect

The UBM-180 simplifies communication between host systems and field instruments by acting as a powerful protocol bridge. Whether connecting legacy equipment, expanding an existing TRL/2 network, or integrating third-party field devices, the UBM-180 provides the flexibility needed for modern tank gauging applications.

Its intuitive diagnostic LEDs offer real-time insight into network status and communication performance, helping operators quickly identify and resolve issues while maintaining maximum system uptime.

Expanding the Potential of the TRL/2 Fieldbus

The Emerson-Rosemount® TRL/2 fieldbus is a proven communication standard for tank gauging systems, supporting up to eight field instruments per trunk line over distances of up to 4 kilometers.

The UBM-180 significantly extends these capabilities by enabling multiple applications to share the same TRL/2 network. Tank Management Systems and Control Applications can operate simultaneously on a single fieldbus, maximizing infrastructure utilization while reducing installation costs.

Its repeater functionality allows additional field instruments to be connected, while transparent Modbus message handling enables seamless integration of Modbus RTU, 4–20 mA, and HART devices into both Control and Tank Management environments.

The result is a highly flexible, scalable, and cost-effective communication platform that grows with your operational requirements./p>

Key Features

  • Seamless conversion between RS232/RS485 Modbus® RTU communication and Emerson-Rosemount® TRL/2 fieldbus.
  • Support for multiple host systems sharing a single TRL/2 fieldbus, including PLC applications with remote Modbus slave I/O.
  • Flexible port assignment, allowing host and field interfaces to be configured as RS232, RS485, or TRL/2 fieldbus.
  • Extension of TRL/2 networks through Ethernet or fiber optic communication segments.
  • Integration of Modbus RTU, 4–20 mA, and HART field instruments into the Emerson-Rosemount® 2460 System Hub.
  • Built-in TRL/2 fieldbus monitoring and diagnostics for rapid fault localization.
  • Fast response times through intelligent data caching.
  • Easy commissioning via local terminal connection or remote item requests.
  • Scalable architecture for expanding communication networks and field device integration.

Typical Applications

  • Tank Management Systems
  • Process Control Applications
  • Migration and modernization projects
  • Migration and modernization projects
  • TRL/2 fieldbus diagnostics and troubleshooting
  • Remote Modbus RTU slave integration