Product Overview

The ABB 3BDH000320R02, also known as the LD800HSE, is a high-performance Foundation Fieldbus linking device engineered by ABB for the Advant 800xA and Freelance distributed control systems (DCS). This intelligent gateway serves as a critical bridge between the High Speed Ethernet (HSE) subnet and up to four independent H1 fieldbus links, enabling seamless integration of Foundation Fieldbus field devices into the supervisory and control architecture . The ABB 3BDH000320R02 LD800HSE allows operators and engineers to access function blocks, process data, and diagnostic information from connected H1 devices directly from the system-level host, providing a transparent and efficient communication pathway across the entire plant network .

Positioned as a key infrastructure component in ABB’s fieldbus ecosystem, the ABB 3BDH000320R02 LD800HSE is designed to meet the rigorous demands of continuous process industries. It operates as a class 42c HSE profile device per the Fieldbus Foundation specification, with each H1 port functioning as an independent Link Master with a built-in Link Active Scheduler (LAS) . This architecture empowers the ABB 3BDH000320R02 LD800HSE to manage publisher/subscriber communication, redistribute process data between H1 links and to the HSE network, and distribute alarms and events from field devices. The device’s support for redundancy, where two ABB 3BDH000320R02 LD800HSE units can be paired via a serial redundancy link, ensures automatic failover and high system availability, making it the cornerstone of reliable and future-ready industrial automation networks .

Technical Specifications

Main Features and Advantages

High-Speed Gateway with Advanced Fieldbus Management: At the core of the ABB 3BDH000320R02 LD800HSE is its ability to act as a high-speed gateway between the 100 Mbps HSE backbone and the 31.25 kbps H1 fieldbus segments. Its four fully independent H1 channels each operate as a Link Master with a Link Active Scheduler (LAS), autonomously managing the publisher/subscriber communication on that segment . The ABB 3BDH000320R02 LD800HSE supports configuration of connected devices from the host system via the CFH capability file, enabling true plug-and-play commissioning . This removes the complexity traditionally associated with integrating Foundation Fieldbus into a DCS, allowing the ABB 3BDH000320R02 LD800HSE to dramatically simplify network engineering while maintaining deterministic control over field devices.

High Availability Through Intelligent Redundancy: The ABB 3BDH000320R02 LD800HSE is engineered for continuous operation in mission-critical environments. It supports a robust redundancy scheme where two devices are connected to the same H1 links, with one serving as the primary and the other as a hot-standing secondary . A dedicated serial link between the primary and secondary ABB 3BDH000320R02 LD800HSE units ensures continuous communication and monitoring, facilitating automatic and seamless failover with minimal impact on the process. This high-availability feature is essential for processes such as continuous chemical reactions or power generation, where an unplanned loss of communication to field devices could lead to costly shutdowns or safety incidents .

Transparent Data Access and Advanced Diagnostics: The ABB 3BDH000320R02 LD800HSE provides transparent access to all function blocks and parameters in the connected H1 devices from the 800xA system. It supports client/server communication for on-demand parameter access and reports alarms and events directly from the H1 devices to the host . The device also features a built-in web server (from System 800xA 6.0 onwards) for status monitoring and diagnostic information . This capability allows maintenance personnel to identify and troubleshoot issues on the fieldbus network without the need for specialized handheld communicators, significantly reducing maintenance time and costs.