Industry Trends in Ethernet-Based I/O Systems
Modern industrial automation increasingly relies on Ethernet networking to streamline operations and reduce project complexity. The ABB Ability System 800xA platform addresses this trend with the Select I/O system, which decouples project tasks and minimizes late-stage changes. The TU865 plays a central role by providing a robust Ethernet Fieldbus Communication Interface Module Termination Unit for reliable data exchange.
Introducing the ABB TU865
The TU865 3BSE078712R1 is an MTU for Ethernet FCI designed for the Select I/O architecture. It connects up to 12 Select I/O MTUs and hosts single or redundant Ethernet Adapters (TC810, TC811) and Ethernet FCI Communications Interface Modules (CI845s) for communication with AC 800M controllers. The unit also supports an optional High Integrity Module (HI880) for SIL 3 safety applications and mounts on a vertical DIN rail.
Key Technical Specifications
The TU865 operates in a wide temperature range from -40 °C to +70 °C, making it suitable for harsh environments. It measures 135 mm in width, 95.5 mm in depth, and 210 mm in height, with a weight of 500 g including the base. The device carries IP20 protection and complies with multiple safety and EMC standards, including IEC/EN 61010-1 and IEC/EN 61000-6-4.
Applications in Modern Manufacturing
In process industries such as oil and gas, the TU865 enables reliable Ethernet communication for distributed I/O points. For example, in a typical chemical plant, the module connects field devices to the control system while supporting hazardous area installations (ATEX II 3G and IECEx). Its ability to host redundant adapters ensures high availability in critical processes.
Compatibility and Integration
The TU865 integrates seamlessly with ABB AC 800M controllers via Ethernet FCI modules. It works with Select I/O MTUs and supports both single and redundant configurations. The unit also accommodates the HI880 module for SIL 3 safety applications, enhancing system integrity. All connections use standard Ethernet protocols as specified in the product data.
Comparison with Similar Products
Compared to standard I/O termination units, the TU865 offers dedicated Ethernet FCI support and hazardous area certification. While basic MTUs may lack redundancy options, the TU865 hosts dual adapters for fault-tolerant operation. Its wide temperature range and marine certifications (DNV, ABS) also set it apart from less rugged alternatives.
Frequently Asked Questions
What is the operating temperature range of the TU865?
The TU865 operates from -40 °C to +70 °C, as specified in the product data. This range suits both cold storage and hot industrial environments.
Can the TU865 be used in hazardous areas?
Yes, the TU865 carries ATEX II 3G and IECEx certifications for hazardous locations. It also meets cULus requirements for Class I, Division 2 areas.
Does the TU865 support redundant communication?
Yes, the TU865 hosts both single and redundant Ethernet Adapters (TC810, TC811) for reliable communication with AC 800M controllers.
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