Industry Trends in Ethernet-Based I/O Systems
The industrial automation sector increasingly adopts Ethernet-networked I/O solutions to streamline project execution and reduce costs. ABB's Select I/O platform addresses this trend by decoupling project tasks and minimizing the impact of late design changes. The TU865 plays a central role in this architecture as a termination unit for Ethernet Fieldbus Communication Interface Modules.
Introducing the ABB TU865
The ABB TU865 3BSE078712R1 is an MTU for Ethernet FCI designed for the Select I/O system within the ABB Ability System 800xA automation platform. This unit connects up to 12 Select I/O MTUs and hosts single or redundant Ethernet Adapters (TC810, TC811) and Ethernet FCI Communications Interface Modules (CI845s). It also supports an optional High Integrity Module (HI880) for SIL 3 safety applications, with mounting on a vertical DIN rail.
Technical Specifications and Performance
The TU865 operates in a wide temperature range from -40 °C to +70 °C, with storage capability up to +85 °C. It meets Pollution Degree 2 per IEC 60664-1 and has an IP20 protection class. The unit weighs 500 g and measures 135 mm wide, 95.5 mm deep, and 210 mm high. It carries multiple hazardous area certifications including ATEX, IECEx, and cULus for use in Zone 2 and Division 2 locations.
Applications in Modern Manufacturing
In process industries such as oil and gas, the TU865 enables reliable Ethernet communication between field devices and AC 800M controllers in hazardous environments. For discrete manufacturing, its support for redundant adapters ensures high availability in critical production lines. The unit's G3 corrosive atmosphere rating makes it suitable for harsh chemical or wastewater treatment plants.
Real-World Application Example
Consider a chemical processing facility requiring SIL 3 safety functions and hazardous area compliance. The TU865 hosts the HI880 module and connects to redundant CI845 interfaces, providing fault-tolerant communication to the AC 800M controller. This setup helps the facility meet safety integrity levels while maintaining operational uptime.
Integration with ABB Ability System 800xA
The TU865 integrates seamlessly with the ABB Ability System 800xA platform, supporting both single and redundant Ethernet adapter configurations. It works with TC810 and TC811 adapters and CI845 communication interface modules. The included TL814K01 cover plate ensures proper installation on a vertical DIN rail.
Frequently Asked Questions About the TU865
What is the operating temperature range of the TU865?
The TU865 operates from -40 °C to +70 °C and can be stored from -40 °C to +85 °C, making it suitable for extreme industrial environments.
Does the TU865 support hazardous area installations?
Yes, the TU865 carries ATEX, IECEx, and cULus certifications for use in hazardous locations, including Zone 2 and Division 2 areas. It also meets IEC/EN 61010-1 electrical safety standards.
How many Select I/O MTUs can the TU865 connect to?
The TU865 connects up to 12 Select I/O MTUs, supporting both single and redundant Ethernet adapter configurations for reliable communication with AC 800M controllers.
Why Choose CtrlTechDaily for Your ABB Needs
CtrlTechDaily offers the ABB TU865 with expert support and reliable supply chain assurance. Our team helps you verify lifecycle status and availability before ordering. Contact us for detailed specifications and pricing.
