ABB TU860 3BSE078710R1 S800 I/O MTU for Ethernet FCI

Product Overview

When your distributed control system demands reliable and modular I/O connectivity, the ABB TU860 3BSE078710R1 delivers. This MTU (Module Termination Unit) is part of the ABB S800 I/O family, a comprehensive distributed process I/O system. It communicates with parent controllers over industry-standard Ethernet fieldbus technology. The TU860 connects up to 12 single or redundant S800 I/O modules and Module Termination Units, hosting single or redundant Ethernet Adapters (TC810, TC811) and Ethernet FCI Communications Interface Modules (CI845s) for robust communication with AC 800M process controllers.

Technical Specifications Breakdown

The TU860 operates in a wide temperature range of -40°C to +70°C, making it suitable for harsh industrial environments. It stores safely from -40°C to +85°C. The unit measures 135 mm wide, 95.5 mm deep, and 210 mm high, weighing 500 g. It mounts on a 35 mm DIN rail and offers IP20 protection. The MTU supports redundant 24 V power supplies via two connectors and includes two Modulebus connectors for I/O cluster expansion. It meets EMC standards IEC/EN 61000-6-4 and IEC/EN 61000-6-2, and electrical safety per IEC/EN 61010-1 and UL 61010-1.

Industry Applications

In process industries like oil and gas, chemical, and power generation, the TU860 provides reliable I/O connectivity for critical control loops. Its wide operating temperature and hazardous area certifications (ATEX II 3G, cULus for Class I Division 2) allow installation in challenging environments. The redundant power and Ethernet adapter slots ensure high availability, reducing unplanned downtime. Compared to older non-redundant MTUs, the TU860 offers enhanced reliability and simplified cabling, lowering total cost of ownership over the system lifecycle.

Installation & Setup Guidance

Mount the TU860 on a 35 mm DIN rail in a suitable enclosure. Connect single or redundant 24 V power supplies to the two dedicated connectors. Install up to 12 S800 I/O modules and Module Termination Units on the MTU. For Ethernet communication, insert one or two CI845 FCI modules and/or TC810/TC811 Ethernet Adapters into the designated slots. Use the two Modulebus connectors to link the I/O cluster. Ensure proper grounding and follow local electrical codes. The unit is rated for Pollution Degree 2 and overvoltage Category II.

Compatibility & Integration

The TU860 integrates seamlessly with ABB AC 800M process controllers via Ethernet FCI communication. It supports single or redundant CI845 modules and TC810/TC811 Ethernet Adapters. The S800 I/O system communicates over industry-standard Ethernet fieldbus, enabling easy integration into existing DCS architectures. The MTU is compatible with all S800 I/O modules, providing a scalable and modular I/O solution.

Selection Guide & Purchasing Advice

Before ordering, verify that your system requires an MTU for Ethernet FCI with support for up to 12 modules. Confirm the need for redundant power and Ethernet adapters based on your availability requirements. The TU860 is ideal for new installations or upgrades of existing S800 I/O systems. BluePLC Industrial offers this ABB TU860 3BSE078710R1 with fast shipping and expert support. Please verify current lifecycle status and availability with BluePLC Industrial before ordering.