ABB 3BSE045584R1 TU847 Mounting Unit | S800 I/O, 4-Slot Base

ABB 3BSE045584R1 TU847 mounting unit. 4 slots, 24V DC, for S800 I/O modules. Housing for communication and I/O modules.

Product: ABB 3BSE045584R1 TU847 Mounting Unit

The ABB 3BSE045584R1 (TU847) is a 4-slot mounting unit that serves as the mechanical and electrical backbone for the S800 I/O system within ABB's Extended Automation 800xA. It provides power, data communication, and mounting for S800 I/O and communication modules.

Key Features

• Modular Backbone:​ Houses up to 4 S800 I/O and communication interface modules.

• Integrated Power Distribution:​ Distributes 24V DC system and field power to installed modules.

• Internal Data Bus:​ Manages high-speed communication between modules and the controller network.

• DIN Rail Mounting:​ Easy installation in standard control cabinets.

Technical Specifications

Function & Application

The TU847 is the foundational hardware required to build a functional S800 I/O station. It provides the physical slots, power rails, and internal data highway that allow a communication module and up to three I/O modules to work together as a single distributed I/O node on the 800xA network.

Typical Applications

• Building distributed I/O drops for 800xA control systems in process plants.

• Creating remote I/O cabinets close to field devices to reduce wiring.

• Hosting a mix of analog and digital I/O modules for a specific process unit.

Critical System Configuration Note

This is an empty chassis and cannot function alone.​ A complete, operational I/O station requires:

1. One Communication Interface Module​ in Slot 1 (e.g., CI854 for Ethernet/IEC 61850, CI867 for PROFINET).

2. At least one I/O Module​ in Slots 2, 3, or 4 (e.g., AI, DI, AO, DO modules).

3. External 24V DC Power Supplies​ connected to its power terminals.

4. Proper termination units​ (e.g., TB842) for the I/O modules, if required.

Note: Specifications are for product identification and comparison. This is a core system component. For complete power calculations, module compatibility, and installation guidelines, consult the official ABB S800 I/O Installation and Operation Manual (3BSE020923R0101).