ABB TU841 3BSE020848R1 S800 I/O Redundant Module Termination Unit

Description

The TU841 MTU supports two redundant 24 V DC digital input modules, sharing field wiring to maintain signal flow if one module fails or is replaced. With individual channel power and a passive backplane for hot-swapping, it ensures uninterrupted operation in high-uptime, safety-critical environments.

Specifications

• Manufacturer: ABB

• Country of Origin: Sweden

• Model Number: TU841

• Order Number: 3BSE020848R1

• Product Series: S800 I/O

• Capacity: Dual-slot for Redundant Pairs

• Input Channels: 16 Channels

• Rated Voltage: 24 V DC

• Maximum Current: 8 A per unit

• Mounting: 35mm DIN Rail

• Weight: 0.54 kg

Features

• Dual-Slot Redundancy: Facilitates the installation of two modules in parallel to eliminate single points of failure in digital input loops.

• Integrated Field Termination: Consolidates wiring for 16 discrete channels into a single, organized terminal block for simplified installation.

• Hot-Swap Support: Enables module extraction and insertion under power, ensuring the I/O station remains operational during maintenance.

• Mechanical Security: Equipped with specific coding keys for each slot to prevent the insertion of incorrect module types.

• Galvanic Protection: Designed to provide robust isolation between field-side wiring and the internal ModuleBus logic.