ABB TU811 3BSE008526R1 S800 I/O Compact Module Termination Unit

Description

The TU811 3BSE008526R1 is designed for compact cabinet installations, connecting up to 8 I/O channels with a single-wire termination scheme and shared common return to save space. Its passive backplane ensures high reliability and stability by avoiding active electronics. The TU811 supports hot-swapping of S800 I/O modules for maintenance without disconnecting field cables. Mechanical keying pins prevent incompatible module insertion, safeguarding process control hardware.

Specifications

• Manufacturer: ABB

• Country of Origin: Sweden

• Model Number: TU811

• Order Number: 3BSE008526R1

• Product Type: Compact Module Termination Unit (MTU)

• Weight: 0.32 kg

• Terminal Count: 12 Screw Terminals

• Maximum Rated Voltage: 50 V DC

• Maximum Rated Current: 2 A per channel

• Wiring Type: Single-wire connection with shared return

• Mounting: 35mm standard DIN rail

• Ingress Protection: IP20

Features

• Space-Efficient Design: Compact width allows for higher I/O density within standard electrical cabinets, reducing overall hardware footprint.

• Streamlined Connectivity: Features 12 screw terminals optimized for 8-channel modules using a common return path for simplified wiring.

• Hot-Swap Support: Permits the installation and removal of active I/O modules while the station is powered, minimizing process downtime.

• Passive Circuitry Architecture: Hardware-only routing design maximizes the Mean Time Between Failures (MTBF) by removing electronic failure points.

• Mechanical Coding Safety: Built-in keying system ensures only correctly matched I/O modules can be seated, preventing accidental equipment damage.

• Universal DIN Rail Mounting: Designed for easy snap-on installation on standard 35mm rails, supporting both vertical and horizontal orientations.