3BSE013231R1 | TU811B | ABB | S800 I/O Termination Base

Shopify Product Title

ABB TU811B 3BSE013231R1 Compact Module Termination Unit (MTU)

Product Description

Product Overview

The TU811B (Ordering Code: 3BSE013231R1) is a high-density Compact Module Termination Unit (MTU) engineered for the ABB S800 I/O system. It serves as the primary physical mounting and wiring interface for electronic I/O modules within the AC 800M and System 800xA control architectures. As a passive unit, the TU811B provides a secure environment for signal distribution, field power management, and ModuleBus communication. Its design emphasizes cabinet space efficiency, featuring a vertical orientation that supports up to 32 signal terminals, making it ideal for large-scale distributed control system (DCS) deployments.

Detailed Technical Specifications

The TU811B is designed for high-integrity signal routing in industrial environments.

• Manufacturer: ABB

• Model Number: TU811B

• Product ID: 3BSE013231R1

• System Compatibility: S800 I/O, AC 800M, System 800xA

• Terminal Configuration: 1 × 32 signal terminals (Single-row high density)

• Rated Isolation Voltage: 50 V

• Rated Current: 2 A per terminal (Total unit maximum subject to I/O module limits)

• Mounting: Standard 35mm DIN Rail (Horizontal or Vertical)

• Connectivity: Integrated ModuleBus for internal system communication

• Mechanical Protection: IP20

• Operating Temperature: -25°C to +70°C

• Dimensions: 170 mm (H) × 64 mm (W) × 64 mm (D)

• Weight: 0.17 kg

• Country of Origin: Sweden

Operational Capabilities and Benefits

• High-Density Wiring: By utilizing a single-row 32-terminal arrangement, the TU811B allows for the termination of multi-channel digital or analog modules in a compact 64mm width, significantly reducing the required rack space.

• Passive Integrity: The absence of active electronic components on the baseplate ensures maximum reliability and a high Mean Time Between Failures (MTBF), as there are no sensitive circuits to fail under thermal stress.

• Serviceability: The MTU allows for "Hot Swapping" of S800 I/O modules. Field wiring remains securely attached to the TU811B base while the electronic module is removed or replaced, eliminating the risk of wiring errors during maintenance.

• Environmental Resistance: The industrial-grade housing is designed to withstand the vibration and electromagnetic noise common in power generation, chemical, and water treatment facilities.