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

Overview

The ABB TU811 (Part Number: 3BSE008526R1) is a compact, single-slot Module Termination Unit (MTU) designed for the S800 I/O platform. It functions as a non-redundant, passive interface baseplate that connects a single S800 I/O module to the ModuleBus, providing 250V-rated isolated terminal channels for safe and reliable field signal aggregation.

Technical Specifications

• Product Type: Compact Module Termination Unit (MTU) for Non-Redundant Configurations
• Model Code: TU811
• Part Number: 3BSE008526R1
• Manufacturer: ABB
• System Family Compatibility: S800 I/O System (Compatible with various 800-series modules)
• Channel / Module Capacity: Single-slot layout (1 module per MTU)
• Maximum Rated Isolation Voltage: 250 V AC/DC
• Maximum Continuous Current per Channel: 3 A
• Terminal Type: Compression screw terminal block architecture
• Ingress Protection Rating: IP20 (IEC 60529 Compliant)
• Conformal Coating: Factory standard protection for harsh environment reliability
• Mounting Style: Horizontal or Vertical 35 mm DIN Rail
• Physical Dimensions: 17.1 cm x 5.8 cm x 4.2 cm
• Product Net Weight: 0.17 kg

Installation Notes

• Snap the TU811 MTU firmly onto the cabinet DIN rail until the rear locking mechanism fully engages.
• Ensure the integrated grounding clip makes solid, paint-free contact with the metallic rail to guarantee reliable EMI/RFI shielding.
• Set the mechanical keying wheels on the MTU face to exactly match the designated keying profile of the target S800 I/O module before slotting the electronics in.
• Terminate field loop wiring into the screw terminal blocks, ensuring proper wire strip lengths to preserve the touch-safe IP20 rating.