TU851 3BSE068782R1 | ABB S800 Termination Unit

Overview

The ABB TU851 (Part Number: 3BSE068782R1) is a compact, single Module Termination Unit (MTU) designed for the S800 I/O automated platform. Serving as a non-redundant, passive interface baseplate, it allows a single S800 I/O module to securely connect to the system ModuleBus, providing field wiring terminal aggregation without active electronic failure points.

Technical Specifications

• Product Type: Module Termination Unit (MTU) for Non-Redundant Configuration
• Model Code: TU851
• Part Number: 3BSE068782R1
• Manufacturer: ABB
• System Compatibility: S800 I/O / AC 800M Controller Platforms
• Channel / Module Capacity: Single-slot layout for non-redundant I/O configurations
• Maximum Rated Voltage: 50 V
• Terminal Connection Type: Compression screw terminal block architecture
• Ingress Protection Rating: IP20 (IEC 60529 Compliant)
• Conformal Coating: Available standard for harsh environment compatibility

Installation Notes

• Snap the TU851 MTU securely onto the standard cabinet DIN rail until the locking tabs engage.
• Configure the mechanical keying locks on the MTU surface to match the specific structural profile of the target S800 I/O module before mounting it.
• Terminate field sensor pairs and loop wiring into the dedicated compression terminals, ensuring correct wire stripping length to preserve the IP20 finger-safe rating.
• Verify that the carrier DIN rail is firmly bonded to the master enclosure common ground bus bar to guarantee reliable noise rejection.