ABB TU839 3BSE046966R1 S800 I/O Extended Module Termination Unit

Description

The TU839 3BSE046966R1 is a passive termination base for mounting S800 series modules on DIN rails. The "Extended" version features 26 terminals for more field wiring options. It routes field power and signals to the ModuleBus while maintaining signal integrity. The mechanical keying system ensures only compatible modules are installed, preventing electrical mismatches. Designed for industrial use, the TU839 supports hot-swapping of modules, allowing maintenance without disrupting control or disconnecting field cables.

Specifications

• Manufacturer: ABB

• Model Number: TU839 (3BSE046966R1)

• Product Type: Extended Module Termination Unit (MTU)

• Terminal Points: 26 Screw-clamp terminals

• Maximum Voltage: 50 V DC

• Current Rating: Up to 2 A per channel

• Mounting: 35mm DIN rail (Horizontal or Vertical)

• Connector Integrity: Vibration-proof screw terminals

• Internal Bus: ModuleBus interface support

• Environmental Rating: IP20

• Weight: 0.51 kg

Features

• Expanded Field Connectivity: Features 26 termination points to accommodate signal, power return, and shield connections directly on the base unit.

• ModuleBus Backplane: Provides a reliable electrical path for high-speed data transfer between the mounted I/O module and the controller.

• Integrated Safety Coding: Mechanical keying prevents the insertion of incorrectly rated modules, protecting the system against configuration errors.

• Live Maintenance Support: Fully supports hot-swapping, enabling the replacement of I/O modules while the station remains powered and operational.

• Noise Mitigation: Optimized grounding and shielding terminals help protect sensitive signals from high-frequency electromagnetic interference.

• Industrial Durability: Constructed with flame-retardant materials designed to withstand the thermal and mechanical stresses of process automation facilities.