Product Overview

The ABB TU843 (Order No. 3BSE021443R1) is a specialized termination unit designed specifically for the ABB S800 I/O system, serving as the critical interface for PROFIBUS DP communication. Unlike standard I/O termination units, the ABB TU843 is engineered to handle high-speed fieldbus signals, ensuring reliable data exchange between the central controller and distributed field devices. This unit provides the necessary physical connection point for the PROFIBUS cable, integrating bus termination resistors and connection terminals into a compact, DIN-rail mountable housing.

As a key component of the 3BSE021443R1 series, this termination unit supports redundant bus configurations, which is essential for maintaining high system availability in critical automation processes. It allows for the seamless integration of PROFIBUS DP slaves into the S800 I/O architecture. The ABB TU843 features a robust design that protects the communication lines from electrical noise and signal reflection, ensuring data integrity across the network. By utilizing this unit, system integrators can achieve a clean, modular installation that simplifies the complex wiring often associated with fieldbus networks.