Description

Brief Product Description

The ABB TB806 (3BSE008536R1) is a specialized Modulebus extension adapter designed to facilitate secure electrical connections between S800 I/O stations. It serves as the essential interface for TK801 extension cables, ensuring high-speed data integrity across distributed Advant OCS and System 800xA architectures.

​Product Description

The TB806, identified by part number 3BSE008536R1, functions as a critical connectivity component within the ABB S800 I/O system. This adapter enables the extension of the Modulebus, allowing controllers to communicate with remote I/O clusters located in separate cabinet rows or sections. By utilizing a high-precision male D-sub 25-pin connector, the TB806 provides a standardized and mechanically secure link that maintains the electrical characteristics required for high-speed bus communication.

Signal Integrity and Network Expansion

System reliability depends heavily on the quality of bus connections. The TB806 ensures that signal timing and voltage levels remain within strict tolerances during network expansion. Specifically, engineers must utilize one TB806 adapter for every TK801 extension cable deployed in the system. This mandatory 1:1 ratio guarantees that the transition between the internal module bus and the external extension cabling does not introduce impedance mismatches or signal degradation. Consequently, this unit plays a vital role in preventing data packet loss within complex Distributed Control System (DCS) environments.

Industrial Construction and Application

ABB manufactures the TB806 to meet the rigorous demands of Advant OCS and Advant-800xA installations. The unit features a robust housing that protects sensitive internal connections from the dust and thermal variations common in industrial control rooms. Although it functions as a passive electrical interface, its role in system architecture is fundamental; it allows for flexible hardware layouts while adhering to the stringent EMC requirements of the Swedish manufacturing standard. This combination of physical durability and precise electrical engineering makes the TB806 a cornerstone of stable automation infrastructure.

Technical Specification Table