Category Archives: News

TU844 3BSE021445R1: Ruggedized Base Plate for Redundant Control Architectures

Description The TU844 (Part Number: 3BSE021445R1) is a specialized Redundant Module Termination Unit (MTU) manufactured by ABB. Designed for the S800 and AC 800M I/O systems, this unit serves as the physical foundation for high-availability automation setups. Unlike standard bases that hold a single module, the TU844 is engineered to mount two I/O modules side-by-side (e.g., two AI810 or AO810 modules). It provides the necessary wiring interface and internal bus…

ABB S800 I/O TU843 3BSE021443R1 Redundant Bus Unit

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…

ABB TU842 3BSE020850R1 Redundant MTU Baseplate

Product Overview The ABB TU842 is a specialized Redundant Module Termination Unit (MTU) designed for the ABB S800 I/O system, a critical component within the broader AC 800M control architecture. Identified by the part number 3BSE020850R1. this unit is engineered to support high-availability applications where system reliability is paramount. Unlike standard termination units that support a single I/O…

ABB TU847 (3BSE022462R1) Redundant PROFIBUS Termination Unit

Description The TU847 (Order Code: 3BSE022462R1) is a specialized Module Termination Unit (MTU) manufactured by ABB, designed to support the CI840 and CI840A field communication interfaces. It serves as a critical hardware component for establishing PROFIBUS DP redundancy, allowing industrial networks to maintain communication even if a primary cable path fails. Functioning as a redundancy link module,…

ABB TU849 3BSE077475R1 S800 I/O Base Unit

Product Overview The ABB TU849 is a specialized Module Termination Unit (MTU) designed for the ABB S800 I/O system, specifically engineered to support “1oo1” (1 out of 1) architecture configurations. This unit serves as the critical physical interface between the S800 I/O modules and the field wiring, providing a robust and reliable connection point for process signals.…

ABB TU841 3BSE020848R1 Base for Non-Redundant I/O

Description The ABB TU841 (Order Code: 3BSE020848R1) is a redundant I/O baseplate designed for the ABB S800 I/O system. This unit serves as the physical and electrical foundation for the TB840 or TB840A modem modules, providing a secure and reliable interface for distributed I/O applications. Engineered for high-reliability environments, the TU841 is specifically designed to support non-redundant I/O modules while…

ABB TU836V1 3BSE021445R1 Relay Output Extension Base

Product Overview The ABB TU839 and TU836V1 are specialized extension units (Module Termination Units or MTUs) designed specifically for the ABB S800 I/O system. These units serve as the essential physical and electrical interface for the DO820 and DO821 16-channel relay output modules. The ABB TU836V1 (Ordering Number 3BSE021445R1) and its counterpart TU839 are engineered to handle the high current and voltage requirements typical of relay outputs,…

ABB 3BSE008572R1 TU838: Space-Efficient Extended Termination Solution

Description The TU838 (Order Code: 3BSE008572R1) is an extended module termination unit (MTU) manufactured by ABB, specifically engineered for the S800 I/O system. Operating at a rated voltage of 50V, the TU838 serves as a sophisticated interface that connects field wiring to high-integrity digital input/output modules. Distinguished by its “extended” form factor, this unit provides ample space for complex…

ABB TU838 Extended Termination Board: Optimized for 250V High-Voltage Applications

Description The ABB TU838 3BSE008572R1 is an Extended Module Termination Unit (MTU) engineered to provide a robust and safe interface between ABB S800 I/O modules and field wiring. This unit features a 250V insulation rating, making it the ideal solution for high-voltage digital and analog applications where safety and isolation are paramount. The ABB TU838 3BSE008572R1 offers an “extended”…

ABB TU837V1: The Essential Link for 230VAC Field Devices

Description The TU837V1 (Part Number: 3BSE013238R1) is a specialized Extended Module Termination Unit (MTU) manufactured by ABB. Designed for use with the S800 and AC 800M I/O systems, this module serves as the physical interface that connects high-voltage field wiring to the internal DO820 or DO821 digital output modules. It is specifically engineered to support 230VAC digital outputs, providing a secure, screwless connection point for field devices while…