Author Archives: changxin

ABB TBU850-A Termination Base – Trusted by Refineries and Utilities for Sensor Integration

Description The ABB TBU850-A is a high-performance Termination Base Unit engineered for the ABB S800 I/O system. It serves as the physical and electrical interface between field sensors (such as thermocouples, mV sources, and potentiometers) and the S800 analog input modules (e.g., AI810. AI815). The TBU850-A provides essential signal conditioning functions, including galvanic isolation, cold junction compensation (CJC) for thermocouples, and linearization. By isolating the field side from the system…

ABB TBU812-2 (3BSE041756R2): High-Density Base Unit for S800 I/O Systems

escription The ABB TBU812-2 (Order No. 3BSE041756R2) is a specialized Terminal Base Unit designed for the ABB S800 I/O system, specifically engineered to host compact electronic modules (such as TU812V1 compatible modules) in high-density configurations. Unlike standard terminal units, the TBU812-2 serves as the physical and electrical interface between the field wiring and the S800 I/O electronics, providing robust screw-terminal connections, internal…

ABB 3BSE017235R1: Critical Spare for Continuous Operation in Pulp, Paper, and Utility Sectors

Description The TBU810 (Order Code: 3BSE017235R1) is a specialized Termination Base Unit manufactured by ABB, designed specifically for the S800 I/O system within the AC 800M distributed control system (DCS) architecture. This compact base unit serves as the mechanical and electrical interface between the field wiring and the S800 I/O modules (such as DI810. DO810. AI810. AO810). Unlike larger base units, the TBU810 is engineered for…

Immune to EMI: Authentic ABB 3BSE008560R1 Optical ModuleBus Interface Module

Description The ABB TB810 (Order Number: 3BSE008560R1) is a specialized ModuleBus Optical Port interface module designed for ABB’s AC 800M controllers and S800 distributed I/O systems. This module serves as the critical bridge that converts electrical ModuleBus signals into fiber optic signals, enabling high-speed, noise-immune communication between the central processor and remote I/O stations. In complex industrial environments where electromagnetic interference (EMI), ground loops, or long…

ABB TB5610-2ETH CPU Base Unit – Dual Ethernet Port Backbone for AC 500 PLC Systems

Description The ABB TB5610-2ETH is a robust CPU base unit designed specifically for the ABB AC 500 series of programmable logic controllers (PLCs). Serving as the foundational hardware platform, the TB5610-2ETH houses the processor module (PM) and provides critical connectivity features, including two integrated Ethernet ports for flexible network topologies (e.g., line, star, or ring). Uniquely, this model features one communication coprocessor…

ABB TB870F Terminal Base Module for Freelance AC 800F/AC 900F DCS

Description The ABB TB870F is a robust Terminal Base Module engineered specifically for the ABB Freelance DCS ecosystem, providing the critical interface for AC 800F and AC 900F I/O modules. This versatile unit serves as the primary connection point for field instrumentation, offering secure screw-terminal blocks for wiring and, in specific configurations, integrated termination resistors essential for high-speed fieldbus communications (such as Profibus-DP or CAN). Designed to…

ABB TB853 Termination Unit – High-Reliability Base for Dual-Channel Control Links

Description The ABB TB853 is a specialized Termination Base designed exclusively for Redundant Control Links (RCU) within the ABB AC 800M controller family. Serving as the crucial interface between the controller’s communication ports and the fieldbus cabling (typically Profibus DP or ABB proprietary links), the TB853 ensures signal integrity in high-speed, dual-channel networks. Its defining feature is the built-in Terminal Resistance (usually selectable or fixed at 120Ω),…

Reliable ABB TB852 (3BSC950263R1): Secure Your AC 800M Remote I/O & Communication Redundancy

Description The ABB TB852 (Order No: 3BSC950263R1) is a specialized RCU (Remote Control Unit) Link Interface Module designed exclusively for the ABB AC 800M control system platform. While often mistakenly referred to as a “redundant controller,” the TB852 actually serves as the critical communication gateway that enables PM86x series controllers (including redundant pairs like PM867) to connect to distributed S800 I/O stations over long distances via fiber…

ABB TB851: Essential CEX-Bus Terminal Unit for S800 I/O & AC 800M Systems

Description The ABB TB851 is a specialized Terminal Unit designed for the ABB S800 I/O system, specifically serving as the CEX-Bus termination point. The CEX-Bus (Controller Extension Bus) is the high-speed serial communication link that connects the AC 800M controller (via a CI854. CI855. or CI867 communication interface) to the distributed S800 I/O modules (DI, DO, AI, AO, etc.). The primary function of the TB851 is…

ABB TB846 Redundant Module Bus Outlet: Critical Interface for AC 800M High-Availability Systems

Description The ABB TB846 (Order Code: 3BSE021439R1) is a specialized Redundant Module Bus Outlet designed specifically for the ABB AC 800M series of programmable logic controllers (PLCs). Serving as a critical interface component, the TB846 facilitates high-speed, deterministic communication between redundant controller units (PM856. PM860. PM861. etc.) and their associated I/O networks or fieldbus segments. It acts as the physical termination and…