Description

The ABB TB852(3BSC950263R1)is the core control module of the Symphony Plus distributed control system(DCS),responsible for critical logic operations and system coordination.It offers stable performance and strong anti-interference capabilities,designed specifically for harsh industrial environments such as power plants and chemical plants.It supports hot-swappable and redundant configurations,ensuring high system availability.

Authentic and highly compatible,it’s an ideal choice for building high-reliability automation systems!

Supply Voltage:24V DC

Operating Temperature:0°C to 55°C

Communication Interface:Ethernet,Profibus DP

Protection Rating:IP20

TB852 3BSC950263R1 Technical Specifications

Product Model:3BSC950263R1

Manufacturer:ABB

Product Type:Control Module

Other Names/Common Names:TB852

Supply Voltage:24V DC(+20%/-15%)

Power Consumption:Typical 18W

Operating Temperature:0°C to 55°C

Storage Temperature:-40°C to 80°C

Relative Humidity:5%to 95%RH,non-condensing

Mounting Method:DIN Rail Mount(Symphony Rack)

Communication Protocols:Ethernet TCP/IP,Profibus DP,Modbus RTU

Processor:32-bit high-performance industrial processor

Memory:128MB Flash,256MB RAM

Dimensions(H×W×D):Approximately 300mm×30mm×200mm(standard Symphony module width)

Weight:Approximately 1.2kg

Certifications:CE,UL,FM,CSA,TUV

TB852 3BSC950263R1 Product Overview

The ABB TB852(3BSC950263R1)is the heart of the ABB Symphony Plus distributed control system(DCS).You’ll likely see it in the control rooms of thermal power plants,chemical plants,and large water treatment plants.More than just a controller,it’s the brains of the entire system,managing hundreds of I/O points and executing complex control logic,interlocking protection,and data acquisition.

The serial number 3BSC950263R1 is ABB’s part number,while TB852 is a nickname passed down by engineers,instantly identifying the board.It typically comes in pairs for redundancy,with one active and one standby.If the primary card fails,the standby takes over seamlessly within 0.1 seconds,leaving the system perfectly intact.This design is considered a”hard requirement”in the power industry,where even a single second of downtime can be disastrous.

This TB852 module plugs into the Symphony rack and communicates with other modules via the Control Bus and I/O Bus.It supports Ethernet and Profibus DP,making it easily integrated into host monitoring systems(such as Symphony Harmony or third-party SCADA systems).Programming is done using ABB’s own Advant Controller 800xA software,which supports multiple languages,including Function Block Diagram and Ladder Logic,making it easy for experienced engineers to master.

Main Features and Advantages

The TB852 3BSC950263R1’s most impressive features are its stability and speed.Its processor is an industrial-grade 32-bit chip,with 128MB of flash memory and 256MB of RAM.Back then,it was a top-tier spec,capable of running even complex combustion control logic without a card.Even more remarkable are its diagnostic capabilities—it records every detail,from power supply and communication to I/O status,making troubleshooting as accurate as looking into a”black box.”

It supports hot swapping,allowing card replacement without downtime,a significant savings for continuous production companies.Furthermore,its robust anti-interference capabilities,with power isolation,signal isolation,and electromagnetic shielding,are layered on top of each other,capable of withstanding 6000V lightning surges.Even in the harsh electromagnetic environment of power plants,it remains remarkably stable.

Furthermore,the TB852 fully complies with the IEC 61508 functional safety standard and can be used in SIL 2-rated safety instrumented systems(SIS).This means it’s not just an ordinary PLC,but a rigorously validated,industrial-grade device suitable for critical control loops.Its firmware is upgradeable and its programs can be backed up,making it highly maintainable.Although ABB is currently promoting the 800xA platform,the TB852 still runs on thousands of legacy systems worldwide,and its status in the industry won’t change for a while.

The ABB TB852(3BSC950263R1)is a high-performance control module at the heart of the Symphony Plus DCS platform.Engineered for mission-critical applications in power generation and process industries,it delivers exceptional reliability,fast processing,and seamless redundancy.With robust communication interfaces,comprehensive diagnostics,and SIL 2 capability,the TB852 ensures continuous,safe operation in the harshest industrial environments.A proven workhorse for demanding automation tasks.

Application Areas

The TB852(3BSC950263R1)is primarily used in industries with”zero tolerance”system stability requirements.Examples include boiler combustion management systems(BMS),digital electro-hydraulic control(DEH)for steam turbines,and balance of plant operation(BOP)control systems in thermal power plants;reactor interlocking protection and compressor control in large petrochemical enterprises;and full-process automation monitoring in desalination plants.

It is particularly well-suited for large-scale distributed control system(DCS)projects,especially upgrades and retrofits of older plants that have been in operation for over a decade.Many customers,unwilling to start over,use the TB852 as the core controller and add new I/O modules,preserving their original investment while improving control performance.Simply put,wherever”large-scale continuous production”and”high safety requirements”are required,the TB852 has its place.