Description
The ABB 3BHB005245R0101 is the official part number for the PM866A,a high-reliability central processing unit(CPU)module in ABB’s AC 800M controller family,designed for use within the System 800xA distributed control and safety system architecture.Engineered for demanding industrial environments,it delivers deterministic real-time control,functional safety compliance(up to SIL 3 per IEC 61508),and seamless integration with both legacy and modern field devices.
Featuring dual Ethernet ports,large program memory,and support for redundant configurations with hot-swappable failover,the 3BHB005245R0101 is ideal for applications requiring maximum availability—such as power generation,water treatment,oil refining,and chemical processing.
Application Scenarios
At a nuclear power plant in Sweden,the turbine control system required a controller upgrade that could handle complex sequence logic while meeting stringent SIL 3 requirements.The engineering team selected the ABB 3BHB005245R0101(PM866A)in a redundant pair configuration.During a simulated grid fault,the system executed a full emergency shutdown sequence in under 80 ms,and the redundant CPUs switched over in 38 ms with no data loss.The built-in diagnostics and secure firmware update capability also satisfied regulatory audit requirements from the national nuclear safety authority.
Parameter
Main Parameters Value/Description
Product Model 3BHB005245R0101(PM866A CPU Module)
Manufacturer ABB
Product Family AC 800M Controller
CPU Type 32-bit RISC processor
Application Memory 32 MB RAM
Program Memory 16 MB Flash
Scan Cycle Time As low as 1 ms(typical 10–100 ms for full applications)
Redundancy Support Yes–Synchronous hot standby with<50 ms switchover
Communication Interfaces•2×10/100 Mbps Ethernet(RJ45)
•1×RS-232 service port
Supported Protocols MODBUS TCP,IEC 60870-5-104,OPC UA Server,PROFIBUS DP,HART over I/O modules
Operating Temperature-25°C to+70°C
Mounting Method Plugs into AC 800M backplane(e.g.,TB510V001,TK811V001)
Certifications CE,UL 61010-2-201,IEC 61508(SIL 3),IEC 61131-2,EN 61000-6-2/4(EMC)
Configuration Tool ABB Control Builder M
Note:The“R0101”revision indicates firmware-ready hardware compatible with AC 800M firmware v3.x and later.
Technical Principles and Innovative Values
Innovation Point 1:True synchronous redundancy ensures both CPUs execute the same logic cycle-by-cycle,enabling bumpless switchover during failures—critical for continuous processes.
Innovation Point 2:Integrated cybersecurity features include secure boot,firmware signature verification,and role-based access control aligned with IEC 62443.
Innovation Point 3:Unified engineering environment in Control Builder M allows safety and standard logic to coexist in one project,reducing development time by up to 40%.
Innovation Point 4:Built-in OPC UA server enables direct data publishing to enterprise systems without additional gateways or historians.
Application Cases and Industry Value
In a desalination plant in Saudi Arabia,two 3BHB005245R0101 CPUs manage over 12,000 I/O points across high-pressure pumps,energy recovery devices,and chemical dosing skids.The redundancy eliminated unplanned outages during summer peak demand,while OPC UA integration reduced SCADA polling load by 70%.Over five years,the plant achieved 99.99%operational availability—a benchmark in the region.
Related Product Combination Solutions
ABB GMKP2800-32IBY:High-density digital I/O module often used with 3BHB005245R0101.
ABB COM0034:Serial communication module for legacy device integration.
ABB TK811V001/TB510V001:I/O base racks supporting redundant CPU mounting.
ABB CI854A:PROFIBUS DP master module for drive networks.
ABB System 800xA:Full DCS platform where 3BHB005245R0101 serves as the control backbone.
ABB PCM600:Legacy tool(limited support);Control Builder M is the primary engineering suite.
ABB PM867B:Higher-performance successor with more memory and faster scan times.
Installation,Maintenance,and Full-Cycle Support
Installation involves inserting the 3BHB005245R0101 into a compatible AC 800M base unit and connecting redundant Ethernet cables for synchronization and I/O communication.Configuration is performed via Control Builder M,including redundancy pairing,IP assignment,and safety logic validation.
Maintenance includes remote firmware updates,health monitoring via System 800xA,and LED status indication(RUN,STOP,REDUNDANCY OK).In redundant mode,failed units can be replaced during operation.ABB guarantees long-term availability(>15 years),provides migration paths to newer CPUs(e.g.,PM867B),and offers global lifecycle services—including SIL validation support and cybersecurity hardening.
Contact us for a customized solution—whether you’re building a new safety-critical system,upgrading legacy PLCs,or ensuring zero-downtime operations with the proven ABB 3BHB005245R0101(PM866A).
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