ABB UNS0881a-P,V1 3BHB006338R0001
Description
The ABB UNS0884A-V1(Order Code:3BHE004385R0001)is the official designation for the AC 800M PM864 programmable logic controller(PLC)CPU module,a cornerstone of ABB’s System 800xA distributed control system(DCS).Designed for mission-critical industrial automation in power generation,oil&gas,mining,and chemical processing,this high-reliability controller delivers deterministic execution of complex logic,regulatory control,and safety functions.With support for full hardware redundancy,dual Ethernet communication,Profibus DP,and compliance with IEC 61508 SIL 3(in certified configurations),the PM864 ensures continuous,secure,and safe plant operation—even under extreme conditions.
Note:“UNS0884A-V1”is ABB’s internal product family code;“3BHE004385R0001”is the global order number used for procurement and lifecycle management.
Application Scenarios
At a combined-cycle power plant in Texas,two ABB PM864(UNS0884A-V1)CPUs operate in synchronized redundant mode to control boiler feedwater,turbine bypass,and emissions systems.During a lightning-induced grid fault that tripped one controller’s power supply,the standby unit assumed full control within<10 ms—with zero process interruption.Simultaneously,the integrated cyber-secure web server allowed remote engineers to diagnose the event via encrypted HTTPS,while the built-in OPC UA server streamed real-time data to the corporate historian.Over 7 years of operation,the system achieved 99.999%availability,proving the PM864 as the digital brain behind resilient,modern energy infrastructure.
Parameter
Main Parameters Value/Description
Product Model UNS0884A-V1
Order Code 3BHE004385R0001
Common Name AC 800M PM864 CPU Module
Manufacturer ABB Ltd.(Process Automation/now part of Hitachi Energy portfolio)
Product Category High-End Redundant-Capable PLC CPU for System 800xA
Processor 32-bit/64-bit RISC(PowerPC-based),266 MHz
Application Memory 16 MB(for user program and data)
RAM 256 MB(for runtime execution)
Execution Speed~0.1µs per Boolean instruction
Redundancy Full hot-standby redundancy(CPU+power+I/O sync via fiber or copper)
Communication Ports
•2×10/100 Mbps Ethernet(for Control Network&OPC)
•1×RS-232(service port)
•1×Profibus DP master/slave(via optional CI854 module or onboard variant)
Supported Protocols Modbus TCP,IEC 60870-5-104,OPC DA/UA,Profinet(with gateway),AC 800M proprietary
Programming Standards IEC 61131-3(LD,FBD,ST,SFC,IL)via Control Builder M
Functional Safety SIL 3 capable per IEC 61508(when used with certified libraries and architecture)
Diagnostics LED status(RUN,STOP,I/O COMM,REDUNDANCY),error logging,watchdog timer
Mounting Slide-in module for AC 800M rail-mounted baseplate(e.g.,TK817B)
Power Consumption~10 W(supplied via backplane from redundant PSUs like 086407-502)
Operating Temperature 0°C to+60°C
Certifications CE,UL 61010-2-201,cULus,IEC 61508 SIL 3,IEC 62443-3-3(cybersecurity),RoHS
Dimensions Standard AC 800M width(~40 mm),height~180 mm
Note:Requires compatible AC 800M baseplate(e.g.,TK817B)and redundant power supplies for high-availability deployments.
Technical Principles and Innovative Values
Innovation Point 1:Deterministic Redundancy with Zero Bump Transfer
Using ABB’s synchronous shadowing technology,the standby CPU mirrors the active unit’s memory and I/O states in real time—ensuring seamless failover without process reset.
Innovation Point 2:Embedded Cyber Resilience
Features secure boot,firmware signature verification,and role-based access control—aligning with IEC 62443 for OT security in critical infrastructure.
Innovation Point 3:Unified Engineering in System 800xA
The same Control Builder M environment configures logic,HMI,alarms,and batch recipes—reducing engineering errors and lifecycle costs.
Innovation Point 4:Long-Term Lifecycle Commitment
Despite being a mature platform,ABB continues to support the PM864 with firmware updates and spares—critical for plants with 20+year asset lifespans.
Application Cases and Industry Value
Nuclear Power:Controls reactor coolant pump sequencing with SIL 3-certified safety logic.
Offshore Oil Platform:Manages emergency shutdown(ESD)and fire/gas detection in Zone 2 hazardous areas.
Mining Conveyor System:Coordinates 12 km of belt drives with millisecond-level synchronization.
Pharmaceutical Batch Reactor:Executes GAMP 5-compliant recipes with full audit trail and electronic signatures.
In each case,the UNS0884A-V1(PM864)delivers determinism,reliability,and regulatory traceability—making it a trusted backbone in industries where failure is not an option.
Related Product Combination Solutions
ABB 086407-502:Redundant 24 V power supply for PM864 CPU
ABB TK817B:Baseplate supporting dual redundant CPUs and I/O
ABB CI854/CI864:Communication interfaces(Profibus,Modbus,etc.)
ABB AO810/DI810/DO810:Analog/digital I/O modules controlled by PM864
ABB System 800xA Engineering Studio:Integrated development and operations environment
ABB Asset Optimization Suite:Uses PM864 data for predictive maintenance
Redundant Fiber Optic Link(e.g.,TB842):For long-distance CPU synchronization
ABB Cyber Security Manager:Monitors and hardens PM864 firmware integrity
Installation,Maintenance,and Full-Cycle Support
Installation requires:
Proper grounding and EMI shielding in the control cabinet
Use of redundant power supplies and baseplates
Firmware version alignment between primary and standby units
Maintenance best practices include:
Monthly backup of application logic and configuration
Annual validation of redundancy switchover during planned outages
Monitoring CPU load and memory usage via 800xA diagnostics
Every ABB UNS0884A-V1(3BHE004385R0001)we supply is:
✅Tested for CPU boot,Ethernet communication,and redundancy handshake
✅Verified against ABB’s hardware revision and firmware compatibility matrix
✅Supplied with original packaging,labels,and documentation
We offer a 24-month warranty,access to official ABB manuals(including MTBF>100,000 hours),and global logistics support.Whether you’re maintaining legacy infrastructure,executing a brownfield upgrade,or securing long-term spares,our team ensures your PM864 operates exactly as ABB engineered it—for decades to come.
Contact us for a customized solution—because in industrial automation,the right controller doesn’t just run your process…it safeguards your future.
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ABB UNS0881a-P,V1 3BHB006338R0001
