Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model | PM864AK01 |
| Article Number | 3BSE018161R1 |
| Product Type | Central Unit / Processor Unit Kit |
| Controller Platform | AC 800M |
| System | System 800xA |
| Processor | MPC862 |
| CPU Clock | 96 MHz |
| Memory | 32 MB |
| Application RAM | Approx. 23.522 MB |
| Boolean Performance | Approx. 0.15 ms / 1,000 Boolean operations |
| Redundancy | 1:1 CPU redundancy supported |
| Maximum Redundant Switchover | 10 ms |
| Power Supply | 24 VDC |
| Permitted Supply | 19.2–30 VDC |
| Typical Current | Approx. 287 mA |
| Maximum Current | Approx. 487 mA |
| Typical Power Dissipation | 6.9 W |
| Maximum Power Dissipation | Approx. 11.4 W |
| Ethernet | 2 × RJ45 Control Network ports |
| Serial Interfaces | 2 × RJ45 serial ports |
| CEX Bus | Supported |
| ModuleBus | Supported |
| RCU-Link | Supported |
| Backup Battery | 4943013-6 |
| Baseplate | TP830, 115 mm |
| Protection | IP20 |
| Net Weight | Approx. 1.2 kg |
| Lifecycle | Classic |
The PM864AK01 package includes the PM864A CPU, TP830 baseplate, TB850 CEX-bus terminator, TB807 ModuleBus terminator, TB852 RCU-Link terminator, memory-backup battery, and power plug.
Product Introduction
ABB PM864AK01 AC 800M Processor Unit
The ABB PM864AK01 (3BSE018161R1) is a central processor unit kit for the AC 800M controller platform used within System 800xA installations. It provides the CPU and memory resources required to execute controller applications while interfacing with Control Network, CEX-Bus, ModuleBus, and associated communication hardware.
The important specification for legacy-system work is its 96 MHz MPC862 processor and 32 MB memory architecture. CPU redundancy is supported, with ABB documentation specifying a maximum redundant switchover time of 10 ms.
PM864AK01 3BSE018161R1
Application Scenarios & Field Pitfalls
Engineering Pain Point
A failed PM864A CPU is not simply a matter of replacing a generic PLC processor. The controller participates in the AC 800M hardware architecture, including CEX-Bus, ModuleBus, communication interfaces, and CPU redundancy.
The biggest procurement mistake is ordering by the family name alone. PM861A, PM864A, PM862 and PM866A are not interchangeable merely because they belong to AC 800M. ABB has introduced newer replacement controllers for the PM861A/PM864A generation, and the applicable 800xA version must be checked before migration.
Typical Applications
- Process DCS: Central controller for continuous process-control applications.
- Power and utilities: Controller applications requiring redundant CPU architecture.
- Chemical and petrochemical plants: AC 800M-based regulatory and sequence control.
- Legacy System 800xA installations: Replacement of PM864A processor units where the existing engineering environment remains in service.
Technical Pitfalls to Avoid
- Verify the complete kit, not just the CPU.
PM864AK01 is a processor-unit kit. ABB’s package definition includes TP830 and multiple bus terminators plus the memory backup battery. A loose PM864A CPU is not necessarily equivalent to a complete 3BSE018161R1 kit. - Do not confuse PM864AK01 with PM864AK02.
The K01 version contains one CPU, while K02 is the redundant two-CPU configuration. ABB’s controller documentation lists 3BSE018161R1 for and 3BSE018164R1 for PM864AK02. - Check the controller redundancy architecture before startup.
The supports CPU redundancy, including synchronization through the RCU-Link architecture. ABB specifies a maximum 10 ms switchover time in redundant configuration. - Check the 800xA / Control Builder version before migration.
The is now classified by ABB as Classic, and ABB documents newer PM862/PM866A-family replacements. A hardware replacement may therefore be straightforward, while a controller migration can require software and version checks. - Do not ignore the battery.
The kit includes battery 4943013-6 for memory backup. For an old spare that has spent years in storage, battery condition deserves inspection before putting the unit into service.
Related Products
- PM864AK02 — 3BSE018164R1
Two-CPU redundant version of the processor-unit family. Appropriate when the existing controller architecture uses a redundant processor pair. - — 3BSE018165R1
The processor itself rather than the complete kit. Useful when the existing TP830 baseplate and associated termination hardware are being retained. - PM861AK01 — 3BSE018157R1
Earlier AC 800M processor unit with 48 MHz CPU and 16 MB memory. Same broad controller family, but lower processing and memory capacity. - PM862K01 — 3BSE076940R1
ABB-listed replacement for in the System 800xA lifecycle documentation. It uses a different processor generation, so software and hardware compatibility must be checked before substitution. - PM866AK01
Newer AC 800M processor family intended for applications where migration away from Classic hardware is appropriate. Do not treat it as a blind plug-in replacement. - TP830
The 115 mm baseplate included in the kit. It provides the physical platform for the processor and associated controller connections. - TB850
CEX-Bus terminator included with the kit. It is part of the processor-unit package rather than an independent replacement CPU. - TB807
ModuleBus terminator supplied with the package. Its presence matters when rebuilding the complete controller assembly.
Procurement note: Specify ABB , 3BSE018161R1, Processor Unit Kit. If the requirement is for a complete replacement, confirm that the quoted assembly includes + TP830 + TB850 + TB807 + TB852 + 4943013-6 battery + power plug. For a live 800xA system, also record the current controller firmware, Control Builder version, redundancy arrangement, and installed communication modules before approving a newer PM-series replacement.
