ABB PM866K01 3BSE050198R1 | AC 800M Processor Unit

ABB PM866K01 3BSE050198R1 | AC 800M Processor Unit

  • Model: PM866K01
  • Part Number: 3BSE050198R1
  • Brand: ABB
  • Series: AC 800M / System 800xA
  • Core Function: Executes control logic and manages communication with connected AC 800M I/O and control-network hardware.
  • Product Type: Processor Unit Kit
  • Key Specs: 133 MHz CPU; 64 MB memory; 2 Ethernet ports; supports controller redundancy.
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Category: SKU: ABB PM866K01 3BSE050198R1

Description

Key Technical Specifications

Parameter Specification
Product Model PM866K01
Product ID 3BSE050198R1
Manufacturer ABB
Product Family AC 800M
System Platform System 800xA
Product Type Processor Unit Kit
Processor MPC866, 133 MHz
Memory 64 MB
Ethernet 2 ports
Ethernet Standard IEEE 802.3 / 10/100 Ethernet architecture
Serial Interfaces COM3 / COM4
Power Supply 24 V DC nominal
ModuleBus Supported
CEX-Bus Supported
CPU Redundancy Supported with appropriate redundant configuration
Baseplate TP830, 115 mm
Memory Backup Battery included in standard kit
Operating Temperature Typically 0 to +55°C
Protection IP20

ABB’s official System 800xA documentation identifies PM866K01 / 3BSE050198R1 as a processor unit containing a PM866 CPU rated at 133 MHz and 64 MB. The same documentation lists the PM866K01 kit components, including the TP830 baseplate and the CEX-, ModuleBus-, and RCU-Link terminators.

The controller architecture provides two Ethernet interfaces and supports communication through the AC 800M control architecture. Available technical documentation also identifies ModuleBus capacity and controller redundancy functions for PM866-based systems.

One procurement detail deserves attention: ABB’s lifecycle documentation currently classifies PM866K01 as Limited, with a replacement available, while PM866AK01 is listed as Active in the same hardware lifecycle records. That makes revision and migration planning important for long-running installations.

 

Application Scenarios & Pain Points

A controller CPU replacement is rarely just “remove the old one and insert the new one.” The real risk sits in the application image, firmware compatibility, Ethernet configuration, redundancy state, and retained data.

  • System 800xA process control: PM866K01 provides the processing platform for AC 800M control applications where PLC logic, I/O handling, and control-network communication must remain coordinated.
  • Legacy AC 800M maintenance: A useful spare for plants maintaining existing PM866-based controllers rather than immediately migrating the entire control strategy.
  • Redundant controller installations: Two compatible processor units can be configured for controller redundancy, provided the surrounding redundancy hardware and software configuration are appropriate.
  • DCS/PLC migration projects: The PM866K01 can be encountered during staged System 800xA upgrades where older controller hardware remains in service while other parts of the control system are modernized.

Field note: Before removing the old CPU, capture the controller configuration, firmware revision, Ethernet identity, application backup, and battery condition. A replacement that boots cleanly but lacks the correct application image is not a successful replacement.

PM866K01

Related Products

  • ABB PM866AK01 3BSE076939R1 — The newer PM866A-based processor unit identified by ABB as an active replacement for in the lifecycle documentation. Compatibility still needs to be checked against the installed application and hardware revision.
  • ABB PM866K02 3BSE050199R1 — Redundant processor-unit package containing two units plus the associated CEX-Bus and RCU-Link cabling. This is intended for redundant controller architectures rather than a single CPU installation.
  • ABB PM864AK01 3BSE018161R1 — Earlier AC 800M processor family member with lower processor and memory specifications. It may appear in older installations but should not be treated as a drop-in replacement for .
  • ABB PM891K01 3BSE053241R1 — Higher-tier AC 800M processor unit used in newer/high-performance controller architectures. The surrounding hardware and application requirements determine whether migration is practical.
  • ABB TP830 — 115 mm baseplate included in the processor-unit kit. It provides the physical mounting and controller backplane interface for the processor assembly.
  • ABB TB850 — CEX-Bus terminator included with the kit. It belongs to the controller’s CEX-Bus infrastructure and should not be confused with the ModuleBus terminator.
  • ABB TB807 — ModuleBus terminator included in the standard package. It is associated with the local ModuleBus arrangement used for I/O connectivity.
  • ABB TB852 — RCU-Link terminator supplied with the kit for the redundant-controller communication arrangement.

 

The Engineer’s Guide: Field Pitfalls to Avoid

⚠️ Do not confuse with PM866AK01.

The model names are extremely close, but they are different product identifiers. ABB currently lists / 3BSE050198R1 as Limited and PM866AK01 / 3BSE076939R1 as Active.

How to avoid it: Match the complete product ID, installed firmware, application environment, and ABB migration documentation before substituting the newer unit.

⚠️ Do not replace the CPU without securing the application and configuration first.

The processor hardware alone does not recreate the running controller. Application logic, controller configuration, communication settings, and retained data must be accounted for.

How to avoid it: Take a verified Control Builder/application backup and document the existing controller configuration before removing the processor.

⚠️ Watch the battery and retained-memory condition.

The kit includes a battery for memory backup. A replacement CPU with an old or depleted backup battery can create a second maintenance problem shortly after installation.

How to avoid it: Check the battery status and replace it according to the applicable ABB maintenance procedure.

 

Frequently Asked Questions (FAQ)

What is ABB 3BSE050198R1?

is an ABB AC 800M processor unit kit for System 800xA. ABB specifies a PM866 CPU running at 133 MHz with 64 MB memory.

What is included with the kit?

ABB’s catalog lists:

  • PM866 CPU
  • TP830 baseplate
  • TB850 CEX-Bus terminator
  • TB807 ModuleBus terminator
  • TB852 RCU-Link terminator
  • Memory-backup battery

Always verify the seller’s actual package contents because individual surplus or refurbished units may be supplied differently.

Can be replaced directly by PM866AK01?

Not blindly. ABB identifies PM866AK01 as an active replacement path for the limited , but the application software, firmware, hardware configuration, and migration requirements must be checked first.

Does support redundant CPU operation?

Yes. The AC 800M architecture supports processor redundancy, and ABB offers PM866K02 as a redundant processor package containing two units with the required interconnection hardware.

What should I check when buying a replacement ?

Check these items before accepting the unit:

  1. model marking.
  2. 3BSE050198R1 product ID.
  3. CPU and memory specification.
  4. Firmware revision.
  5. TP830 baseplate condition if supplied as a kit.
  6. Battery condition.
  7. Ethernet port condition.
  8. Controller diagnostic history.
  9. Functional test evidence.
  10. Whether the supplied unit is a complete kit or CPU-only assembly.

Is still an active ABB product?

ABB’s hardware lifecycle documentation currently lists as Limited, with a replacement available, rather than Active. is shown as Active in the same documentation.

For a plant with multiple PM866 controllers, this is worth treating as a lifecycle-management issue rather than waiting until the last spare is consumed.

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