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ABB PM866 AC 800M Processor Unit

The ABB PM866 (3BSE050200R1), also cataloged as the PM866 Processor Unit, operates as a dedicated CPU component for control logic execution, data processing, and communication management within the ABB AC 800M controller platform.

Hardware Specifications

Parameter	Specification
Model	PM866
Brand	ABB
Product Type	Processor Unit / CPU
Series	AC 800M
Catalog Number	3BSE050200R1
Origin	Sweden
Operating Temp	0 deg C to +55 deg C
Power Consumption	Not specified
Power Supply	24 VDC (19.2 to 30 VDC)
Processor Performance	High-speed CPU execution for AC 800M control applications
System Memory	64 MB RAM (configuration dependent)
Backup Memory	Supports backup memory options depending on configuration
Ethernet Communication	2 x Ethernet ports for control network and MMS communication
Serial Communication	1 x RS-232C serial port with RJ-45 interface and optical isolation
Expansion Interface	CEX bus interface for communication and expansion modules
Protection Class	IP20, cabinet installation required
Redundancy Support	Supports CPU redundancy with compatible hardware and licenses

Profinet and Industrial Control Communication Characteristics

The ABB PM866 integrates with the AC 800M controller architecture through internal backplane and communication interfaces. Therefore, it provides deterministic processing for PLC and DCS control tasks.

The processor manages application execution, I/O communication cycles, and system diagnostics. In addition, firmware compatibility defines available communication functions and controller configuration options.

The AC 800M platform supports scalable I/O density through compatible S800 I/O modules and communication interfaces. The PM866 exchanges control data through Ethernet-based industrial networks while maintaining synchronized controller operations.

Frequently Asked Questions

Q: Does the ABB PM866 support CPU redundancy operation?

A: Yes. The PM866 supports CPU redundancy configurations when used with compatible AC 800M hardware components, software licenses, and system configuration settings.

Q: What power supply does the PM866 require?

A: The PM866 requires a 24 VDC power supply input. The specified operating range is 19.2 to 30 VDC.

Q: Which communication interfaces are available on the PM866?

A: The PM866 provides two Ethernet ports for control network communication, one isolated RS-232C serial port, and a CEX bus interface for expansion modules.

Field Installation Guidelines

Install the PM866 in an AC 800M controller cabinet with appropriate mechanical protection and environmental control.

Connect the 24 VDC power supply according to ABB wiring requirements. Verify polarity before energizing the controller.

Use shielded communication cables for Ethernet and serial connections. Ground cable shields according to site grounding practices to reduce electromagnetic interference.

Maintain proper separation between power wiring and communication cables. Avoid routing signal cables parallel to high-current switching circuits.

Before commissioning, verify firmware compatibility, controller configuration parameters, and communication status through the ABB engineering software environment.

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