Description

ABB PM858K01 Processor Unit

The ABB 3BSE082895R1 (PM858K01), also cataloged as the PM858K01 Processor Unit, operates as a dedicated hardware component for control execution and communication management within ABB AC 800M controller platforms. It provides MPC866-based processing, memory handling, Modulebus management, and Ethernet control network communication.

Hardware Specifications

Parameter	Specification
Model	PM858K01
Article Number	3BSE082895R1
Brand	ABB
Product Type	Processor Unit
System Platform	ABB AC 800M
Origin	Sweden
Processor Type	MPC866
Clock Frequency	33 MHz
Memory	16 MB
RAM Available for Application	7.147 MB
Flash Memory for Storage	Yes
Firmware Storage	4 MB Flash PROM
Weight	1200 g (including base)
Dimensions	119 mm W x 186 mm H x 135 mm D
Operating Temp	0 to +55 deg C
Storage Temp	-40 to +70 deg C
Power Supply	24 VDC (19.2-30 VDC)
Power Consumption	210 mA typical / 360 mA maximum at +24 VDC
Power Dissipation	5.1 W typical / 8.6 W maximum
Redundancy	No
High Integrity	No
Performance	0.36 ms per 1000 boolean operations
Applications per Controller	32
Programs per Application	64
Diagrams per Application	128
Tasks per Controller	32
Cycle Times	32 selectable cycle times
Minimum Application Cycle Time	Down to 1 ms
Ethernet Channels	2
Ethernet Interface	IEEE 802.3 Ethernet, 10 Mbit/s, RJ-45 female
Control Network Protocol	MMS and IAC
Recommended Network Backbone	100 Mbit/s switched Ethernet
RS-232C Interfaces	2
Modulebus Capacity	Maximum 96 I/O modules with single PM866 configuration
CEX Bus Communication Modules	Maximum 12
CEX Bus Supply Current	Maximum 2.4 A
Clock Synchronization	1 ms between AC 800M controllers by CNCP protocol
Event Queue Capacity	Up to 3000 events per OPC client
Protection Class	IP20 according to EN 60529

ABB AC 800M Industrial Control Communication

The PM858K01 uses ABB controller communication architecture to manage application execution, I/O data exchange, and engineering interfaces. The processor supports Ethernet-based control communication through two RJ-45 interfaces and provides MMS and IAC protocols for controller-level data exchange.

Furthermore, the unit supports Modulebus expansion with electrical and optical I/O clusters. The Modulebus scan interval operates from 0 to 100 ms depending on the connected I/O module quantity. This structure allows I/O density scaling within AC 800M automation configurations.

The firmware storage uses integrated Flash PROM technology, while application data remains stored in controller memory. Additionally, the built-in lithium backup battery maintains clock functions during power interruptions.

Backplane Bus Communication and Firmware Flash Compatibility

The ABB PM858K01 manages internal controller communication through the AC 800M hardware architecture. Its CEX bus interface supports communication modules, while Modulebus connections provide access to distributed I/O components.

The controller maintains firmware compatibility through onboard Flash PROM storage. Therefore, engineering tools can manage application execution parameters, controller configurations, and firmware-related functions within the supported AC 800M environment.

The processor provides deterministic execution performance with a 0.36 ms processing time for 1000 boolean operations. Consequently, applications can execute cyclic control tasks with configurable timing intervals down to 1 ms.

Frequently Asked Questions

Q: Does the PM858K01 support redundant controller operation?
A: No. The PM858K01 is specified as a non-redundant processor unit. Redundant controller configurations require compatible redundant processor models.

Q: What communication interfaces are integrated into the PM858K01?
A: The unit includes two Ethernet channels and two RS-232C interfaces. One RS-232C port supports general communication, while the other supports service tool connection.

Q: How many I/O modules can the PM858K01 handle through Modulebus?
A: A single PM858K01 controller configuration supports up to 96 I/O modules through Modulebus, depending on the installed I/O architecture.

Field Installation Guidelines

Install the PM858K01 on the designated AC 800M controller mounting base according to ABB hardware installation procedures.

Ensure that the 24 VDC power supply remains within the specified operating range before energizing the controller. Verify correct polarity and protective grounding connections during wiring.

Route Ethernet and RS-232C communication cables separately from high-voltage power conductors to reduce electromagnetic interference. Use appropriate shield termination methods for communication cables according to site electrical standards.

Before commissioning, confirm firmware compatibility, controller configuration parameters, Modulebus connections, and I/O addressing through the approved ABB engineering tools.

Specifications

• Brand: ABB

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems