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ABB PM858K01 Processor Module

The ABB 3BSE082895R1, also cataloged as the PM858K01 Processor Module, operates as a dedicated hardware component for application execution and control communication within ABB AC 800M controller platforms. The module integrates CPU processing, RAM memory, firmware storage, Ethernet communication, serial interfaces, and optional CPU redundancy support.

Hardware Specifications

Parameter	Specification
Model	PM858K01
Article Number	3BSE082895R1
Brand	ABB
Product Type	AC 800M Processor Module
Origin	Sweden
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 Temperature	-40 to +70 deg C
Power Consumption	210 mA typical at +24 VDC, 360 mA maximum
Power Supply	24 VDC (19.2-30 VDC)
Power Dissipation	5.1 W typical, 8.6 W maximum
Processor Type	MPC866
Clock Frequency	33 MHz
Application Memory	16 MB
RAM Available for Application	7.147 MB
Flash Memory	Yes, 4 MB Flash PROM for firmware storage
Boolean Operation Performance	0.36 ms per 1000 boolean operations
CPU Redundancy	Supported for CPU, CEX-Bus, communication interfaces and S800 I/O
Redundancy Switch Over Time	Maximum 10 ms
Applications per Controller	32
Programs per Application	64
Diagrams per Application	128
Tasks per Controller	32
Application Cycle Time	Down to 1 ms
Ethernet Channels	2
Ethernet Interface	IEEE 802.3 Ethernet, 10 Mbit/s, RJ45 female 8-pole
Control Network Protocol	MMS and IAC
Recommended Network Backbone	100 Mbit/s switched Ethernet
RS-232C Interfaces	2 ports
COM3 Interface	RS-232C, 75-19200 baud, full RTS-CTS support, non-isolated
COM4 Interface	RS-232C, 9600 baud, optically isolated, configuration tool connection
Modulebus Capacity	Maximum 96 I/O modules with single CPU configuration
Modulebus Scan Rate	0-100 ms depending on I/O configuration
CEX-Bus Communication Modules	12
CEX-Bus Supply Current	Maximum 2.4 A
Backup Battery	Lithium 3.6 V
Real-Time Clock Stability	100 ppm approximately 1 hour/year
Event Queue Capacity	Up to 3000 events per OPC client

Firmware Flash Compatibility and Industrial Communication

The PM858K01 uses firmware stored in Flash PROM memory and provides hardware resources for AC 800M control applications. The MPC866 processor executes controller tasks while maintaining communication through Ethernet and serial interfaces.

The controller supports deterministic communication through the Control Network using MMS and IAC protocols. In addition, the Ethernet interface provides connection capability for engineering tools, operator systems, and controller-to-controller data exchange.

The CPU architecture supports I/O density scaling through Modulebus communication. The controller can manage electrical and optical I/O clusters, while the CEX-Bus provides expansion capability for communication modules.

Frequently Asked Questions

Q: Does the PM858K01 support CPU redundancy configuration?
A: Yes. The PM858K01 supports redundancy functions for CPU processing, CEX-Bus communication, communication interfaces, and S800 I/O systems. The specified redundancy switch-over time is maximum 10 ms.

Q: What communication interfaces are integrated on the PM858K01 controller?
A: The controller includes two RJ45 Ethernet ports for Control Network communication and two RJ45 RS-232C serial ports. COM3 provides general serial communication, while COM4 provides an isolated service tool connection.

Q: What is the power requirement of the PM858K01?
A: The controller requires a 24 VDC supply with an operating range of 19.2-30 VDC. Power consumption is 210 mA typical and 360 mA maximum at 24 VDC.

Field Installation Guidelines

Install the PM858K01 on the compatible AC 800M base plate using the slide and lock DIN rail mounting mechanism. Verify that the base plate Ethernet address label remains accessible for network identification.

Connect the Ethernet ports using industrial Ethernet cabling with proper separation from high-voltage power conductors. Maintain correct shielding and grounding practices to reduce electromagnetic interference.

Connect RS-232C interfaces according to the assigned port function. COM3 supports standard serial communication with RTS-CTS signals, while COM4 provides isolated connection for configuration tools.

Before commissioning, verify the 24 VDC power supply polarity, grounding connection, backup battery condition, and communication link status through the controller diagnostic indicators.

Ensure installation conditions remain within the specified environmental limits, including temperature, humidity, vibration, and pollution degree requirements defined by IEC/EN 61131-2.

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