Overview
Configured for redundant controller execution in AC 800M Control Network systems, the ABB PM858K02 (PM858K02 Processor Unit) provides direct physical and electrical processing control for industrial automation applications.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PM858K02 |
| Article Number | 3BSE082896R1 |
| Brand | ABB |
| Product Type | Redundant Processor Unit |
| System Platform | AC 800M |
| Origin | Sweden |
| Weight | 2700 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 Consumption | 210 mA typ / 360 mA max at 24 V DC |
| Power Dissipation | 5.1 W typical / 8.6 W maximum |
| Processor Type | MPC866 |
| Clock Frequency | 33 MHz |
| Performance | 0.36 ms per 1000 boolean operations |
| Memory | 16 MB |
| RAM Available for Application | 7.147 MB |
| Firmware Storage | 4 MB Flash PROM |
| Flash Memory for Storage | Yes |
| Redundancy | Yes |
| High Integrity | No |
| Redundant Switch Over Time | Maximum 10 ms |
| Power Supply | 24 V DC (19.2 to 30 V DC) |
| Backup Battery | Lithium 3.6 V |
| Ethernet Interfaces | 2 channels, IEEE 802.3, 10 Mbit/s, RJ-45 |
| Control Network Protocol | MMS and IAC |
| RS-232C Interfaces | 2 ports |
| CEX Bus Communication Modules | Maximum 12 |
| Modulebus I/O Capacity | Maximum 96 I/O modules with single CPU configuration |
| Redundant CPU Modulebus Capacity | Maximum 84 I/O modules |
| Modulebus Scan Rate | 0 to 100 ms depending on I/O configuration |
| Applications per Controller | 32 |
| Programs per Application | 64 |
| Diagrams per Application | 128 |
| Tasks per Controller | 32 |
| Cycle Times | Up to 32 different cycle times |
| Minimum Program Cycle Time | Down to 1 ms |
| Operating Humidity | 5 to 95 %, non-condensing |
| Protection Class | IP20 according to EN 60529 |
| Isolation Voltage | 500 V AC |
| CE Mark | Yes |
| ISA Secure Certification | Yes |
ABB AC 800M Redundant Controller Architecture
The PM858K02 uses a redundant processor configuration within the ABB AC 800M controller family. Moreover, the module manages controller execution through dual Ethernet communication channels and supports MMS and IAC protocols for Control Network communication.
The processor uses an MPC866 CPU with 33 MHz clock frequency and provides 16 MB memory capacity. Therefore, it supports multiple applications, programs, diagrams, and task configurations within a single controller environment.
The redundant configuration provides controller switch-over performance with a maximum transition time of 10 ms. In addition, the unit supports synchronization between AC 800M controllers through the CNCP protocol with 1 ms clock synchronization accuracy.
Backplane Communication and Firmware Compatibility
The PM858K02 supports ABB AC 800M backplane communication through CEX Bus and Modulebus interfaces. The controller supports up to 12 communication modules on the CEX Bus and provides scalable I/O connections through Modulebus architecture.
Furthermore, the processor includes Flash PROM storage for firmware retention and supports firmware flash compatibility within the AC 800M controller platform. The hardware design allows integration with ABB I/O modules while maintaining defined bus scan timing according to connected module quantities.
The processor also supports industrial Ethernet communication through two RJ-45 ports. The Ethernet interface operates according to IEEE 802.3 standards and connects to recommended 100 Mbit/s switched Ethernet Control Network infrastructures.
Frequently Asked Questions
Q: Does the ABB PM858K02 support redundant controller operation?
A: Yes. The PM858K02 is designed for redundant AC 800M controller configurations and provides a maximum switch-over time of 10 ms in redundant operation.
Q: What power supply does the PM858K02 require?
A: The processor unit requires a 24 V DC supply with an operating range of 19.2 to 30 V DC. The typical current consumption is 210 mA and the maximum consumption is 360 mA.
Q: Which communication interfaces are integrated into the PM858K02?
A: The module integrates two Ethernet channels and two RS-232C interfaces. It supports MMS and IAC Control Network protocols for AC 800M system communication.
Field Installation Guidelines
Install the PM858K02 on the designated AC 800M controller mounting base and verify correct mechanical engagement before applying power.
Maintain proper separation between communication wiring and high-voltage power cables to reduce electrical interference. Connect protective grounding according to the controller cabinet design and maintain shield termination practices for communication cables.
Before commissioning, verify the 24 V DC supply polarity, voltage range, and redundant power status input connections. Confirm that connected CEX Bus modules, Modulebus I/O modules, and Ethernet network components match the configured controller hardware.
Operate the unit within the specified environmental limits, including temperature, humidity, vibration, and pollution degree requirements defined by IEC/EN 61131-2.
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