ABB PM867K02 Redundant Processor Unit HI for High-Integrity Control

Product Overview

When process uptime and safety are non-negotiable, the ABB PM867K02 Redundant Processor Unit HI delivers a certified high-integrity control solution. This processor unit combines dual CPUs, redundant communication interfaces, and SIL3 certification to minimize costly downtime while meeting strict safety standards. With a 133 MHz clock frequency and 64 MB memory, it handles complex control tasks efficiently, reducing the total cost of ownership through improved reliability and reduced maintenance interventions.

Technical Specifications Breakdown

Processor and Memory

• Clock Frequency: 133 MHz
• Memory: 64 MB (46.559 MB available for application)
• Processor Type: MPC866
• Performance: 0.09 ms for 1000 boolean operations

These specs translate to fast logic execution, enabling tighter process control and faster response to safety events. The ample application memory supports complex programs without requiring additional hardware, saving on expansion costs.

Power and Redundancy

• Power Supply: 24 V DC (19.2-30 V DC)
• Power Consumption: 210 mA typical, 360 mA max at +24 V
• Power Dissipation: 5.1 W typical, 8.6 W max
• Redundancy: Yes, with switchover time max 10 ms

Redundancy ensures that a single CPU failure does not halt production. The low power dissipation reduces heat load in cabinets, potentially lowering cooling costs over the system life.

Environmental and Certifications

• Operating Temperature: 0 to +55 °C
• Protection Class: IP20
• Certifications: CE Mark, TUV Approval, ISA Secure certified
• Safety: High integrity, certified for SIL3

SIL3 certification allows deployment in safety-critical applications without separate safety controllers, consolidating hardware and reducing installation complexity.

Industry Applications

Chemical Processing

In chemical plants, the PM867K02 manages batch reactions requiring SIL3-rated emergency shutdown. Its redundant CPUs ensure that a single processor fault does not interrupt safety monitoring, preventing costly product loss and environmental incidents.

Oil and Gas

For offshore platforms, the unit handles fire and gas detection systems. The 0.09 ms performance and 10 ms switchover time maintain safety integrity even in harsh environments, reducing unplanned shutdowns that can cost millions per day.

Power Generation

In turbine control, the PM867K02 coordinates protection logic with business-critical control. The 64 MB memory supports large application programs, eliminating the need for additional controllers and lowering capital expenditure.

Installation and Setup Guidance

Mount the PM867K02 on a DIN rail in a clean, dry cabinet. Connect the 24 V DC power supply (19.2-30 V DC) to the designated terminals. Use the two RJ45 Ethernet ports (CN1, CN2) for Control Network connection. For high-integrity operation, add the SM812 module and configure according to the Safety Manual. Ensure compatibility with 800xA 6.0.2 and onwards. Verify that local organizations meet the required qualifications for safety system sales.

Maintenance and Reliability

Regularly inspect the two backup batteries (3.6 V lithium) and replace them per manufacturer guidelines to prevent memory loss. Monitor the redundant power supply status input for early warning of power issues. The IP20 protection requires keeping the enclosure free of dust and moisture. Following these steps extends service life and avoids unexpected replacement costs.

Compatibility and Integration

It supports up to 12 communication modules on the CEX bus and up to 96 I/O modules on the Modulebus (84 with redundant CPU). The Control Network uses MMS and IAC protocols over 100 Mbit/s switched Ethernet. This compatibility reduces integration effort and ensures smooth data exchange with existing infrastructure.

Selection Guide and Purchasing Advice

Before ordering, verify that your system runs 800xA 6.0.2 or later. The package includes two PM867 CPUs, two TP830 baseplates, two TB807 terminators, one TK850 CEX-bus cable, one TK851 RCU-Link cable, and two backup batteries. No license is included. Contact AutoDCSTech to confirm current lifecycle status and availability. Our team can help you select the right configuration for your application, ensuring you get the best value for your investment.