The ABB PM861K01 (3BSE018105R1) is a high-integrity, industrial-grade Processor Unit Kit designed for the AC 800M controller family within the ABB Ability™ System 800xA and Compact Product Suite. Operating as the primary computational engine for localized automation loops, the PM861 processor excels at executing complex control strategies, processing high-density I/O routing, and managing peer-to-peer communications over industrial control networks.
This comprehensive kit packages the core processor hardware with the essential base components required for seamless installation onto a standard ModuleBus backplane cluster.
Product Specifications
Technical Parameters
- Model Identification: PM861K01
- Product ID: 3BSE018105R1
- Manufacturer: ABB
- Processor Type: 32-bit RISC micro-controller (operating at 24 MHz)
- Onboard Memory capacity: 16 MB non-volatile Flash / RAM configuration
- Performance Metrics: ~0.25 ms execution time per 1,000 boolean instructions
- Maximum I/O Capacity: Supports up to 12 direct S800 I/O modules on the electrical ModuleBus; expandable up to thousands of points via optical ModuleBus or PROFIBUS DP.
- Primary Logic Input Power: 24V DC (19.2V to 30V DC operating window)
- Power Dissipation Profile: 5.5 Watts (Typical operating threshold)
- Built-In Communications: 2x RJ-45 Ethernet Ports (Control Network), 2x RS-232C Serial Ports (Channels for Modbus RTU, Comli, or programming).
Kit Components (What’s in the Box)
- PM861: Core Processor Unit
- TP830: Compact ModuleBase (Provides backplane mounting and base termination slots)
- TK807: RJ-45 Serial Programming Cable
- TB807: ModuleBus Terminator block
- Battery: Long-life backup battery (for memory retention during total power dropouts)
Physical Datasheet
- Dimensions (W × H × D): 119 mm x 186 mm x 135 mm (Standard AC 800M profile)
- Net Kit Weight: 1.2 kg (2.65 lbs)
- Country of Origin: Sweden
- Ingress Protection Rating: IP20 (according to IEC 60529)
- Operating Temperature Limits: +5°C to +55°C (+41°F to +131°F)
Application Fields
The PM861K01 is used to manage dynamic control nodes across various processing sectors:
- Chemical & Pharmaceutical Plants: Executing precision batch control sequences in compliance with ISA-88 standards.
- Pulp & Paper Mills: Synchronizing wet-end logic, drying line monitoring, and heavy continuous roller feeds.
- Water & Wastewater Management: Controlling remote pumping stations and aeration tanks over distributed serial/Ethernet networks.
- Marine & Offshore Automation: Serving as a reliable controller for vessel power management systems and cargo handling layouts.
Product Usage Instructions
- Base Installation: Snugly mount the TP830 ModuleBase onto a standard 35mm DIN rail inside your electrical enclosure. Verify that the grounding clip on the back of the base forms a low-resistance contact with the metal rail.
- Module Engagement: Line up the PM861 Processor Unit with the guide rails of the TP830 base. Push downward until the integrated side locking clips engage completely, securing the electrical backplane connections.
- Network Setup: Utilize the dual RJ-45 Ethernet ports (labeled CN1 and CN2) to form a redundant connection to your System 800xA Control Network. If redundancy isn’t required, CN1 serves as the primary data route.
- Battery Activation: Insert the enclosed backup battery into its front-accessible compartment before powering up the unit. This battery ensures that your compiled application code and configuration parameters remain intact during unexpected plant power blackouts.
- Programming Interface: Connect the TK807 cable from your engineering laptop to the processor’s tool port. Use ABB Control Builder M software to map firmware parameters, initialize IP addresses, and download your IEC 61131-3 logic programs.
Q&A – Frequently Asked Questions
Q: What is the primary difference between the PM861K01 and the higher-tier PM864K01? A: The PM861K01 is built for mid-sized automation tasks, featuring a 24 MHz clock speed and 16 MB of memory. The PM864K01 operates at a higher frequency (96 MHz) and features 32 MB of memory, making it better suited for ultra-high-density I/O arrays or intensive processing tasks.
Q: Can I use the PM861K01 in a redundant controller pair? A: No. The PM861 processor does not natively support CPU-level hardware redundancy. If your application demands a dual-CPU “bumpless” backup setup, you must use the PM862, PM865, or PM866 processor modules alongside specialized RCU (Redundant Control Unit) cables.
Q: How do I know when the memory backup battery needs to be replaced? A: The front panel of the PM861 features a dedicated BATT LED. A solid or flashing amber light flags a low-battery state, indicating you should swap out the cell while the system is powered up to avoid losing runtime data.
Q: Where can I get current pricing, stock availability, or a formal quote? A: For live logistics tracking, competitive pricing sheets, and 12-month replacement warranties on new or refurbished parts kits, please send an inquiry through our ABB AC 800M PM861K01 Procurement Portal.
Product Related News
In mid-2026, the ABB PM861K01 remains an essential maintenance and expansion asset for industrial plants operating System 800xA architectures. While ABB has expanded its premium line with the high-performance PM891 series, the PM861K01 continues to experience strong demand within the lifecycle support framework. This popularity stems from its ability to easily handle targeted, decentralized processing upgrades without forcing plants into a complete, costly restructuring of their underlying network topology. Automation engineers regularly select this processor kit when partitioning complex, growing control environments into distinct sub-loops, which isolates localized signal traffic and improves overall system availability scores.
