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The PM856AK01 (3BSE018128R1) is a versatile processor unit kit from the ABB AC 800M series, engineered for deterministic control in industrial applications. Combining a powerful 32-bit RISC processor with efficient memory management, this kit is designed to handle complex control algorithms and large-scale I/O clusters, ensuring stable and reliable operation in demanding environments.
Manufacturer: ABB
Series: AC 800M
Model: PM856AK01
Part Number: 3BSE018128R1
Product Type: Processor Unit Kit (CPU + Baseplate)
Microprocessor: 32-bit RISC
Internal RAM: 16 MB
Onboard Flash: 4 MB
Interfaces: 2x RJ45 Ethernet, 2x RS-232, 1x ModuleBus
Nominal Voltage: 24 V DC (19.2 – 30 V DC)
Mounting: 35mm Standard DIN rail
Dimensions: 186 mm x 119 mm x 135 mm
Weight: 1.25 kg
Protection Rating: IP20
High Availability: Supports redundant configurations, enabling bumpless failover to eliminate single points of failure and ensure zero downtime during hardware transitions.
Network Reliability: Integrated dual Ethernet ports facilitate redundant communication paths, ensuring secure and consistent data exchange with HMI and engineering workstations.
Deterministic Performance: The efficient 32-bit core maintains consistent cycle times, essential for intensive regulatory and sequence logic tasks.
Industrial Durability: Features a fanless design for long-term stability and is optimized for use in manufacturing and power generation facilities.

Quick dispatch from our global inventory to reduce downtime and ensure uninterrupted operations.
All parts are sourced from reputable manufacturers and undergo thorough quality checks.
Extensive stock of industrial automation and discontinued parts, ready for immediate shipment.
Every product — including obsolete items — is covered by a 12-month warranty and 30-day return guarantee.
All product names, trademarks, brands, and logos mentioned on this website are the property of their respective owners.These names and trademarks are used for identification and reference purposes only.We are an independent supplier of industrial automation spare parts.We are not an authorized distributor, dealer, or representative of any manufacturer.Products supplied may include surplus inventory or unused items.We do not claim any affiliation with or endorsement by the original manufacturers.