ABB PM857K02 (3BSE088386R1) – High‑performance AC 800M controller kit for 800xA process control

The ABB PM857K02 is part of the AC 800M family, designed for demanding process and factory automation under ABB 800xA. From my experience, PM857-based kits are chosen when plants need faster cycle times than entry models and want a clear path to CPU redundancy. You might notice that it slots neatly into existing AC 800M installations, supports large applications, and keeps engineering simple with IEC 61131‑3 in Control Builder M.

Company’s Order Placement Process and Guarantees

• Warranty period: 365 days
• Delivery: 1 week for in-stock items; no more than one month at the latest
• Payment: 50% advance payment; full payment prior to delivery
• Express options: FedEx, UPS, DHL
• Every unit is function-checked prior to dispatch and packed for industrial transport

Key Features

• AC 800M performance tier (PM857) – Suited for medium-to-large control tasks with fast scan times in 800xA environments.
• Redundancy-ready architecture – Typically supports CPU redundancy when paired with SM810/SM811, minimizing downtime during switchover.
• Dual Ethernet for control networks – Two 10/100BASE‑T ports for controller/plant networks, making segregated or redundant topologies straightforward.
• No on-board I/O – Uses S800 I/O and dedicated communication modules, which tends to simplify cabinet wiring and expansion.
• IEC 61131‑3 programming – Control Builder M with ladder, function block, structured text, and libraries familiar to most 800xA teams.
• Deterministic task handling – Stable cycle times and prioritized tasks for process-critical logic.
• Robust 24 VDC operation – Designed for industrial cabinets; fanless, low noise, and typically maintenance-light.
• Time synchronization support – Works with plant NTP/SNTP sources to align events and diagnostics across the system.

Technical Specifications

Quick field note: A refinery maintenance lead told us the PM857 class “seems to be the sweet spot when you don’t need the very top-end CPU but still want redundancy and fast logic for sequence control.”

Related or Supporting Products

• PM856K01 – Similar family, typically lower performance and memory than PM857; good for mid-size tasks.
• PM851K01 – Entry AC 800M tier for smaller applications.
• PM861 / PM864 / PM865 – Higher-performance AC 800M controllers for very large applications or more intensive I/O.
• SM810 / SM811 – Synchronization modules for CPU redundancy with AC 800M.
• CI854A – PROFIBUS DP interface for S800 I/O and field devices.
• CI871 – PROFINET interface when Ethernet-based field I/O is preferred.
• CI869 – IEC 61850 communication for substation/utility integration.
• S800 I/O (e.g., AI810, AO810, DI810, DO810) – Modular I/O families commonly used with AC 800M.

Installation & Maintenance

• Cabinet & environment – Mount on a grounded DIN rail in a clean, dry, vibration-controlled cabinet. Maintain ambient 0–55°C with adequate ventilation; avoid mixing high-voltage and signal wiring in the same duct.
• Power & grounding – 24 VDC regulated supply with protective earth. Isolate controller power with a dedicated breaker and provide surge protection on the DC line in many cases.
• Network topology – Use shielded CAT5e/6 for the two Ethernet ports; separate control and plant networks if possible. Managed switches help with redundancy and diagnostics.
• I/O expansion – Add S800 I/O via supported fieldbuses (e.g., PROFIBUS, PROFINET) using the appropriate CI modules. Keep segment lengths and termination per ABB guidelines.
• Safety – De-energize before handling modules; observe ESD precautions. Verify correct firmware/hardware compatibility before commissioning.
• Routine maintenance – Back up application and controller parameters periodically, check event logs, and plan firmware updates during scheduled outages. Light dust cleaning and connector re-seating typically improve long-term reliability.

Quality & Certifications

• CE compliant; RoHS compliant
• UL/cUL certifications apply to most AC 800M variants
• Manufactured under ISO 9001 quality systems
• Manufacturer’s standard warranty practices apply; our supply warranty is 365 days