ABB PM858 (3BSE093350R1) – High‑performance AC 800M CPU for Demanding Process Control and Seamless System Upgrades

• Warranty: 365 days

• Lead time: Typically 1 week if in stock; no more than one month at the latest

• Payment: 50% advance payment, full balance prior to delivery

• Shipping: Express options via FedEx, UPS, or DHL

• AC 800M platform compatibility: Fits standard AC 800M bases for straightforward drop‑in installation.

• Robust processing for complex control: Typically used in mid‑to‑large control tasks where stable scan times and deterministic performance matter.

• Dual Ethernet for system and plant networks: 2× 10/100Base‑T ports (RJ45) for controller networking, HMI/SCADA, historians, or peer‑to‑peer links.

• CEX‑bus expansion: Add communication interfaces such as PROFIBUS DP, PROFINET, or EtherNet/IP to match installed field devices.

• Redundancy-ready architecture: In most cases, can be used with a synchronization module to build a hot‑standby redundant pair.

• Works with S800 I/O: No onboard I/O—connects to distributed S800 I/O for flexible analog/digital channel mix and cabinet layout.

• Service/maintenance friendly: Clear diagnostics via engineering tools; firmware updates and backups are typically quick and low‑risk.

The PM858 is commonly deployed in continuous and batch processes where dependable control and long lifecycle support are priorities. Typical use cases include:

• Oil & gas—compressor stations, separation trains, and produced‑water treatment

• Chemicals & petrochem—reactors, distillation, utilities integration

• Power & water—boiler/HRSG balance of plant, desalination, water treatment

• Pulp & paper—stock preparation, machine controls, and drives coordination

• Mining & metals—conveyors, grinding circuits, thickening and filtration

• Food & beverage—CIP/SIP skids, batching, packaging islands

One thing I appreciate is how easily it ties into mixed networks—plants often keep legacy PROFIBUS on one side and newer Ethernet protocols on the other without drama.

• Reliability you can quantify: Mature AC 800M platform with proven MTBF in heavy industry—typically fewer nuisance trips and cleaner maintenance planning.

• Compatibility and lifecycle: Works with S800 I/O and a wide set of ABB/third‑party networks via CEX modules, reducing retrofit risk and sparing complexity.

• Redundancy options: Redundant CPU architecture helps cut unplanned downtime costs where continuous operation is critical.

• Total cost control: Reuse existing I/O and cabinets; engineering tools and libraries are widely available, which usually trims commissioning hours.

• Technical support ecosystem: Large installed base means faster answers—both from ABB channels and experienced system integrators.

• Cabinet & mounting: Install on the AC 800M base in a grounded, ventilated cabinet. Follow spacing guidelines for heat dissipation and service access.

• Power & wiring: 24 V DC industrial supply; segregate Ethernet and fieldbus from high‑voltage cabling. Use shielded twisted pair for serial, Cat5e/6 for Ethernet.

• Environmental: Operate within 0…55 °C; keep humidity non‑condensing. Avoid corrosive atmospheres or use appropriate cabinet protection.

• Safety & ESD: De‑energize before insertion/removal. Use ESD protection when handling the CPU or CEX modules.

• Routine maintenance: Periodically back up the application, check event logs, verify firmware/engineering tool alignment, and inspect connectors for oxidation or looseness.

• Firmware & redundancy checks: When used redundantly, confirm both CPUs run the same firmware/application and verify sync status after updates.

You might notice that minor firmware updates often clear up intermittent diagnostics; customers have told me a scheduled update plus a quick network health check typically stabilizes comms after brownouts.

• Synchronization module: SM812 for redundant CPU configurations

• Communication interfaces: CI854A (PROFIBUS DP), CI857 (PROFINET IO), CI871 (EtherNet/IP)

• I/O system: S800 I/O families for distributed analog/digital modules

• Base units: SD82x series AC 800M controller bases for DIN‑rail mounting

• CE marked; designed for industrial EMC and safety requirements

• UL certification typically available for AC 800M modules

• RoHS compliant construction

• Manufacturer’s warranty: 12 months (we provide 365‑day warranty on supply)