Process Automation Redundancy Solution – ABB PM858K02 | AC800M Series
Where This Product Is Used
The ABB PM858K02 Redundant Processor Unit is engineered for mission-critical industrial automation environments where uninterrupted process control is non-negotiable. Typical deployment scenarios include:
- Oil & Gas Plants – Upstream/downstream process control, compressor management, and pipeline SCADA systems requiring hot-standby redundancy.
- Power Generation & Utilities – Turbine control, boiler management, and grid-tie automation where a single CPU failure cannot be tolerated.
- Chemical & Petrochemical Facilities – Continuous batch process control with SIL-rated safety loops integrated into the AC800M architecture.
- Pulp & Paper Mills – High-speed coordinated drive and process control across distributed I/O racks.
- Water & Wastewater Treatment – 24/7 SCADA-integrated pump and valve sequencing with automatic CPU failover.
- Pharmaceutical Manufacturing – GMP-compliant process automation with audit-trail logging and redundant execution.
Technical Specifications
| Part Number / SKU | PM858K02 |
| Manufacturer | ABB |
| Series | AC800M (System 800xA) |
| Module Type | Redundant Processor Unit (CPU) |
| Redundancy Mode | Hot-standby (bumpless switchover) |
| Communication Interfaces | Ethernet (CEX-Bus), ModuleBus, redundancy link |
| Memory | Extended application memory for large control programs |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | -40 °C to +70 °C |
| Power Supply | Via AC800M baseplate (24 VDC system bus) |
| Weight | Approx. 1,100 g |
| Mounting | AC800M CPU rack / baseplate |
| Certifications | CE, UL, cUL, ATEX (zone 2 with appropriate enclosure) |
Why Engineers Specify This Model
- Bumpless Hot-Standby Switchover – The PM858K02 pairs with a second CPU module to deliver seamless failover with zero process interruption, critical for continuous operations.
- Native System 800xA Integration – Designed exclusively for ABB’s AC800M platform, ensuring full compatibility with 800xA DCS, Safety Manager, and Asset Optimization suites.
- Extended Memory Capacity – The K02 variant provides expanded program and data memory versus the base PM858, supporting larger and more complex control strategies.
- Deterministic Scan Times – Consistent cycle execution regardless of I/O load, essential for tight process loops in chemical and power applications.
- Long Product Lifecycle – ABB’s AC800M platform is actively supported with firmware updates and spare parts availability, protecting capital investment.
- Simplified Diagnostics – Integrated LED status indicators and 800xA asset monitoring enable rapid fault isolation without process shutdown.
Complete System Bill of Materials
A fully redundant AC800M controller node typically includes the following components alongside the PM858K02:
- ABB PM858K02 × 2 (primary + redundant CPU pair)
- ABB TB840A – ModuleBus Optical Port (for fiber I/O extension)
- ABB SD802F – Redundant Power Supply Module
- ABB CI854A / CI854B – PROFIBUS DP Communication Interface
- ABB CI857K01 – HART Communication Interface
- ABB AI810 / AO810 – Analog I/O Modules
- ABB DI810 / DO810 – Digital I/O Modules
- ABB AC800M CPU Rack / Baseplate
Contact support@konmask.com for complete BOM pricing and availability.
Compliance & Industry Standards
- IEC 61131-3 – Compliant programming environment (FBD, LD, ST, SFC, IL) via ABB Control Builder M.
- IEC 61508 / IEC 61511 – AC800M architecture supports SIL 1–3 safety applications when paired with ABB Safety Manager.
- CE Marking – Meets EU EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU.
- UL / cUL Listed – Recognized for use in North American industrial installations.
- ATEX Zone 2 – Suitable for installation in Zone 2 hazardous areas with appropriate certified enclosures.
- RoHS Compliant – Manufactured in accordance with EU Directive 2011/65/EU on restriction of hazardous substances.
Quality Assurance & Sourcing
At Konmask.com, every ABB PM858K02 unit is subject to a rigorous incoming inspection protocol before dispatch:
- Visual inspection for physical damage, corrosion, and counterfeit indicators.
- Firmware version verification against ABB’s official release matrix.
- Functional power-on test where applicable.
- Original ABB packaging and documentation preserved where available.
- Traceability records maintained for each unit (batch/lot reference).
We source exclusively from authorized distributors, certified surplus channels, and direct OEM relationships to ensure authenticity and reliability.
How to Source This Part
- Add to Cart – Click “Add to Cart” above and proceed to checkout for standard online ordering.
- Request a Quote – For volume orders (>3 units), OEM pricing, or project BOM support, email support@konmask.com.
- Urgent Requirement – Call or WhatsApp +0086 19859288691 for same-day stock confirmation and expedited shipping options.
- Lead Time – In-stock units ship within 1–3 business days. Ex-stock lead times for special orders are quoted individually.
- Export & Customs – We handle export documentation, HS code classification (HS 8537.10), and commercial invoices for international shipments.
Application-Specific FAQ
Q: Can the PM858K02 replace a PM858K01 directly?
A: The PM858K02 is the higher-memory variant. It is backward-compatible with PM858K01 racks and baseplates, but firmware and Control Builder M project settings should be verified before hot-swap replacement in a live system.
Q: How many I/O modules can one PM858K02 control?
A: A single AC800M CPU node supports up to 12 S800 I/O modules locally via ModuleBus, and hundreds of remote I/O modules via optical fiber extension (TB840A) or fieldbus interfaces.
Q: Is redundancy configuration automatic or manual?
A: Redundancy is configured in ABB Control Builder M software. Once configured, switchover between primary and standby PM858K02 units is fully automatic and bumpless.
Q: What is the typical MTBF for the PM858K02?
A: ABB rates AC800M processor modules at >200,000 hours MTBF under standard operating conditions (25 °C, continuous duty).
Q: Do you provide a warranty?
A: Yes. All units sold by Konmask.com carry a minimum 90-day functional warranty. Extended warranty options are available upon request.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
