ABB PM800 Series Modules

Technical Dossier

Product Details And Specifications

ABB PM800 Series: Comprehensive Module Range and Technical Overview

The ABB PM800 Series is a core controller family within ABB's Freelance Distributed Control System (DCS) platform. Deployed across global heavy industry — including petrochemical refineries, nuclear auxiliary systems, offshore platforms, and continuous-process chemical plants — the PM800 architecture provides deterministic real-time control with high-availability redundancy options. Its installed base spans multiple decades of industrial automation infrastructure, making lifecycle parts support a critical operational requirement for plant engineers and maintenance teams worldwide.

The Evolution of PM800 Architecture

The PM800 Series was introduced as part of ABB's Freelance 2000 DCS platform in the late 1990s, succeeding earlier PROCONTIC and MASTER series controllers. The initial PM810 and PM820 variants established the foundational backplane bus architecture using the AF100 fieldbus protocol. With the transition to Freelance 800F and subsequently AC800F, ABB introduced enhanced CPU variants (PM863, PM864) with expanded memory, faster scan cycles, and native FOUNDATION Fieldbus H1 integration.

The PM863K02 specifically represents the second hardware revision of the PM863 CPU module, incorporating improved SRAM management and extended temperature tolerance for harsh-environment enclosures. Compatibility across PM800 backplanes (TB820, TB840) is maintained within the same generation, but cross-generation substitution requires firmware alignment verification. As the Freelance platform has entered its mature/extended-support phase, ABB has transitioned new projects to the AC800M and Freelance+ platforms — making long-term spare parts availability for PM800 a strategic procurement concern for existing installations.

PM800 Series Full Catalog & Functionalities (SKU List)

CPU / Controller Modules

• PM810: Entry-level Freelance CPU, AF100 fieldbus, 512KB user memory
• PM820: Standard CPU module, dual AF100 ports, 1MB program memory
• PM851: Enhanced CPU with Ethernet TCP/IP, 2MB memory, redundancy-capable
• PM856: High-performance CPU, 4MB memory, IEC 61131-3 multi-language support
• PM860: Redundant CPU pair base unit, hot-standby switchover <50ms
• PM861: Standard AC800F CPU, FOUNDATION Fieldbus H1 integrated
• PM863: Advanced AC800F CPU, expanded I/O capacity, dual Ethernet
• PM863K02: Rev.02 AC800F CPU module, enhanced SRAM, extended temp range
• PM864: High-availability CPU, redundant power input, 8MB memory
• PM865: Top-tier Freelance CPU, OPC-UA native, cybersecurity hardened firmware

Digital I/O Modules

• DI810: 24VDC digital input, 16-channel, sink/source configurable
• DI811: 24VDC digital input, 16-channel, NAMUR sensor compatible
• DO810: 24VDC digital output, 16-channel, 0.5A per channel
• DO814: Relay output module, 8-channel, 230VAC/2A rated contacts

Analog I/O Modules

• AI810: Analog input, 8-channel, 4–20mA / 0–10V selectable
• AI820: High-accuracy analog input, 8-channel, 16-bit resolution
• AO810: Analog output, 8-channel, 4–20mA, HART pass-through

Communication & Fieldbus Adapters

• CI801: PROFIBUS DP master adapter, 12Mbit/s, redundant media option
• CI810: AF100 fieldbus interface module, coax/fiber media
• CI840: FOUNDATION Fieldbus H1 linking device, 4-segment
• CI854: PROFIBUS DP/PA coupler interface for AC800F

Power Supply Modules

• SD821: 24VDC system power supply, 5A, DIN rail mount
• SD822: Redundant 24VDC power supply module, auto-changeover

Sourcing Hard-to-Find & Obsolete PM800 Series Parts

As ABB has formally transitioned the Freelance 800F platform to extended lifecycle support, procurement of PM800 modules — particularly CPU variants such as PM863K02, PM860, and PM856 — through standard distribution channels has become increasingly constrained. DriveKNMS maintains a dedicated inventory of tested PM800 series modules sourced from decommissioned plant assets, authorized surplus channels, and factory-refurbished stock.

For end-users operating PM800-based DCS installations with 5–15+ year remaining plant lifecycles, DriveKNMS provides: verified functional testing against ABB factory test parameters, firmware version documentation, and cross-reference support for identifying compatible substitute modules where direct replacements are unavailable. Inquiries for bulk quantities, emergency breakdown orders, and long-term supply agreements are handled directly by our technical sales team.

Quality Control for the PM800 Range

PM800 series modules — particularly CPU and communication adapter types — incorporate multi-layer backplane bus interfaces and proprietary AF100/FF H1 protocol stacks that require specialized validation beyond standard power-on testing. DriveKNMS applies the following test protocol to all PM800 inventory:

• Backplane bus continuity and impedance verification against TB820/TB840 reference fixtures
• CPU boot sequence validation with firmware version logging (Freelance Engineering Tool compatibility check)
• AF100 and Ethernet port functional test using loopback and live network injection
• SRAM data retention test (72-hour powered soak for PM863/PM864 variants)
• Visual and X-ray inspection of BGA solder joints on CPU modules
• Final burn-in at rated operating temperature range before shipment