ABB PM856K01 3BSE018104R1 AC 800M Processor Module | Replacement, Equivalent & Selection Guide
The ABB PM856K01 (part number 3BSE018104R1) is a high-performance CPU module for the ABB AC 800M distributed control system (DCS) platform. Designed for demanding process automation environments, it delivers deterministic real-time control, redundancy support, and seamless integration with ABB’s S800 I/O and fieldbus networks. This page provides full technical specifications, compatible replacement models, application guidance, and a structured selection guide to help engineers and procurement teams make confident sourcing decisions.
Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | ABB |
| Model / Part No. | PM856K01 / 3BSE018104R1 |
| Platform | AC 800M DCS |
| Processor Type | 32-bit RISC CPU |
| Program Memory | 32 MB Flash |
| RAM | 64 MB SDRAM |
| Communication Ports | 2 × Ethernet (10/100 Mbps), 1 × RS-232 |
| Fieldbus Support | PROFIBUS DP, FOUNDATION Fieldbus, Modbus, DNP3 |
| Redundancy | Hot-standby CPU redundancy supported |
| Operating Voltage | 24 V DC (via backplane) |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | −40 °C to +70 °C |
| Humidity | 5–95% RH, non-condensing |
| Protection Class | IP20 |
| Weight | ~900 g |
| Certifications | CE, UL, cUL, ATEX (Zone 2) |
| Programming Environment | ABB Control Builder M (IEC 61131-3) |
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as direct or functional replacements for the PM856K01. Compatibility depends on firmware version, backplane revision, and application requirements — always verify with your system documentation before substitution.
| Model | Part Number | Notes |
|---|---|---|
| ABB PM856AK01 | 3BSE018105R1 | Enhanced variant; same form factor, extended memory |
| ABB PM860K01 | 3BSE018100R1 | Entry-level AC 800M CPU; reduced memory, same backplane |
| ABB PM861AK01 | 3BSE018157R1 | Mid-range upgrade; compatible I/O and fieldbus |
| ABB PM864AK01 | 3BSE018161R1 | High-performance variant; supports larger application programs |
| ABB PM865K01 | 3BSE031151R1 | Latest generation; backward-compatible with AC 800M chassis |
Note: Firmware and hardware revision compatibility must be confirmed prior to installation. Contact Konmask for pre-sale technical verification.
Why Choose the Original Model
- Proven field reliability — PM856K01 has an extensive installed base in oil & gas, power, and chemical industries worldwide.
- Exact firmware compatibility — eliminates re-validation effort required when substituting with a newer CPU variant.
- Spare parts continuity — ideal for brownfield expansions where system homogeneity is critical.
- Hot-standby redundancy — supports 1:1 CPU redundancy without additional hardware modifications.
- Lower integration risk — no Control Builder M project migration required compared to PM864/PM865 upgrades.
Typical Applications
- Oil & gas upstream/downstream process control (DCS backbone)
- Power generation and substation automation
- Chemical and petrochemical batch/continuous process control
- Pulp & paper mill automation
- Water treatment and municipal infrastructure SCADA
- Pharmaceutical manufacturing (21 CFR Part 11 environments)
- Marine and offshore platform control systems
System Compatibility
- Backplane: AC 800M TB820V2 / TB840A / TB842A (standard and redundant)
- I/O Modules: Full S800 I/O family (AI810, AO810, DI810, DO810, etc.)
- Fieldbus Interfaces: CI854A (PROFIBUS DP), CI856 (FF HSE), CI857 (HART), CI858 (DNP3)
- Software: ABB Control Builder M Professional v5.x and above
- OPC Connectivity: OPC DA / OPC UA via ABB OPC Server
- Network: MMS/IEC 61850, Modbus TCP, PROFINET (via gateway)
Selection Guide
Use the decision matrix below to determine whether PM856K01 is the right choice or whether an alternative model better fits your requirements:
| Requirement | Recommended Model |
|---|---|
| Direct like-for-like replacement, same firmware | PM856K01 ✓ |
| Larger application program (>16 MB) | PM864AK01 or PM865K01 |
| Budget-constrained, smaller I/O count | PM860K01 |
| Future-proof upgrade path | PM865K01 |
| Redundant CPU pair (hot-standby) | PM856K01 × 2 (paired) |
| ATEX Zone 1 hazardous area | Consult ABB — external barrier required |
Quality Assurance & Sourcing
- Source: Authorized distributor stock and verified surplus channels.
- Inspection: Every unit undergoes visual inspection, label verification, and functional power-on test before shipment.
- Authenticity: Counterfeit screening performed on all surplus units; original ABB firmware verified where applicable.
- Packaging: Anti-static ESD packaging with desiccant; double-boxed for international freight.
- Warranty: 12-month warranty against manufacturing defects; DOA replacement within 7 business days.
- Traceability: Full lot traceability documentation available on request.
How to Order
- Confirm your AC 800M backplane revision and current firmware version.
- Specify quantity and required delivery timeline.
- Request a formal quotation via [email protected] or WhatsApp +0086 19859288691.
- Receive proforma invoice; confirm payment (T/T, PayPal, or trade terms for qualified accounts).
- Shipment dispatched within 1–3 business days; tracking provided.
Replacement & Compatibility FAQ
Q: Can PM856K01 replace PM860K01 directly?
A: Yes, PM856K01 is a higher-specification model and is backward-compatible with PM860K01 backplane slots. No hardware modification is required, but firmware and Control Builder M project settings should be reviewed.
Q: Is PM856K01 compatible with the TB840A redundant backplane?
A: Yes. PM856K01 supports hot-standby redundancy on TB840A and TB842A backplanes when paired with an identical second CPU module.
Q: What is the difference between PM856K01 and PM856AK01?
A: PM856AK01 (3BSE018105R1) is an enhanced variant with extended program memory. Both share the same physical form factor and backplane interface; PM856AK01 is preferred for applications with larger IEC 61131-3 program sizes.
Q: Do you supply tested or refurbished units?
A: We supply both new-in-box (NIB) and tested surplus units. Condition is clearly stated on each listing. All surplus units pass our functional test protocol before dispatch.
Q: Can I return a module if it is incompatible with my system?
A: Yes. We offer a 30-day return window for unused modules in original packaging. Please contact support before returning.
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Contact: [email protected] | +0086 19859288691
