Excellent PLC
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Product Introduction
The ABB PM858K02 (catalog no. 3BSE082896R1) is a high‑availability, redundant central controller from ABB’s AC 800M series for the 800xA distributed control system. It integrates dual processing units to ensure zero‑downtime operation, enhanced fault tolerance, and seamless integration with standard automation networks.
Product Parameters
| Parameter | Specification |
|---|---|
| Model Number | PM858K02 (3BSE082896R1) |
| CPU Clock Frequency | 33 MHz |
| RAM Memory | 16 MB total (≈7.147 MB available for application) |
| Flash Storage | 4 MB PROM + CompactFlash for data |
| Redundancy | Dual-CPU redundant configuration, switch‑over ≤10 ms |
| Processor Type | MPC866 |
| Power Supply | 24 V DC (19.2–30 V DC), typ. 210 mA, max 360 mA |
| Power Dissipation | Typical 5.1 W (max 8.6 W) |
| Dimensions (W × H × D) | 119 × 186 × 135 mm |
| Net Weight | Approx. 2.7 kg |
| Mounting | DIN‑rail IP20 slide‑lock |
| Interfaces | 2 × RJ‑45 Ethernet, 2 × RS‑232C serial |
| RTC Accuracy | 100 ppm (~1 h drift/year) |
| Operating Temp Range | +5 °C to +55 °C |
| Storage Temp Range | –40 °C to +70 °C |
Product Applications
The PM858K02 is ideal for mission-critical industrial automation tasks, such as:
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Continuous production control in oil & gas, chemical, power, pulp & paper, and water/wastewater plants.
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Systems requiring uninterrupted operations and fast recovery in case of faults.
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Applications using ABB’s 800xA system: supporting advanced control, HMI/SCADA, historian, and asset management.
Product Advantages
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High Availability: Dual CPUs and rapid automatic redundancy (≤10 ms switchover).
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Modular Scalability: Expandable through standardized I/O and communication modules.
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Robust Communication: Dual Ethernet and PROFIBUS-ready hardware for industrial connectivity.
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Field‑grade Durability: IP20 design tolerates wide temperature, humidity, and mechanical stresses.
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Streamlined Maintenance: Slide‑on DIN rail design and front-panel LEDs/SERVICE port ease installation and service.
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Security & Standards: ISA Secure certified, full EMC testing, RoHS/WEEE compliant.
— FAQs (10)
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What does “redundant” mean?
Two identical CPUs run in parallel—if one fails, the other takes over without interruption. -
Is my application limited by memory?
With ~7.1 MB application RAM per CPU, it handles typical DCS loads, though large IEC projects may need more. -
Which ABB firmware is supported?
Compatible with 800xA 6.0.2 and Compact Control Builder 6.0.0‑1 or later. Update recommended. -
What ports are available?
Two Ethernet (CN1, CN2) and two RS‑232C (one isolated for service). -
What power does it need?
Requires 24 V DC. Typical draw is 210 mA (5.1 W); peak up to 8.6 W. -
Can I install in high heat?
Operates reliably from +5 °C to +55 °C; above that requires cooling/enclosure. -
How do I back up configurations?
Use CompactFlash card and RCU‑Link for offline backup and service tasks. -
What is the service lifetime?
Designed for long-term industrial use, with replaceable battery and support via ABB lifecycle programs. -
Where are batteries located?
Two internal lithium batteries (4943013‑6) maintain RTC and nonvolatile RAM. -
Does it include a license?
No software license is included; these must be ordered separately.
Related / Same-Series Models (6)
| Model | Description |
|---|---|
| PM858K01 | Single‑CPU version of PM858 (no redundancy) |
| PM857K02 | Redundant version using higher-speed CPU (96 MHz) |
| PM857K01 | Single-CPU PM857 (IEC61508 SIL‑certified) |
| PM860AK01 | High‑speed CPU module (48 MHz), single CPU |
| PM851AK01 | Entry-level single-CPU controller (24 MHz) |
| PM856AK01 | Mid‑range single-CPU CPU (24 MHz, 8 MB RAM) |
Other Popular ABB Controllers (6)
| Model | Brief Description |
|---|---|
| PM863K02 | Redundant high-integrity (IEC61508 SIL‑certified) controller |
| PM865K02 | Fast redundant CPU with higher performance (e.g. 100 MHz) |
| PM860AK02 | Dual-CPU version of PM860A high-speed controller |
| PM864AK02 | Redundant dual-CPU high-performance module |
| PM892K02 | Supervisory module dual-redundant for large process automation |
| PM851AK02 | Redundant version of entry-level PM851 range |
