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- ABB
- PM866-2
- AC 800M Controllers Module Redundant Processor Unit
- Sweden
- 130 mm × 85 mm × 25 mm
- 1.5kg
- 3BSE050201R1
- Xiamen, China
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We provide 7*24 hours service to our customers. We will be there whenever you need us.
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Product Overview: PM866‑2 (3BSE050201R1)
The PM866‑2 is a high-performance, redundancy-capable CPU module in the AC 800M distributed control system lineup. It includes two CPU units and is explicitly designed for systems where uptime and fault-tolerance are critical. It integrates processors, memory, real-time clock, LED indicators, initializer button, and CompactFlash interface—making it a robust controller in mission‑critical environments.
Product Specifications (Parameters)
| Parameter | Details |
|---|---|
| Product Model | PM866‑2 (3BSE050201R1) |
| Series | AC 800M |
| Brand | ABB |
| Processor Type | 32‑bit RISC Processor (dual-core / high-performance) |
| RAM Memory | 1 MB RAM + 2 MB Flash (some variants list 512 MB–4 GB) |
| Redundancy Support | Yes (dual CPUs included; kit includes baseplates, connectors, batteries) |
| Communication Interfaces | 2 × Ethernet ports, 2 × serial (RS‑232/RS‑485) |
| Power Supply | 24 V DC (supports redundant power input) |
| Power Consumption | < 20 W |
| Operating Temperature | –20 °C to +60 °C (some variants –25 °C to +70 °C) |
| Protection Rating | IP65 (some sources say IP20) |
| Dimensions (L×W×H) | 130 mm × 85 mm × 25 mm (some variants ~220 × 58 × 28 mm) |
| Weight | Approx. 0.5 kg to 1.5 kg (depending on variant) |
Product Introduction
The PM866‑2 is designed to provide redundant processing in demanding automation environments. Delivered as a comprehensive kit, it includes twin CPUs, baseplates, CEX-bus cables, battery backup modules, and other components required for dual‑CPU architecture. Its rugged hardware and multi‑protocol support offer flexibility and reliability in control systems.
Product Applications
This module is particularly well-suited for critical, continuous-control environments such as:
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Chemical and Petrochemical Plants
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Oil & Gas Production and Refining
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Power Generation and Utilities
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Water and Wastewater Treatment
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Manufacturing Lines and Automotive Production
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Building Automation and HVAC Control
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Railway and Airport System Automation
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Large‑scale Process Plants (paper, textiles, metallurgy)
Product Advantages
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Ready‑made redundancy kit—no need to source separate modules for dual‑CPU setups.
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Reliable performance—onboard memory and processors handle complex control logic efficiently.
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Wide communication support—Ethernet, RS‑232/485, Modbus, Profibus, Ethernet/IP.
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High robustness—operates in harsh environments; some variants offer IP65 protection.
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Compact and modular—DIN rail-compatible footprint simplifies installation.
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Battery-backed memory retention—ensures data persistency under power loss.
Brand and Series
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Brand: ABB
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Series: AC 800M Distributed Control System (DCS / PLC integration)
Related Models (Same Series or Compatible)
| Model | Description | RAM Memory | Redundancy | Communication Interfaces | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| PM866K01 | Single‑CPU version (same family) | 32 MB RAM | Yes | Ethernet, RS‑232/485, CI | ~186 × 59 × 123 | ~0.7 |
| PM866K02 | Redundant CPU kit with extended memory | 128 MB | Yes | Ethernet, Modbus, CI | ~186 × 59 × 123 | ~0.71 |
| PM865K01 | Higher‑capacity CPU (64 MB RAM) | 64 MB | Yes | Ethernet, PROFIBUS, RS‑232 | ~186 × 59 × 123 | ~0.69 |
| PM864AK01 | Mid‑range CPU with 32 MB RAM | 32 MB | Yes | Ethernet, CI, RS‑232 | ~186 × 59 × 123 | ~0.67 |
| PM891K01 | Top‑end CPU with largest memory and speed | 256 MB | Yes | Ethernet, ControlNet | ~186 × 59 × 123 | ~0.73 |
Popular ABB Models (Different Series)
| Model | Description | System | RAM Memory | Communication Ports | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| AC500‑PM592 | Advanced PLC CPU for AC500 system | AC500 | 8 MB | Ethernet, RS‑485, CAN | 142 × 100 × 75 | 0.80 |
| AC500‑PM582 | Compact PLC CPU for scalable solutions | AC500 | 4 MB | RS‑232, Ethernet | 142 × 100 × 75 | 0.76 |
| CI853K01 | PROFIBUS interface module | AC 800M | — | PROFIBUS, Ethernet | 125 × 45 × 98 | 0.55 |
| CI862K01 | Modbus TCP communication interface | AC 800M | — | Modbus, Ethernet | 125 × 45 × 98 | 0.58 |
| CP600‑Pro | High-resolution industrial HMI panel | HMI | — | Ethernet, USB, Serial | 258 × 198 × 44 | 0.85 |
FAQ – PM866‑2
Q1: What makes PM866‑2 stand out from PM866K01?
A1: PM866‑2 comes as a redundancy kit—complete with dual CPUs, baseplates, cabling, and batteries—ready for deployment without additional hardware.
Q2: Can it run as a single CPU if redundancy is not needed?
A2: Yes, although it’s over-specified for single use, it functions normally in non-redundant setups.
Q3: Can it handle real-time control tasks?
A3: Absolutely—it combines onboard memory and high-speed communication to handle complex control loops with reliability.
Q4: What protocols are supported?
A4: It supports Ethernet, Modbus, Profibus, and RS‑232/485 communication, depending on configuration.
Q5: Is it suitable for harsh conditions?
A5: Yes—some versions are rated IP65 and operate from –20 °C to +60 °C, making them ideal for demanding environments.
Q6: How is memory retained during a power failure?
A6: Battery-backed nonvolatile storage retains critical data even during outages.
Q7: Is the installation complex?
A7: Not at all—it mounts on standard DIN rails and the kit includes all necessary hardware.
Q8: Does it support future expansion?
A8: Yes—its design ensures compatibility with I/O modules and communication extensions via CEX bus.
Q9: What are its physical dimensions?
A9: Typically around 130 × 85 × 25 mm, though some variants may be slightly larger.
Q10: How much does it weigh?
A10: Between ~0.5 kg to 1.5 kg depending on variant and included components.
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All product specifications are original and authentic imported products. We have an annual sales volume of 300 million yuan, and we only produce original and authentic products. All customers who cooperate with us directly online can enjoy low discounts.
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We have a complete range of product models, 80% of conventional models are in stock, and we have established channels in Asia, Africa, North America, South America, and Europe, effectively shortening the order processing time and satisfying customers in a timely manner.
Technical Team
Fast delivery. Spot goods can be shipped on the same day, and the delivery time transaction is 20% faster than that of peers on average, with a delivery time accuracy rate of 99%.
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24-hour after-sales service guarantee team, professional and standardized management service system.