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The PM861AK02 is an advanced CPU module used in high-reliability industrial control systems. As part of the AC 800M controller family, it is designed to operate in both single and redundant configurations, ensuring seamless control and high system availability in mission-critical environments. The unit is engineered for use in process automation, supporting integration with various industrial networks and control strategies.
The PM861AK02 package includes:
PM861 Processor Module
Battery Unit
64 MB CompactFlash Memory Card
This model is a variant of the PM861AK01, but often comes with extended memory or updated firmware compatibility depending on the system configuration.
| Parameter | Specification |
|---|---|
| Product Code | 3BSE018160R1 |
| Processor Type | 32-bit RISC |
| Clock Speed | 100 MHz |
| Memory | 16 MB RAM / 4 MB Flash |
| CompactFlash Card | 64 MB |
| Redundancy Support | Yes (CPU redundancy supported) |
| Power Supply | 24 V DC |
| Power Consumption | ≤ 5 W |
| Mounting Type | DIN-rail |
| Communication Ports | 2 x Ethernet, 1 x Serial, 1 x Service Port |
| Supported Protocols | MODBUS, PROFIBUS, FOUNDATION Fieldbus, IEC 61850 |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -40°C to +70°C |
| Protection Rating | IP20 |
| Dimensions (W × H × D) | 98 mm × 186 mm × 130 mm |
| Weight | 0.39 kg |
| Certifications | CE, RoHS, UL, CSA, ATEX, SIL2/SIL3 Ready |
Petrochemical and Oil Refineries – Handles complex automation with redundancy for safety-critical processes
Power Generation Plants – Ensures stable and precise control of turbines, substations, and transmission systems
Marine and Offshore Platforms – Used in engine control, ballast management, and energy systems
Food and Beverage Industry – Supports batch processing, packaging lines, and quality control
Pharmaceutical Manufacturing – Ideal for GMP-compliant automation with high reliability
Water and Wastewater Management – Efficient process handling in pumping stations and treatment facilities
Redundancy Capability: Dual CPU support allows automatic switchover, minimizing downtime
CompactFlash Storage: Application software stored on replaceable memory, simplifying updates
Rugged and Compact: Durable design suitable for industrial cabinets and DIN rail mounting
Flexible Networking: Multiple communication interfaces for integration with diverse systems
Safe Operation: Complies with SIL2/SIL3 application standards (based on configuration)
Scalable Architecture: Integrates seamlessly with other modules in the AC 800M series
| Model | Description | Processor | Memory (RAM/Flash) | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| PM861AK01 | Standard CPU module for AC 800M | 100 MHz | 16 MB / 4 MB | 98 × 186 × 130 | 0.38 |
| PM862AK01 | Redundancy-ready CPU with higher capacity | 200 MHz | 32 MB / 8 MB | 98 × 186 × 130 | 0.40 |
| PM864AK01 | High-speed CPU for larger control systems | 266 MHz | 64 MB / 16 MB | 98 × 186 × 130 | 0.42 |
| PM865AK01 | Dual-core CPU for safety-critical systems | Dual 300 MHz | 128 MB / 16 MB | 98 × 186 × 130 | 0.45 |
| PM866AK02 | Enhanced processing for high-reliability | 300 MHz | 128 MB / 32 MB | 98 × 186 × 130 | 0.48 |
| Model | Description | Application | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|
| CI853 | Communication interface for PROFIBUS DP | Fieldbus connectivity | 98 × 186 × 130 | 0.36 |
| AI810 | Analog Input Module (8 channels) | Sensor data acquisition | 98 × 186 × 130 | 0.28 |
| AO810 | Analog Output Module (8 channels) | Actuator and control output | 98 × 186 × 130 | 0.28 |
| DI810 | Digital Input Module (16 channels) | Switch or sensor interfacing | 98 × 186 × 130 | 0.25 |
| DO810 | Digital Output Module (16 channels) | Control of relays/indicators | 98 × 186 × 130 | 0.25 |
Q1: What is included in the PM861AK02 package?
A1: The package includes the processor module, battery unit, and a 64 MB CompactFlash memory card pre-installed.
Q2: Can the PM861AK02 be used in redundant systems?
A2: Yes, it fully supports CPU redundancy when paired with a second identical unit and redundancy accessories.
Q3: How is the unit programmed or configured?
A3: It is programmed using the Control Builder engineering software within the 800xA platform.
Q4: What type of communication does it support?
A4: It supports Ethernet, serial communication, and can be expanded to PROFIBUS, MODBUS, and FOUNDATION Fieldbus.
Q5: What makes PM861AK02 different from PM861AK01?
A5: PM861AK02 may feature updated memory or firmware support for newer system integrations, though it shares the same core architecture.
Q6: Is the CompactFlash card field-replaceable?
A6: Yes, users can replace or upgrade the CompactFlash card on-site if required.
Q7: What are the operating conditions for this CPU?
A7: It operates in temperatures from 0°C to +55°C and should be housed in a control cabinet.
Q8: Can I use this CPU with third-party I/O modules?
A8: It is designed for use with S800 and S800L I/O modules but may integrate with third-party systems using supported protocols.
Q9: Is it suitable for safety-critical applications?
A9: Yes, it is SIL2 and SIL3 ready, depending on the overall system configuration.
Q10: What happens in the event of a power failure?
A10: The battery unit ensures memory retention, and in redundant systems, failover occurs automatically if properly configured.
Authenticity guarantee
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.
Free warehouse
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%.
Thoughtful after-sales service
24-hour after-sales service guarantee team, professional and standardized management service system.