ABB PM851AK01 3BSE066485R1 Control Module | Replacement, Equivalent & Selection Guide
The ABB PM851AK01 (catalog no. 3BSE066485R1) is a high-performance CPU control module from ABB’s AC500 programmable logic controller series. Designed for demanding industrial automation environments, it delivers reliable real-time control, flexible communication, and seamless integration with ABB’s modular I/O ecosystem. At Konmask.com, we help engineers source the original module or identify verified compatible alternatives — with full traceability and quality assurance.
Technical Specifications
| Manufacturer | ABB |
| Part Number | PM851AK01 |
| Catalog Number | 3BSE066485R1 |
| Series | AC500 |
| Module Type | CPU / Control Module |
| Program Memory | 1 MB (user program) |
| Data Memory | 512 KB |
| Communication Ports | 1× Ethernet (10/100 Mbps), 1× RS-232, 1× RS-485 |
| Supported Protocols | PROFIBUS DP, Modbus RTU/TCP, CANopen, EtherNet/IP |
| Programming Standard | IEC 61131-3 (LD, FBD, ST, IL, SFC) |
| Supply Voltage | 24 V DC |
| Operating Temperature | 0 °C to +60 °C |
| Protection Rating | IP20 |
| Weight | approx. 200 g |
| Certifications | CE, UL, cUL |
Compatible Replacement & Equivalent Models
When the PM851AK01 is unavailable or out of budget, the following models may serve as functional equivalents or drop-in replacements depending on your application requirements. Always verify firmware compatibility and I/O mapping before substitution.
| Model | Series | Key Difference | Compatibility |
|---|---|---|---|
| ABB PM851AK02 | AC500 | Expanded memory variant | Direct drop-in (same form factor) |
| ABB PM856AK01 | AC500 | Higher CPU performance | Compatible with same I/O bus |
| ABB PM864AK01 | AC500 | Enhanced communication options | Same rack, firmware update required |
| ABB PM891 | AC500-eCo | Compact economy variant | Partial — reduced I/O capacity |
Not sure which model fits your system? Contact our selection team at support@konmask.com.
Why Choose the Original Model
- Guaranteed firmware compatibility with existing AC500 I/O modules and expansion racks
- Full ABB software support via Automation Builder IDE — no reconfiguration required
- Proven field reliability in continuous 24/7 industrial operations
- Spare parts availability — ABB maintains long-term support for AC500 platform
- Regulatory compliance — CE, UL certified for global deployment
Typical Applications
- Water & wastewater treatment plant automation
- Building management systems (BMS/HVAC)
- Conveyor and material handling control
- Power distribution and energy management
- Packaging and food & beverage production lines
- Oil & gas process control panels
System Compatibility
The PM851AK01 is designed to operate within the ABB AC500 modular PLC platform. Compatible system components include:
- I/O Modules: DC532, DC522, AI531, AO531, DI524, DO524 series
- Communication Modules: CM572-DP (PROFIBUS), CM575-DN (DeviceNet), CM589-PNIO (PROFINET)
- Power Supply Units: PS501-PROG, PS560-ME
- Expansion Racks: TB521, TB541
- HMI Panels: ABB CP600 series (via Ethernet)
- Programming Software: ABB Automation Builder 2.x / CoDeSys 3.5
Selection Guide
Use the criteria below to determine whether the PM851AK01 is the right module for your project:
| Requirement | PM851AK01 Suitable? | Recommended Alternative |
|---|---|---|
| Program size < 1 MB | ✅ Yes | — |
| Program size > 1 MB | ❌ No | PM856AK01 or PM864AK01 |
| PROFIBUS DP master required | ⚠️ Via CM572-DP add-on | PM864AK01 (built-in) |
| Budget-sensitive project | ⚠️ Mid-range | PM891 (AC500-eCo) |
| Redundancy required | ❌ No | PM891R / PM895 |
| Standard I/O control | ✅ Ideal | — |
Quality Assurance & Sourcing
Every ABB PM851AK01 unit sourced through Konmask.com undergoes a structured verification process:
- Origin Verification — Supplier documentation and batch traceability reviewed
- Physical Inspection — Label authenticity, housing integrity, and connector condition checked
- Functional Testing — Power-on test and communication port validation performed
- Documentation Package — Certificate of conformity and test report provided on request
We source from authorized distributors and certified secondary-market channels. All units are shipped with anti-static packaging and full ESD protection.
How to Order
- Add the ABB PM851AK01 (3BSE066485R1) to your cart, or
- Email support@konmask.com with your quantity and delivery requirements
- WhatsApp / Phone: +0086 19859288691 for urgent inquiries
- Receive a formal quotation within 1 business day
- Confirm order — we ship globally via DHL, FedEx, or UPS with full tracking
Lead Time: In-stock units ship within 2–3 business days. Special orders: 5–10 business days.
Replacement & Compatibility FAQ
Q: Can I replace PM851AK01 with PM856AK01 without reprogramming?
A: In most cases yes — both share the same AC500 rack and I/O bus. However, a firmware check and minor address remapping in Automation Builder is recommended.
Q: Is the 3BSE066485R1 the only catalog number for PM851AK01?
A: Yes, 3BSE066485R1 is the standard ABB catalog reference for the PM851AK01 module.
Q: Do you supply refurbished units?
A: We supply both new and tested-refurbished units. Condition is clearly stated in the quotation. Refurbished units carry a 90-day functional warranty.
Q: Can this module work with third-party I/O racks?
A: The PM851AK01 is optimized for ABB AC500 I/O. Third-party integration is possible via Modbus or EtherNet/IP but requires custom configuration.
Q: What warranty do you offer?
A: New units carry the manufacturer’s standard warranty. Konmask.com additionally provides a 12-month sourcing guarantee covering DOA (dead-on-arrival) replacement.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
