Product Core Brief
- Model: ABB PM851AK01 3BSE066485R1
- Brand: ABB
- Series: AC 800M / 800xA
- Core Function: Central processing and S800 I/O bus control for AC 800M systems.
- Product Type: Processor Unit
- Key Specs: 24 MHz Clock | 16 MB RAM | 24 Vdc Input
- Condition: New Surplus / Refurbished
Product Introduction
ABB 3BSE066485R1 serves as the logical heart for AC 800M automation systems. This industrial automation unit processes IEC 61131-3 logic while managing S800 I/O communications.
The replacement module features 16 MB of application RAM and executes 1000 boolean operations in just 0.46 ms. It operates on 24 Vdc with a max power draw of 7.2 W, ensuring reliable performance in compact panels.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Processor Clock | 24 MHz |
| Boolean Performance | 0.46 ms / 1000 instructions |
| Application RAM | 16 MB |
| Storage Flash | 337 MB |
| Ethernet Ports | 2x RJ45 (CN1 Active, CN2 Inactive) |
| Serial Ports | 2x RS-232C (COM3, COM4) |
| Input Voltage | 24 Vdc |
| Max Power Consumption | 7.2 W |
| Operating Temp | +5 °C to +55 °C |
| Product Series | AC 800M / 800xA |
Quality Control Process
We verify every ABB 3BSE066485R1 through a strict five-step protocol. First, technicians inspect the PCB for oxidation or capacitor leakage. Next, we perform a Power-On Self-Test (POST) in a test rack.
Third, a Fluke multimeter checks input ripple below 5%. Fourth, we validate firmware versions and COM port jumper settings. Finally, we seal the unit in anti-static packaging with bubble cushioning.
Replacement Pitfall Guide
❗ Firmware Mismatch: Never assume identical models share firmware. AC 800M versions are sensitive; mismatches cause “Hardware Mismatch” faults. Always photograph the old label first.
❗ COM Port Jumper Errors: This OEM controller uses jumpers for modem control signals. I once saw an engineer spend hours troubleshooting because they ignored these settings. Photograph them before removal.
❗ Ethernet Port Misuse: Note that the CN2 port is inactive on this specific module. Plugging a network cable into CN2 will not establish communication. Always use CN1 for network connections.
❗ ESD Negligence: These boards are static-sensitive. Touching gold fingers without a wrist strap causes intermittent communication failures. Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| 3BSE066485R1 | PM856AK01 | Needs Adaptation | Higher performance; requires project recompile. |
| 3BSE066485R1 | (New Surplus) | Direct | Verify firmware and jumper settings match exactly. |
- Performance Benchmark: 0.46 ms per 1000 boolean instructions ensures fast logic execution.
- Memory Benchmark: 16 MB RAM supports extensive program and data storage.
