Product Core Brief
- Model: ABB PM802F 3BDH000002R1
- Brand: ABB
- Series: AC800F / Freelance 800F
- Core Function: Central processing unit for distributed process control
- Product Type: Base Unit / CPU Module
- Key Specs: 75 MHz RISC | 4 MB SRAM | Battery Buffered
- Condition: New Surplus / Original Sealed
Product Introduction
ABB 3BDH000002R1 is the core processing unit for Freelance 800F systems. This OEM controller manages fieldbus communication and executes control logic reliably.
The replacement module features 4 MB of battery-buffered SRAM. It delivers 150 MIPS performance via a 75 MHz RISC processor. This industrial automation unit ensures data retention during power loss.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Processor Type | Superscalar RISC |
| Clock Frequency | 75 MHz (150 MIPS) |
| Main Memory | 4 MB SRAM (Battery Buffered) |
| Program Memory | 4 MB EPROM |
| Configuration Memory | 16 Kbit EEPROM |
| Ethernet Ports | 2x Slots (System Bus) |
| Fieldbus Slots | 4x (E1-E4 Hot-Swap) |
| Service Port | RS232 (9-pin D-Sub) |
| Operating Temp | 0°C to +60°C |
| Power Supply | 5V / 3.3V Internal |
| Watchdog | Independent Hardware Timer |
| Weight | 1.6 kg |
Quality Control Process
We don’t just ship surplus stock blindly. Every ABB 3BDH000002R1 unit undergoes a rigorous bench test. First, we inspect the E1-E4 fieldbus slots for pin wear. Then, we apply power and verify the 5V/3.3V rails with a Fluke 87V.
Next comes the functional check. We verify the battery backup circuit holds RAM data during a simulated power cut. Does the RS232 service port respond? We also check the independent watchdog timer for proper reset behavior. Finally, it goes into an anti-static bag with desiccant.
Replacement Pitfall Guide
❗ Battery Health. This OEM controller relies on a lithium battery for SRAM retention. Surplus stock may have dead cells. Always test the backup voltage before racking. A dead battery means lost configuration on power cycle.
❗ Software Version Lock. The ABB 3BDH000002R1 requires ControlBuilder F V7.1SP2a or higher. Older engineering stations won’t recognize the hardware. Check your license and version before ordering.
❗ Slot E1/E2 Priority. Battery backup is provided specifically through slots E1 and E2. Don’t assume all slots support retention. Placing critical memory modules in E3/E4 without external backup risks data loss.
❗ Hot-Swap Procedure. Fieldbus modules in E1-E4 are hot-swappable, but the CPU itself is not. Never pull this industrial automation unit while powered. You’ll corrupt the backplane bus. Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor | Compatibility Level | Migration Notes |
|---|---|---|---|
| 3BDH000002R1 | PM803F 3BDH000530R1 | Direct Drop-in | 16MB RAM; requires SW V7.1SP2a+ |
| 3BDH000002R1 | 3BDH000002R1 | Direct Drop-in | Must match FW Rev & Battery Health |
| 3BDH000002R1 | AC800M PM86x | Platform Migration | Requires 800xA migration project |
- Logic Performance: 150 MIPS @ 75 MHz
- Data Retention: >1.5 Years (with fresh battery)
