ABB PM802F 3BDH000002R1 Controller Module
The ABB PM802F 3BDH000002R1, also cataloged as the PM802F Control Module, operates as a dedicated hardware component for cyclic fieldbus signal processing and execution of user application logic within ABB Freelance AC 800F DCS platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PM802F 3BDH000002R1 |
| Brand | ABB |
| Origin | Sweden |
| Weight | 1.6 kg basic unit (up to 5 kg fully assembled) |
| Dimensions | 239 mm W x 164 mm D x 202 mm H |
| Operating Temp | -20 to +55 deg C |
| Power Consumption | Max 6.3 W basic unit (~10 W depending on load) |
| Microprocessor | Intel 80960HT 32-bit RISC (25/75 MHz, up to 150 MIPS) |
| Memory Capacity | 4 MB static battery-backed RAM, 8 MB Flash PROM |
| Power Input | 24 VDC (+/-10%) |
| Instruction Execution Time | < 1.0 ms per 1000 binary/16-bit instructions |
| Fieldbus Slots | 6 module slots + 1 power slot |
| Protection Class | IP20 (up to IP54 when housed in enclosure) |
Backplane Bus Communication Velocity & I/O Density
The internal 100 MB/s CPU board data bus drives high backplane bus communication velocity across all 6 fieldbus module slots, enabling deterministic cyclic scanning across up to 1024 local and remote I/O points. In redundant unit configurations, two AC 800F controllers synchronize process data via a dedicated secondary Ethernet link, allowing seamless failover within milliseconds upon a primary processor fault. The integrated memory architecture reserves 4 MB of battery-backed static RAM for user program execution, keeping 32-bit instruction processing times under 1.5 ms.
Frequently Asked Questions
Q: How does the controller execute hardware redundancy synchronization?
A: Redundancy utilizes two AC 800F units paired via a secondary Ethernet communication module. This dedicated link maintains continuous memory synchronization between the active and standby units, guaranteeing bumpless takeover within milliseconds during a primary controller fault.
Q: How is the volatile RAM contents preserved during a main 24 VDC power disruption?
A: An internal lithium backup battery powers the 4 MB static read/write memory array when incoming 24 VDC power drops, retaining application logic and dynamic parameter tables.
Q: What expansion module interfaces are supported by the PM802F basic chassis?
A: The chassis features 6 module slots designed for fieldbus interface cards (such as PROFIBUS-DP, Modbus TCP, CAN, and FOUNDATION Fieldbus H1 via link devices) along with 1 dedicated power module slot.
Field Installation Guidelines
Mount the base unit vertically inside a grounded metal control enclosure to maintain optimal convective airflow and achieve IP20 ingress protection. Connect the chassis ground screw directly to the main cabinet protective earth (PE) bus bar using a short, heavy-gauge copper grounding strap.
Ensure the incoming 24 VDC power feed delivers regulated voltage within the +/-10% tolerance window (21.6 to 26.4 VDC). When configuring controller redundancy, connect the primary and secondary Ethernet synchronization links using industrial shielded twisted-pair cables, routing them away from high-voltage AC power lines to prevent electromagnetic noise coupling into the synchronization channel.
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| Warranty | 12 Months |
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