Allen-Bradley SK-R1-MCB1-PF755 PowerFlex 755 Control Board

Allen-Bradley SK-R1-MCB1-PF755 is the PowerFlex 755 Main Control Board Kit, the primary control electronics used inside PowerFlex 755 drives for frames 2 through 7, and it serves as a field-replaceable module that houses the drive’s firmware-driven control logic, I/O interface, and communications coordination with the power stage, enabling straightforward field service when the PF755 requires board replacement. As a main control board kit, it replaces the PF755 drive’s core motherboard to restore or maintain motor control performance, ensuring the PF755 can manage speed reference, feedback, safety interlocks, and network communications as configured in the system, while fitting into the same chassis and interfaces used by standard PF755 installations. Compatibility details note that SK-R1-MCB1-PF755 supports PF755 firmware revisions 1.x through 16.x, aligns with frames 2–7, and Rockwell lists SK-R1-MCB2-PF755 as the direct replacement going forward. The product’s lifecycle data indicate the kit was discontinued on December 30, 2024, reflecting Rockwell’s transition to newer replacement components within the PowerFlex 755 ecosystem.