AMIKON Industrial Automation ABB AC 800M High Integrity ABB · PROCESS CONTROL ABB PM857K01 3BSE088385R1 High Integrity Processor Unit · 96 MHz High Integrity processor unit for AC 800M safety control architectures, with S800 I/O High Integrity support and 800xA High Integrity engineering. 01 / OVERVIEW AC 800M High Integrity processor PM857K01 is an ABB AC 800M High Integrity processor unit with a 96 MHz MPC866 processor, 32 MB memory and a maximum capacity of 128 I/O signals