ABB YPQ202A YT204001-KB Industrial Control I/O Board Technical Specifications Manufacturer ABB Model designation YPQ202A Part number YT204001-KB System context ABB Advant Master S400 I/O installation, subject to confirmation for the installed configuration System Overview & Technical Context ABB Advant Master S400 I/O is a legacy industrial automation I/O platform that provides an interface between field-level signals and the control system. ABB's S400-to-S800 evolution