The Omron XW2B-20G4 is a standard-type connector-terminal block conversion unit from Omron's XW2B series. It simplifies the replacement of connectors and terminal blocks while requiring less in-panel wiring. This unit features a 20-pin MIL flat cable connector on the control side and an M3 screw terminal block on the field side, providing a 1-to-1 correspondence between connector pins and terminal block positions .