The WDS-614 is a complete rear frame, with SLW-83 insert/digital back interface, to accomodate a digital back with Phase One XF, Mamiya 645 AFd interface to the WDS-body working with the WDS/WRS Lenspanels with Digital Series Lenses. Digital Backs with Phase One XF, Mamiya 645 AFd mounts can normally be mounted in landscape and portrait mode themselves. 

The rear frame has the SLW-83 digital back interface plate for Phase One XF, Mamiya 645 AFd that can also be switched between landscape and portrait mode.

The SLW-83 digital back interface is compatible with the WRS series, Actus DB, Actus-XL-DB and more.