The Yokogawa DR1015B80 is a DIN Rail Mounting Bracket or Adapter. It is not a functional electronic device like a converter or indicator, but a crucial mechanical accessory.
Its sole purpose is to allow for the secure and standardized mounting of specific Yokogawa field instruments onto a standard 35mm DIN rail, which is the primary mounting method inside control panels and junction boxes. This model is specifically designed to accommodate Yokogawa's UTAdvanced series signal conditioners, isolators, and other modules that require this specific bracket.