The Siemens HMIPU09D0001 is a Panel PC 19 Univ., carrying the full description HMIPCCP180BD10N00N00 Panel PC 19 Univ. It's a 19-inch industrial panel PC meant for mounting into a control cabinet or operator console — the kind of unit you'd see running an HMI runtime on a production line or a SCADA node in a process plant.
The unit fits a 19-inch rack or cabinet cutout. Verify cut-out dimensions and power supply against original project documentation before specifying as a drop-in replacement.