Siemens SINAMICS V20 Smart Access module. Attaches to the front of the inverter and provides web-based access from a connected device such as a PC, tablet or Smartphone via Wifi.
Available operations include quick commissioning, inverter parameterization, JOG, monitoring, diagnostics, backup and restore.
Note that this module is only for commissioning and cannot be used with the inverter permanently.
Manufacturer part number is 6SL3255-0VA00-5AA0. Sometimes specified as 6SL32550VA005AA0.
For more information, refer to the Siemens V20 manual below, chapter "Commissioning using SINAMICS V20 Smart Access", page 135.