The Siemens 6ES7790-2AA00-0AA0 is a spare-part card reader for the SIMATIC Field PG M2 programming device, accepting SIMATIC Memory Cards (SMC) via an Express Card interface. This is a field-service accessory, not a panel-mounted component — it slots into the Express Card bay on the Field PG M2 to load or back up PLC programs and firmware.
Procurement Note
Because this is a Field PG M2-specific accessory with no listed successor, sourcing it cleanly means confirming the exact PG model before committing the BOM line.