What this order code buys
The Siemens 6ES7997-2AA00-0AY0 is not a hardware module — it is an Extended Exchange Option (EEO) unit that extends the runtime of an existing EEO agreement for a Siemens automation system. It adds a one-time extension in 6-month increments, up to a maximum total runtime of 48 months. One EEO unit corresponds to one MLFB (machine-readable product number). This is a service-based order code: the buyer must obtain the EEO general terms and conditions from their Siemens contact, who calculates the number of EEO units or MLFBs needed. A consignee email address is required for delivery.
Compliance and regulatory notes
RoHS compliance is confirmed. REACH Article 33 duty-to-inform applies per the current candidate list. Export control classifications are AL: N and ECCN: N, meaning no special export license is typically required for most destinations. The group code is R1S3 and the product group is 4493 — these are internal Siemens cataloging codes that help identify the part in Siemens ordering systems.