The Siemens 6AG1900-0AB00-7AA0 is a SIPLUS NET C-Plug — a removable data storage medium for SIMATIC NET devices with a C-Plug slot. It holds configuration and application data for quick device replacement in case of failure. Rated for horizontal mount operation from -40 to +75 °C with IP20 protection.
Lifecycle & Sourcing
The conformal coating (per the description) provides additional protection against moisture and contaminants, consistent with the EN 60721-3-3 Class 3S4 environmental compliance for sand and dust — though during storage the supplied plug covers must remain on unused interfaces.