What This Card Does in an M340 System
The BMXRWS128MWF: This Schneider Electric 128 MB SD flash memory card is purpose-built for the Modicon M340 automation platform, category US1PC3418160. It stores user web pages for the panel's transparent ready web server (class C30) and holds data logging CSV files directly on the card. The 128 MB capacity is sized for log files and a moderate page set — not for bulk data archiving.
What the Web Server Class Tells You
The transparent ready class C30 rating means the card arrives pre-configured for direct web serving from the Ethernet port. Web pages and CSV logs are stored and served without requiring a separate PC or additional middleware. For a field service tech, this simplifies fault isolation — pull the card and read the logs on any standard card reader.
