What It Is and Where It Goes
The Siemens 6ES7928-5DA20-4AA0 is an enclosure cover for the connection module on TP1 32-bit, TP3 switch, and TPRO 8-bit interface modules in the SIMATIC S7-300 family. It protects the module's front connector and wiring from dust, accidental contact, and physical damage during panel operation. Sold in a packing unit of 4, so a single order code covers a four-pack — handy when you're populating multiple slots in a rack or keeping spares on the shelf. The product class is C, meaning these are manufactured or produced to order and cannot be reused, re-utilized, or returned against credit. Plan your quantity carefully — once ordered, they're committed to your BOM line.
Lifecycle and Sourcing Reality
Because it's class C (made to order), expect quoted lead times rather than off-the-shelf availability. Submit an RFQ with your required quantity and delivery window — we'll confirm pricing and schedule against the factory order book.
Compliance and Material Notes
RoHS compliant since 26 September 2014, so it meets the EU restriction on hazardous substances for equipment placed on the market after that date. Under REACH Article 33, the part contains lead (CAS 7439-92-1) at >0.1% w/w in the candidate list substance. This is typical for electronic enclosures with metal components or solder joints — no special handling beyond standard ESD precautions is required, but it must be declared in the supply chain documentation.
Integration Note
This cover snaps onto the TP1 32-bit, TP3 switch, or TPRO 8-bit connection module after wiring is complete. It does not change the module's electrical ratings or fieldbus addressing — it's purely mechanical protection for the front connector.