What it is and what it fits
The Siemens 6ES7478-1AN00-0AA0 is a SIMATIC M7-400 MEM478 (8M) memory module providing 8 MB DRAM on a 3.3 V DIMM form factor, designed specifically for the CPU488-4 and FM456-4 processors.
Siemens 6ES7478-1AN00-0AA0 SIMATIC M7-400 Memory Module, 8 M
MPN6ES7478-1AN00-0AA0
Siemens SIMATIC M7-400, MEM478 (8M) memory module, 8 MB DRAM, 3.3 V DIMM, for CPU488-4 and FM456-4.
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026
Product details
Frequently asked questions
What processors does this memory module fit?
It is designed for the SIMATIC M7-400 CPU488-4 and the FM456-4 function module.
What is the memory size and type?
It is an 8 MB DRAM module on a 3.3 V DIMM.
MPN
6ES7478-1AN00-0AA0