ET 200S terminal module for IPM25 FS A
The Siemens 3RK1903-3EC00 is a 65 mm terminal module that sits between the ET 200S backplane bus and the IPM25 FS A inverter power module, carrying the supply line connection for that drive slice. It is the mechanical and electrical interface that delivers the DC bus voltage and control signals to the inverter — without it the IPM25 doesn't seat or power up in the rail.
The substance prohibitance date of 05/01/2012 confirms RoHS compliance — the module shipped after that date meets the EU directive's restricted-substance limits.