Siemens 6ES7 678-1RA00-0XB0 Extension Circuit Board

Siemens 6ES7 678-1RA00-0XB0 PS Extension Board is the Power Supply Extension Board for the SIMATIC WinAC Slot PC-based controller family, designed for CPU 41x-2 PCI configurations. Listed by Siemens as a spare part for WinAC Slot 41x PCI (V3.1), this extension board provides the WinAC slot with enhanced PS power management by accepting a 24 V DC external supply and delivering a 12 V DC internal rail to the system, with an integrated 3.6 V battery for backup. Used in WinAC Slot 41x PCI setups to sustain operation of the PC-based control environment, the 6ES7 678-1RA00-0XB0 is packaged as a dedicated extension card that fits the 41x PCI slot form factor and supports the PS extension role within the WinAC architecture.