Siemens 6ES7653-2CF00-0XB0 SIMATIC Bus Adapter (S7-300)

The Siemens 6ES7653-2CF00-0XB0 is a SIMATIC bus adapter intended for integration with SIMATIC S7-300 devices. It is used in the modular S7-300 controller chassis to provide backplane/bus connectivity between modules. The OEM part number identifies the original Siemens component and its compatibility within the S7-300 family. Exact mounting location and compatibility depend on the controller rack configuration.