The Siemens 6ES7195-0BD21-0XA0 is an SPC3 ASIC implementing a full PROFIBUS DP slave interface, with bus access embedded in the silicon and no external protocol handler required. It supports up to 12 Mbit/s transmission rate, auto-detection of baud rate, and 1.5 kbyte telegram memory – adequate for most cyclic data profiles in a DP slave. Rated from -40 °C to 85 °C, the ASIC fits standard industrial temperature zones. Its power loss is 0.5 W at the 5 V DC supply – a light load on the backplane regulator.
The SPC3 handles the full DP stack including bus access, telegram processing, and diagnostics – no extra firmware for the protocol core is needed. The 1.5 kbyte telegram memory fits the typical modular slave profile; larger profiles require a different ASIC or an integrated PROFIBUS controller.