The 6FC5210-0DF22-0AA0 Sinumerik PCU 50 is part of the Siemens Sinumerik control series for the Simodrive series. It is a PCU 50 with 1.2 GHZ processing power and 256 MB of RAM. The PCU runs off of 24V DC power. The operating system is a Windows NT Workstation V4.0 for embedded systems, WINNT4.0 WS EMBSYS. We have a picture of the Sinumerik PCU below, to get more info you can check out all of our Siemens products on our website.