CPU's 2500-C400



2500-C400 CPU with 3072K User Memory

The 2500-C400 Series SIMATIC® 505 CPU provides discrete, analog, loop, advanced mathematical, and high-speed sequential control capability for your Series SIMATIC® 505 control system.


  • Replaces Siemens® 555-1106 with no rewiring
  • 3072K user memory
  • 8192 digital / 8192 analog I/O
  • 256 loops / 512 alarms
  • Built-in Ethernet for MMI and programming
  • Built-in USB for programming
  • Profibus-DP master and RS485 Remote I/O ports
  • Built-in SD flash card slot for program backup and documentation



    2500-C400 CPU Product Brochure (590K PDF)