The CPU 1511C-1 PN has:

• A powerful processor:
  The CPU achieves command execution times as low as 60 ns per binary instruction.
• A large work memory:
  175 KB for program, 1 MB for data
• Integrated inputs/outputs;
  16 digital inputs and 16 digital outputs as well as 5 analog inputs and 2 analog outputs for current/voltage signals and an additional input for measuring temperature on the CPU.
• SIMATIC Memory Cards as load memory:
  permit additional functions such as datalog and archives
• Flexible expansion capability:
  single-tier configuration with max. 32 modules (CPU + 31 modules)
• Screen with functions for
  • the display of overview information, e.g. IP address of the integrated interface, station name, plant designation, location identifier, etc.,
  • display of diagnostics information
  • display of module information
  • display of a user-definable logo
  • showing display settings
  • setting IP addresses
  • setting the date and time
  • selecting the operating mode
  • resetting the CPU to factory settings
  • disabling/enabling the display
  • enabling protection levels.
• PROFINET IO IRT interface:
  for connecting distributed I/O via PROFINET.