The CPU 1518F-4 PN/DP features:

• A powerful processor
  The CPU achieves a command execution time as low as 1 ns per binary command.
• Extensive RAM
  6 MB for program, 20 MB for data
• SIMATIC Memory Cards as load memory;
  permit additional functions such as datalog and archives
• Flexible expansion options
  Single-tier configuration with max. 32 modules (CPU + 31 modules)
• Screen with functions for the
  • displaying overview information such as IP address of the integrated interface, station name, plant designation, location identifier, etc.
  • displaying safety mode, overall signature and date of the last download with signature change
  • Display of diagnostic information
  • Display of module information
  • Showing display settings
  • Setting IP addresses
  • Setting date and time
  • Selection of operating mode
  • Resetting of CPU to factory settings
  • Disabling/enabling of display
  • Enabling of protection levels
  • Display of safety mode, overall signature and date of the last download with signature change.
• PROFINET IO IRT interface for connecting distributed I/O via PROFINET
• 2 PROFINET interfaces for network separation
• PROFIBUS DP interface for connecting distributed I/O via PROFIBUS
• Supports PROFIsafe in centralized and distributed configuration