The CPU 417-5H features:

• A powerful processor:
  The CPU achieves command execution times as low as 7.5 ns per binary command.
• 32 MB RAM (16 MB for programs, 16 MB for data):
  Load memory for user programs and configuration data for the S7-400H automation system; fast main memory for subroutines of the user program that are relevant to the process.
• A memory card:
  For expanding the integrated load memory. In addition to the program itself, the information contained in the load memory also includes configuration data for the S7-400H, which is why it takes up around twice as much space in the memory. The result is:
  • The integrated load memory is not sufficient for large programs, which is why a memory card is often required.
    RAM and FEPROM cards are available (FEPROM for saving data even when power supply is disconnected).
• Flexible expansion options
  Up to 262 144K digital and 16 384 analog inputs/outputs.
• MPI multi-point interface:
  The MPI enables the creation of a simple network with up to 32 nodes and a data transfer rate of 187.5 kbit/s. The CPU can establish up to 64 connections to nodes on the communication bus (C bus) and the MPI.
  Note:
  If PROFIBUS DP and MPI interfaces are being used simultaneously, only the following bus connectors can be connected to the MPI interface:
  • With socket: 6ES7 972-0BB42-0XA0
  • Without socket: 6ES7 972-0BA42-0XA0
• PROFIBUS DP interface:
  The PROFIBUS DP interface allows a redundant, distributed automation configuration offering high speed and ease of use. From the user's point of view, the distributed I/O is handled like the centralized I/O (same configuring, addressing and programming).
• PROFINET interface with 2 ports (switch):
  Supports system redundancy and MRP (Media Redundancy Protocol)
• Mode selector:
  Toggle switch design.
• Diagnostics buffer:
  The last 120 alarm and interrupt events are stored in a ring buffer for diagnostic purposes.
• Real-time clock:
  Diagnostics reports from the CPU are provided with the date and time.
• PROFIBUS DP interface:
  The CPU 417-4H with PROFIBUS DP master interface enables distributed automation to be established at high speed and with easy operation. From the user's point of view, the distributed I/O is handled like the centralized I/O (same configuring, addressing and programming).
  Note:
  If PROFIBUS DP and MPI interfaces are being used simultaneously, only the following bus connectors can be connected to the MPI interface:
  • With socket: 6ES7 972-0BB42-0XA0
  • Without socket: 6ES7 972-0BA42-0XA0