The CPU 417-4H is the most powerful CPU for the SIMATIC S7-400H and S7-400F/FH. It allows a fault-tolerant S7-400H system to be configured. It can also be used for the failsafe S7-400F/FH automation system in conjunction with an F-runtime license.

The integrated PROFIBUS DP interface supports direct connection to the PROFIBUS DP fieldbus as master.