Various CPUs with graduated levels of performance are available for the ET 200pro:

Standard CPUs

• IM 154-8 PN/DP CPU:
  For applications with medium requirements regarding the program scope and processing speed, for distributed setup via PROFINET IO or PROFIBUS DP.
• CPU 1516pro-2 PN:
  For applications with high requirements on the program scope, processing speed and networking, for distributed setup via PROFINET IO RT/IRT. The additional integrated PROFINET IO interface with separate IP address can be used, for example, for network separation.