Analog input/output modules contain analog inputs/outputs for the automation system. Analog sensors and actuators can be connected to the automation system via these modules.
The use of analog input/output modules provides the user with the following advantages:

• Optimum adaptation:
  using any desired arrangement of modules, the number of inputs/outputs can be matched to the task to be performed. Superfluous investments no longer exist.
• High-performance analog technology:
  A variety of input/output ranges and high resolution permit multitude of analog sensors and actuators to be connected.