Digital input/output modules possess digital inputs/outputs for the automation system. Digital sensors and actuators can be connected via these modules.

Use of the digital input modules offers the following advantages for users:

• Optimum adaptation;
  the number of inputs/outputs can be adapted to the respective task using optional combination of modules. Superfluous investments no longer exist
• Flexible process connection;
  the automation system can be connected to the process using many different digital actuators and sensors