SM 1234 analog input/outputs permit the use of analog inputs/outputs.

This provides users with the following advantages:

• Optimal adaptation:
  With analog and digital expansion modules, users can optimally match their controllers even to more complex tasks
• Direct connection of sensors and actuators:
  Up to 14 bit resolution plus sign and different input/output ranges permit the connection of sensors and actuators without an additional amplifier
• Flexibility:
  If the task is expanded subsequently, the controller can be upgraded. Updating of the user program is extremely simple