Analog expansion modules provide the option for using further analog inputs/outputs in addition to the existing integral analog inputs/outputs.

This provides users with the following advantages:

• Optimal adaptation
  • with analog signal modules, users can optimally adapt their controllers even to more complex tasks.
  • signal boards can be used where space is limited or if only a few additional inputs/outputs are required. Each S7-1200 CPU can be modularly expanded by a signal board. This does not increase the mounting space required for the controller.
• Direct connection of sensors and actuators:
  Up to 14 bit resolution 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