The SIMATIC S7-1200 system comes in three different models, CPU 1211C, CPU 1212C and CPU 1214C, that may each be expanded to exactly fit your machine requirements. One signal board can be added inside the front of any CPU to easily expand the digital or analog I/Os without affecting the physical size of the controller. Signal modules can be connected to the right side of the CPU to further expand the digital or analog I/O capacity. CPU 1212C accepts two and CPU 1214C accepts eight signal modules. Finally, all SIMATIC S7-1200 CPUs can be equipped with up to three communication modules on the left side of the controller for performing point-to-point serial communication.
"Digital inputs as supplement to the integral I/O of the CPUs For flexible adaptation of the controller to the relevant task
For subsequent expansion of the system with additional inputs "
"Analog inputs for SIMATIC S7-1200
With extremely short conversion times For connecting analog actuators and sensors without additional amplifiers For solving even more complex automation task"
"SIMATIC S7-1200 Communication
The new SIMATIC S7-1200 is equipped with an integrated PROFINET interface. Up to 3 Communication Modules can be added to any of the SIMATIC S7-1200 CPUs. "