Each CPU requires a Micro Memory Card (MMC). Programming may be carried out using the Step 7 Lite software (stock no. ; 539-1755 539-1755 ). S7-314C-2 PtP. SIMATIC S7-300 - CPU314C-2 PtP - CPU for installations with high requirements in terms of processing power and response time. MPI interface onboard Point to point link interface ( RS-422, RS-485) Technological functions: Counting, Closed loop control, Frequency measurement, Pulse width modulation, Pulse generator, Positioning 24 digital inputs 16 digital outputs 4 analog inputs 2 analoga outputs