SIMATIC S7-1500 compact CPU CPU 1512C-1 PN, central processing unit with work memory: 400 KB for program and 2 MB for data, 32 digital inputs, 32 digital outputs, 5 analog inputs, 2 analog outputs, 6 high-speed counters, 4 high-speed outputs for PTO/PWM/frequency output, 1st interface: PROFINET IRT with 2-port switch, 25 ns bit performance, including push-in front connector, SIMATIC Memory Card required