SIMATIC S7-1200, CPU 1211C, compact CPU, DC/DC/relay, onboard I/O: 6 DI 24 V DC: 4 DO relay 2A: 2 AI 0-10 V DC, Power supply: DC 20.4-28.8V DC, Program/data memory 50 KB SIMATIC S7-1200 Basic Controller - Flexible thanks to wide variety of communication op