SIMATIC S7-200 SMART, CPU SR60, CPU, AC/DC/relay, onboard I/O: 36 DI 24 V DC; 24 DQ relay 2 A; power supply: AC 85 - 264 V AC at 47-63 Hz program/data memory 50 KB web server support
SIMATIC S7-200 SMART, CPU ST20, standard CPU, DC/DC/DC, onboard I/O: 12 DI 24 V DC; 8 DQ 24 V DC; power supply: DC 20.4 - 28.8 V DC, program/data memory 20 KB web server support
SIMATIC S7-200 SMART, CPU ST30, standard CPU, DC/DC/DC, onboard I/O: 18 DI 24 V DC; 12 DQ 24 V DC; power supply: DC 20.4 - 28.8 V DC, program/data memory 30 KB web serv