Standard CPU with Serial & RJ45 Port
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CPU SR20, AC/DC/Relay, 12DI/8DO
6ES7288-1SR20-0AA1
SIMATIC S7-200 SMART, CPU SR20, CPU, AC/DC/relay, onboard I/O: 12 DI 24 V DC; 8 DQ relay 2A; power supply: AC 85 – 264 V AC at 47-63 Hz, 77 to 138 V DC program/data memory 20 KB

CPU SR30, AC/DC/Relay, 18DI/12DO
6ES7288-1SR30-0AA1
SIMATIC S7-200 SMART, CPU SR30, standard CPU, AC/DC/relay, onboard I/O: 18 DI 24 V DC; 12 DQ relay 2 A; power supply: AC 85 – 264 V AC at 47-63 Hz program/data memory 30 KB

CPU SR40, AC/DC/Relay, 24DI/16DO
6ES7288-1SR40-0AA1
SIMATIC S7-200 SMART, CPU SR40, CPU, AC/DC/relay, onboard I/O: 24 DI 24 V DC; 16 DQ relay 2 A; power supply: AC 85 – 264 V AC at 47-63 Hz program/data memory 40 KB web server support

CPU SR60, AC/DC/Relay, 36DI/24DO
6ES7288-1SR60-0AA1
SIMATIC S7-200 SMART CPU CR60s, COMPACT CPU, AC/DC/RELAY, ONBOARD I/O: 36 DI 24V DC; 24DO RELAY 2A; POWER SUPPLY: AC, 85 – 264 V AC AT 47 – 63 HZ, PROGRAM/DATA MEMORY: 20 KB

CPU ST20, DC/DC/DC, 12DI/8DO
6ES7288-1ST20-0AA1
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

CPU ST30, DC/DC/DC, 18DI/12DO
6ES7288-1ST30-0AA1
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 server

CPU ST40, DC/DC/DC, 24DI/16DO
6ES7288-1ST40-0AA1
SIMATIC S7-200 SMART, CPU ST40, CPU, DC/DC/DC, onboard I/O: 24 DI 24 V DC; 16 DO 24 V DC; power supply: DC 20.4 – 28.8 V DC, program/data memory 40 KB web server support

CPU ST60, DC/DC/DC, 36DI/24DO
6ES7288-1ST60-0AA1
SIMATIC S7-200 SMART, CPU ST60, CPU, DC/DC/DC, onboard I/O: 36 DI 24 V DC; 24 DO 24 V DC; power supply: DC 20.4 – 28.8 V DC, program/data memory 50 KB