Siemens SIMATIC PLC 6AG1212-1HE31-2XB0 "SIPLUS S7-1200CPU 1212C DC/DC/RLY    -40 ... +70 DEGREES C    WITH CONFORMAL COATING    BASED ON 6ES7212-1HE31-0XB0    .    COMPACT CPU, DC/DC/RLY,    ONBOARD I/O:    8 DI 24V DC     6 DO RELAY 2A    2 AI 0 - 10V DC    POWER SUPPLY:    20,4 -28,8 V DC    PROGRAM/DATA MEMORY: 50 KB"     6AG12121HE312XB0