Siemens 6ES7921-3AA20-0AA0The Siemens 6ES7921 3AA20 0AA0 is a versatile programmable logic controller (PLC) module from the highly regarded SIMATIC S7 200 series, renowned for its compact and efficient design tailored for reliable industrial automation. This module boasts a powerful CPU 212 2 AC DC, capable of processing at 24 MHz, and is adaptable to both AC and DC power supplies with requirements of either 24 V DC or 100 240 V AC. With 32 KB of program memory, 2 KB of data