Siemens 6SE7021-8TB31-ZThe Siemens part number 6SE7021 8TB31 Z is a compact yet powerful programmable logic controller (PLC) from the S7 200 series, designed for diverse automation and manufacturing applications. This versatile device operates efficiently in temperatures ranging from 20C to 60C and is powered by 24V DC, consuming only 2W. It features robust memory options with 16 KB of RAM and 64 KB of ROM, along with various communication ports, including RS232, RS485, and
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