6ES7221-1BH32-0XB0 Digital Input SM 1221, 16DI, 24V DC SIMATIC S7-1200, Digital input SM 1221, 16 DI, 24 V DC, Sink/Source
6ES7321-1BH02-0AA0 SM321, 16DI, DC24V SIMATIC S7-300, Digital input SM 321, isolated, 16 DI, 24 V DC, 1x 20-pole
Siemens 6ES7972-0BB52-0XA0 Brand New And Original. PLC Controller Module. It is on sale now, with special price！
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