SIMATIC S7-300, Digital input SM 321, isolated, 16 DI, 48-125 V DC, 1x 20-pole
6ES7321-1CH20-0AA0 : SM321, 16DI, DC48-125V
SKU: 6ES73211CH200AA0
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SIMATIC S7-300, Digital input SM 321, isolated, 16 DI, 48-125 V DC, 1x 20-pole