Siemens S7-300 Cartão SM321 16DI - 6ES7321-1BH00-0AA0
Siemens S7-300 Cartão SM321 16DI - 6ES7321-1BH00-0AA0
SIMATIC S7-300 SM321 Digital Input, 16-P, Sink, 24VDC
SM 321 Digital Input Module, (16) 24V DC Digital Inputs, Sinking, 20-Pin, Optically Isolated
https://mall.industry.siemens.com/mall/en/us/Catalog/Product/6ES73211BH000AA0
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