SIMATIC S7-300, digital input SM 321, isolated, 16 DE, AC / DC 24-48V with single root, 1x 40-pin - 6ES7321-1CH00-OAAO - Siemens
 "6ES7321-1CH00-OAAO"){kind=small}
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SIMATIC S7-300, digital input SM 321, isolated, 16 DE, AC / DC 24-48V with single root, 1x 40-pin - Siemens
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