SIPLUS S7-300 SM 321 16DI 0-1 threshold at approx. 11.2 V with conformal coating based on 6ES7321-7BH01-0AB0 . Digital "input SM 321, isolated, ""16 DI;" "24 V DC, 1x 20-pole,"" process" interrupt, diagnostics, suitable for isochronous mode operation
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