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SIPLUS S7-300 SM 321-20-pole -25...+70 °C with conformal coating Conformity with EN 50155 T1 Kat 1 Kl A/B based on 6ES7321-7BH01-0AB0 . Digital input Isolated 16 DI; 24 V DC, 1x 20-pole, process interrupt, diagnostics, suitable for isochronous mode operation

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