SIPLUS S7-300 SM 321-20-pin. -40...+70°C with conformal coating conformity with EN 50155 T1 Cat 1 Kl A/B based on 6ES7321-1BH02-0AA0. Digital input isolated 16 DE, DC 24V, 1x 20-pin SIPLUS S7-300 SM 321-20-pin. -40...+70°C with conformal coating Conformity with EN 50155 T1 Cat 1 Class A/B based on 6ES7321-1BH02-0AA0, digital input isolated 16 DI, DC 24V, 1x 20-pin SIPLUS S7-300 digital module input SM 321, DI 16xDC 24 V -40 ... +70°C with conformal coating EN 50155 T1 Cat 1 Class A/B based on 6ES7321-1BH02-0AA0