SIPLUS S7-300 SM 323-20-pin. based on 6ES7323-1BH01-0AA0 with conformal coating, -40.+70°C, digital module electrically isolated 8DI and 8DO, DC 24V, 0.5A total current 2A Like the CPU, the digital input and output modules are also protected against extreme environmental conditions. Thanks to the 100% conformal coating, they withstand biological, chemical and mechanically active substances, condensation, frost and harmful gases. No matter what the conditions - your digital signals are reliably recorded.