***spare part*** SIPLUS S7-1200 SM 1223 16DI/16DQ/relay based on 6ES7223-1PL30-0XB0 with conformal coating, -25…+70 °C, digital input/output 16 DI/16 DQ, 16 DI 24 V DC, sink/source, 16 DQ, relay 2 A Just like the CPU, the digital input and output modules are also protected against extreme ambient conditions. Due to the 100% conformal coating they can withstand biologically, chemically and physically active substances, condensation, frost, and corrosive gases. Regardless of the conditions, your digital signals are reliably recorded.