SIPLUS S7-300 SM 326F DI8 NAMUR for medial exposure with conformal coating based on 6ES7326-1RF01-0AB0 . Digital input "SM 326. 8 DI 24 V DC. NAMUR. fail-safe NAMUR input for SIMATIC S7 F-systems. up to Category 4 (EN 954-1)/ SIL3 (IEC 61508)/PLE (ISO 13849). 1x 40-pole