SIPLUS PCS 7 SM 321 16DI for medial exposure with conformal coating based on 6ES7321-7TH00-0AB0 . Digital "input ""16 DI; 24 V DC, 1x" "40-pole,"" diagnostics-capable," for contacts (wired/ not wired), NAMUR encoder, 3/4-wire "BERO, with chatter ""monitor