PSSu A CE “L” yellow (10 pcs.) 312914 PSSu, coding elements for FS I/O and basic module, yellow, coding L, PU 10 pieces, packed in resealable polybag with marking sticker. PAS4000, the software for the automation system PSS 4000: Intuitive operation ✓ Hardware-independent ✓ Simple programming and configuration ✓ – Pilz – INT.