PSSu A ME5 (10×6 pcs.) 312955 PSSu, marker for potentials in the basic module, red/blue, PU 10x 6pieces, 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.