Description:
Safe De-Energization (SDE), up to category 1, up to PL c;
Prevention of unexpected start-up (PUS), up to category 3, up to PL e;
Channel 1 (working valve): 3/2-way, closed, electrically actuated, pilot actuated, mechanical spring, positive overlap, monitoring by pressure switch;
Channel 2 (working valve): 3/2-way, closed, electrically actuated, pilot actuated, mechanical spring, monitoring by limit switch piston spool;
Safety Application Note with a possible implementation of the safety sub-functions SDE and PUS. Included is the basic circuit, safety-related block diagram, Sistema project, FluidDraw project, characteristics of suitable products and a product list of suitable products from Festo.