Description:
Safe Torque Off (STO), up to category 1, up to PL c;
PUS, up to category 2, up to PL d;
Channel 1 (working valve): 5/3-way valve, exhausted, electrically actuated, pilot actuated, mechanical spring, monitoring by limit switch drive.
Output test channel (operation pressure): 3/2-way valve, closed, electrically actuated, pilot actuated, mechanical spring.
Safety Application Note with a possible implementation of the safety sub-functions STO and PUS. Included is the basic circuit, safety-related block diagram, Sistema project, FluidDraw project, FluidSim project, characteristics of suitable products and a product list of suitable products from Festo.