Support Portal

The following special provisions for the use of Festo Security Advisories (the "Special Provisions") apply in addition to and partially amend the Festo

STO, up to category 1, up to PL c;
PUS, up to category 2, up to PL d;
Channel 1 (working valve): 5/3 exhausted, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch.
Channel 2 (operation pressure): 3/2 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, characteristics of suitable products and a product list of suitable products from Festo.

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.

STO, category 1, PL c;
PUS, category 3, PL e;
working valve (CH1): 5/3 exhausted, electrically actuated, pilot actuated, mechanical spring, limit switch drive
operation pressure (CH2): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
pilot pressure (CH2): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
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.

STO, up to category 1, up to PL c;
PUS, up to category 3, up to PL e;
Channel 1 (working valve): 5/3 exhausted, electrically actuated, pilot actuated, mechanical spring, monitoring by limit switch drive
Channel 2 (operation pressure): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
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, characteristics of suitable products and a product list of suitable products from Festo.

STO, up to category 1, up to PL c;
PUS, up to category 3, up to PL e;
Channel 1 (working valve): 5/3 exhausted, electrically actuated, pilot actuated, mechanical spring, limit switch drive
Channel 2 (operation pressure ): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by limit switch piston spool
Channel 2 (pilot pressure ): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
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, characteristics of suitable products and a product list of suitable products from Festo.

PUS, category 3, up to PL e;
working valve (CH 1): 5/2-way bistable, electrically actuated, pilot actuated, limit switch drive
operation pressure (CH2): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by limit switch piston spool
pilot pressure (CH2): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
Safety Application Note with a possible implementation of the safety sub-function PUS for bistable valves. Included is a description, 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.

SB-f, up to category 1, up to PL c;
PUS, up to category 1, up to PL c;
Channel 1: Clamping unit, clamping via spring force, air to release; 3/2-way, closed, electrically actuated, pilot actuated, mechanical spring; static brake test
Channel 2: Clamping unit, clamping via spring force, air to release; 3/2-way, closed, electrically actuated, pilot actuated, mechanical spring; static brake test
Safety Application Note with a possible implementation of the safety sub-functions SB-f 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.

SDE, category 1, PL c;
PUS, category 3, PL e;
Working valve (CH1): 3/2 closed, electrically actuated, pilot actuated, positive overlap, mechanical spring, monitoring by pressure switch
Operation pressure (CH2): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
Pilot pressure (CH2): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
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, FluidSim project, Video, characteristics of suitable products and a product list of suitable products from Festo.

SDE, up to category 1, up to PL c;
PUS, up to category 3, up to PL e;
Channel 1 (working valve): 3/2 closed, electrically actuated, pilot actuated, positive overlap, mechanical spring, limit switch drive
Channel 2 (operation pressure ): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by limit switch piston spool
Channel 2 (pilot pressure ): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
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.

SDE, up to category 1, up to PL c;
PUS, up to category 3, up to PL e;
Channel 1 (working valve): 3/2 closed, electrically actuated, pilot actuated, positive overlap, mechanical spring, limit switch drive
Channel 2 (operation pressure ): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by limit switch piston spool
Channel 2 (pilot pressure ): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
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

SDE, up to category 3, up to PL e;
PUS, up to category 3, up to PL e;
Channel 1 (working valve): 3/2 closed, electrically actuated, pilot actuated, negative overlap, mechanical spring, limit switch drive
Channel 2 (operation pressure ): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by limit switch piston spool
Channel 2 (pilot pressure ): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
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.

CH 2 (operation pressure): 3/2 directional control valve, closed, monitoring pressure switch
CH 2 (pilot pressure): 3/2 directional control valve, closed, monitoring pressure switch

STO, up to category 1, up to PL c;
PUS, up to category 3, up to PL e;
Channel 1 (working valve): 5/2 directional control valve, monostable, electrically actuated, pilot actuated, mechanical spring, limit switch drive
Channel 2 (operation pressure ): 3/2 directional control valve, monostable, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
Channel 2 (pilot pressure ): 3/2 directional control valve, monostable, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
Safety Application Note with a possible implementation of the safety sub-functions SDI 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.

STO, up to category 1, up to PL c;
PUS, up to category 3, up to PL e;
Channel 1 (working valve): 2x3/2 exhausted, electrically actuated, pilot actuated, mechanical spring, limit switch drive
Channel 2 (operation pressure ): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
Channel 2 (pilot pressure ): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
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, characteristics of suitable products and a product list of suitable products from Festo.

In this Safety Application Note, possible circuits for the safe switch-off of individual valves in the various categories and PL are given.

PUS, category 3, PL e;
working valve (CH1): 5/2 bistable, electrically actuated, pilot actuated, monitoring by limit switch drive
operation pressure (CH2): 3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring by pressure switch
Safety Application Note with a possible implementation of the safety sub-function 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.

PUS, category 2, PL d;
Channel 1 (working valve): 5/2 bistable, electrically actuated, pilot actuated, monitoring by limit switch drive
Output of test equipment OTE (operation pressure): 3/2 closed, electrically actuated, pilot actuated, mechanical spring
Safety Application Note with a possible implementation of the safety sub-function 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.

SDE, up to category 4, up to PL e;
PUS, up to category 4, up to PL e;
Subsystem: MS6-SV-...-D Soft-start / quick-exhaust valve
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.

STO, up to category 1, up to PL c;
PUS, up to category 3, up to PL e;
Channel 1 (working valve): 5/3 exhausted, electrically actuated, pilot actuated, mechanical spring, monitoring by limit switch drive
Channel 2 (operation pressure): 3/2 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 STO 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.

A checklist to avoid EMC trouble

Festo Sustainability Report 2024

A page with links to the recommended application notes with definitions and circuits for the pneumatic safety sub-functions in the Festo Support Portal.

Safety subfunction STO, up to category 1, up to PL c;
Channel 1: Switch-off supply by conductor.
Safety subfunction STO, up to category 4, up to PL e;
Channel 1 and 2: Switch-off supply by conductor,
Safety Application Note with a possible implementation of the safety sub-functions STO. Included is the basic circuit, safety-related block diagram, Sistema project, FluidDraw project.

Application Note for the realization of the safety sub-functions safe torque off (STO) and prevention of an unexpected start-up (PUS) with category 1 and up to PL c. This Application Note contains possible circuits for 5/3, 3/2 and 2/2 directional control valves.

Application Note for the realization of the safety sub-functions safe stopping and closing (SSC) and prevention of an unexpected start-up (PUS) with category 1 and up to PL c. This Application Note contains possible circuits for 5/3, 3/2 and 2/2 directional control valves and delockable check valves.

Application Note for the realization of the safety sub-function prevention of an unexpected start-up (PUS) with category 1 and up to PL c. This Application Note contains possible circuits for 5/2 directional control valves.

Application Note for the realization of the safety sub-functions safe stop 1, time controlled (SS1-t), safe torque off (STO) and prevention of an unexpected start-up (PUS) with category 1 and up to PL c. This Application Note contains possible circuits for 5/3, 3/2 and 2/2 directional control valves.

Application Note for the realization of the safety sub-functions safe torque off (STO), prevention of an unexpected start-up (PUS) and safely-limited speed (SLS) with category 1 and up to PL c. This Application Note contains possible circuits for permanent oder switchable safely-limited speed (SLS).

Application Note for the realization of the safety sub-functions safe torque off (STO), prevention of an unexpected start-up (PUS) and safely-limited torque (SLT) with category 1 and up to PL c. This Application Note contains possible circuits for permanent oder switchable safely-limited torque (SLT).

Application Note for the realization of the safety sub-functions safe direction (SDI) and prevention of an unexpected start-up (PUS) with category 1 and up to PL c. This Application Note contains possible circuits for monostable 5/2 directional control valves.