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This document provides recommendations on how the load voltage of the valve terminal MPA-FB-VI, MPAL, VTSA-F-CB, VTUG and VTUX can be safely switched off. It is planned to expand this document with information on other valve terminals.

Safe Torque Off (STO), up to category 1, up to PL c;
Prevention of unexpected startup (PUS), up to category 2, up to PL d;
Channel 1 (working valve): 2 x 3/2, closed, monostable, electrically actuated, pilot actuated, mechanical spring, monitoring by limit switch drive.
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, FluidSim project, characteristics of suitable products and a product list of suitable products from Festo.

STO, up to category 2, up to PL d;
PUS, up to category 2, up to PL d;
Channel 1 (working valve): 2 x 3/2 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.

STO, up to category 1, up to PL c;
PUS, up to category 3, up to PL e;
Working valve (CH1): 2 x 3/2, closed, monostable, electrically actuated, pilot actuated, mechanical spring, positive overlap, limit switch drive
Operation pressure (CH2):3/2 closed, electrically actuated, pilot actuated, mechanical spring, monitoring pressure
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): 2 x 3/2 exhausted, electrically actuated, overlap, 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.

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 pressure switch
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, monitoring by pressure switch
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.

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, overlap, mechanical spring, monitoring by pressure switch
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): 2 x 3/2 exhausted, electrically actuated, overlap, 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.

Working valve: any:

STO, up to Category 4, up to PL e;
PUS, up to Category 4, up to PL e;
Channel 1: 6/2 exhausted, electrically actuated, negative lap, pilot-operated, mechanical spring, monitored by limit switch piston spool
Channel 2: 6/2 vented, electrically actuated, pilot-operated, mechanical spring, monitored by limit switch piston spool
Safety application note with a possible implementation of the safety subfunctions STO and PUS using the VOFT valve block. Included are the basic circuit, safety-related block diagram, Sistema project, FluidDraw project, characteristics of suitable products, and a product list of suitable products of Festo.

STO, up to Category 1, up to PL c;
PUS, up to Category 1, up to PL c;
Channel 1: 6/2 exhausted, electrically actuated, pilot-operated, mechanical spring, monitored by limit switch piston spool
Safety application note with a possible implementation of the safety subfunctions STO and PUS using the VOFT valve block. Included are the basic circuit, safety-related block diagram, Sistema project, FluidDraw project, characteristics of suitable products, and a product list of suitable products of Festo.

Safety Application Note with a test cycle as diagnosis for the safety sub-function SSC when 5/3-way valves, closed, or using pilot operated check valves.

Safe Closing (SC), up to category 1, up to PL c;
Working valve (CH1): 5/4-way, exhausted, electrically actuated, pilot actuated, mechanical spring;
Safety Application Note with a possible implementation of the safety sub-functions SC. Included is a description, basic circuit, safety-related block diagram, Sistema project, FluidDraw project, characteristics of suitable products and a product list of suitable products from Festo.

Safe Closing (SC), up to category 3, up to PL d;
Working valve (CH1): 5/4-way, exhausted, electrically actuated, pilot actuated, mechanical spring, monitoring limit switches drive;
Operation pressure (CH2): 3/2-way valve, closed, electrically actuated, pilot actuated, mechanical spring, monitoring pressure switch;
Safety Application Note with a possible implementation of the safety sub-functions SC. Included is a description, basic circuit, safety-related block diagram, Sistema project, FluidDraw project, characteristics of suitable products and a product list of suitable products from Festo.

Safety Application Note with the definitions of the safety sub-functions "Safe De-energization (SDE)" and the related safety sub-function "Prevention of Unexpected Start (PUS)" for pneumatic circuits and their safe condition. For practical implementation, additional notes are given which should be observed depending on the application.

Safety Application Note with the definitions of the monitoring function

"Static Brake Test (BT-s)" for pneumatic circuits and the possible results. For practical implementation, additional notes are given which should be observed depending on the application.

Safety Application Note with the definitions of the safety sub-functions "Safe Blocking with Positive Locking (SB-p)" and the related safety sub-function "Prevention of Unexpected Start (PUS)" for pneumatic circuits and their safe condition. For practical implementation, additional notes are given which should be observed depending on the application.

Safety Application Note with the definitions of the safety sub-function "Safe Closing (SC)" for pneumatic circuits and their safe condition. For practical implementation, additional notes are given which should be observed depending on the application.

Document contains a possible evaluation of the SIL suitability of directional control valves as an element according to IEC 61508, High Demand Mode for safety sub-functions pneumatics SDE (Safe Deenergization) and PUS (Prevention of Unexpected Start).

Document contains a possible evaluation of the SIL suitability of directional control valves as an element according to IEC 61508, High Demand Mode for safety sub-functions pneumatics STO (Safe Torque Off) and PUS (Prevention of Unexpected Start).

Document contains a possible evaluation of the SIL suitability of directional control valves as an element according to IEC 61508, High Demand Mode for safety sub-functions pneumatics STO (Safe Torque Off) and PUS (Prevention of Unexpected Start).

Document contains a possible evaluation of the SIL suitability of directional control valves as an element according to IEC 61508, High Demand Mode for safety sub-function pneumatics PUS (Prevention of Unexpected Start).

Safety Application Note with information about service units for the use with pneumatic safety subfunctions.