The following table lists the safety functions integrated in ACOPOSmulti inverter modules with SafeMOTION as well as the safety levels that can be achieved when they are used:

Safety function

EN ISO 13849-1

EN 61508 / EN 62061

Safe encoder evaluation required?

Safe Torque Off (STO)

Pl e

SIL 3

No

Safe Operation Stop (SOS)

Pl d

SIL 2

Yes

Safe Stop 1 (SS1)

Pl e (time monitored) / Pl d

SIL 3 (time monitored) / SIL 2

no (time monitored) / yes

Safe stop 2 (SS2)

Pl d

SIL 2

Yes

Safely Limited Speed (SLS)

Pl d

SIL 2

Yes

Safe Maximum Speed (SMS)

Pl d

SIL 2

Yes

Safe Direction (SDI)

Pl d

SIL 2

Yes

Safe Limited Increment (SLI)

Pl d

SIL 2

Yes

Safe Brake Control (SBC)

Pl e

SIL 3

No

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