Characteristic safety values STO

Characteristic values

EN 61800-5-2

EN ISO 13849-1

Tested safety class/standard basis

Safety Integrity Level SIL 3

Performance level e/category 3

Probability of dangerous failure per hour (PFHD value)

2.5 × 10-9 1/h

Service life

20 years, after which the component must be replaced with a new one.

Proof test interval

> 20 years

–

Safe state

Safe Torque Off (STO)

Safety sub-function

STO, SS1With suitable external control according to EN 61800-5-2

INFORMATION

In the case of single-pole wiring, the achievable performance level according to EN ISO 13849-1 is reduced to PL d, and the achievable Safety Integrity Level according to EN 61800-5-2 is reduced to SIL 2. A fault exclusion is necessary for the wiring between the safety relay and the STO input.