Danfoss Vacon OPTEA Operating Manual page 34

VACON® NXP Advanced Safety Options
Operating Guide
• PFH
• Category
• Performance level
For the diagnostic coverage for the encoder, see
Table 11: Achievable Safety Levels when Using Speed Sensors without Certificate
Safety Sin/Cos
function
STO SIL 3, PLe,
(+SBC) Cat4
SS1 SIL 3, PLe,
Cat4
SS2, SOS SIL 2, PLd,
Cat3
SQS-STO SIL 3, PLe,
Cat4
SQS-SS1 SIL 3, PLe,
Cat4
SQS-SS2 SIL 2, PLd,
Cat3
SLS SIL 2, PLd,
Cat3
SMS SIL 2, PLd,
Cat3
SSM SIL 2, PLd,
Cat3
SSR SIL 2, PLd,
Cat3
Only if the monitored limits to both directions are set to the same value or both values are greater than the value of Allowed Deviation of Speed
1
Sources.
Only if the monitored limits to both directions are set to the same value.
2
Table Table 11 gives the maximum SIL, PL, and Cat levels that can be achieved with a combination. Other factors than speed meas-
urement can be the limiting factor on system level. For example, either SIL 2 or SIL 3 can be achieved with the OPTAF STO option
board as a single final element. See the VACON
For non-safe Sin/Cos encoders, it is required in the table
model "Exchange of Sin and Cos signal inside the encoder" must be excluded.
Combinations that are not listed in the table
It can still be possible to use unlisted combinations. Regardless of the used speed measurement combination, it is the responsibility
of the system designer to make sure that the used combination is adequate and sufficient.
When multiple speed sources are used, the monitored limit of a safety function must not be set below the value of Allowed Devi-
ation of Speed Sources.
34 | Danfoss A/S © 2021.06
3.6.6 Encoder Signal
Digital Pulse + 2 x Proximity
estimated sensor
speed
SIL 3, PLe, Cat4 SIL 3, PLe,
Cat4
SIL 3, PLe, Cat4 SIL 3, PLe,
Cat4
- -
SIL 3, PLe, Cat4 SIL 3, PLe,
Cat4
SIL 3, PLe, Cat4 SIL 3, PLe,
Cat4
- -
SIL 2, PLd, Cat2 SIL 3, PLe,
Cat4
SIL 2, PLd, SIL 3, PLe,
Cat2 Cat4
(1) (2)
SIL 2, PLd, Cat2 SIL 3, PLe,
Cat4
SIL 2, PLd, Cat2 SIL 3, PLe,
Cat4
NX OPTAF STO Board Manual for further information.
®
N O T I C E
Table 11
Table 11 are not tested or supported, and offer no increase to the claimed safety levels.
N O T I C E
Verification.
Proximity sen- Sin/Cos + prox-
sor + estima- imity sensor
ted speed
SIL 3, PLe, Cat4 SIL 3, PLe, Cat4
SIL 3, PLe, Cat4 SIL 3, PLe, Cat4
- SIL 2, PLd, Cat3
SIL 3, PLe, Cat4 SIL 3, PLe, Cat4
SIL 3, PLe, Cat4 SIL 3, PLe, Cat4
- SIL 2, PLd, Cat3
SIL 2, PLd, Cat2 SIL 3, PLe, Cat4
SIL 2, PLd, SIL 3, PLe,
Cat2 Cat4
(1) (2)
SIL 2, PLd, Cat2 SIL 3, PLe, Cat4
SIL 2, PLd, Cat2 SIL 3, PLe, Cat4
that the encoder is implemented in analog design. The fault
Overview of the System
Digital Pulse + Any other
proximity combina-
sensor tion
SIL 3, PLe, Cat4 SIL 3, PLe,
Cat4
SIL 3, PLe, Cat4 SIL 3, PLe,
Cat4
- -
SIL 3, PLe, Cat4 SIL 3, PLe,
Cat4
SIL 3, PLe, Cat4 SIL 3, PLe,
Cat4
- -
SIL 3, PLe, Cat4 -
SIL 3, PLe, -
Cat4
(2)
SIL 3, PLe, Cat4 -
SIL 3, PLe, Cat4 -
AQ319736045637en-000101 / DPD01798