Pilz PMCprimo DriveP.01/AA0/4/0/0/208-480VAC - Manual (Page 96)

9.2 Safety characteristic data
9 Technical Details
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: [email protected]
9-4
SI_Kennzahlen_protego S_ein_Geber_MTTF_57_Einl
The characteristic data is valid when using a motor encoder with an
MTTF
≥ 57 years.
SI_Kennzahlen_protego S_ein_Geber_MTTF_Allg
The motor encoder is already included in the characteristic data, so no
more calculations need to be performed for the "Safe Actuator" subsys-
tem.
SI_Kennzahlen_protego S_ein_Geber_MTTF_57_Bild
SI_Kennzahlen_alle_Sicherheitsfunkt_protego S
The safety-related characteristic data is valid for all safety functions.
Si_Kennzahlen_Erläuterung_1
All the units used within a safety function must be considered when cal-
culating the safety characteristic data.
9.2.2 Safe actuator with two encoders
Safe actuator with two encoders 9- SI_Kennzahlen_protego S_zwei_Geber
SI_Kennzahlen_protego S1_zwei_Geber
The safety analysis of the plant or machine may necessitate a second
encoder (external encoder). Example: Fault detection in the mechanical
transmission path between motor and process.
The sensor subsystem consists of the motor encoder (sensor 1) and an
external encoder (sensor 2). A separate PL or SIL must be calculated for
this subsystem. For this subsystem structure, Category 3 with a DC of
99 % is acceptable. The following characteristic data is required for both
sensors (motor encoder and external encoder): MTTF
d
and λ
d
/ λ .
SI_Kennzahlen_protego S1_zwei_Geber_Bild
Safety characteristic data
Device Operating mode
EN ISO 13849-1
PL EN 954-1
Category EN IEC 62061
SIL CL
PFH [1/h] t M [year]
Safety card
Safe actuator PL e (Cat. 4) Cat. 4 SIL CL 3 1.19E-08 20
Subsystem
Safe actuator
PMCprotego D
PMCprotego S1
Motor encoder with MTTF ³ 57 years