Pilz PMCprimo DriveP.06/AA0/4/0/0/208-480VAC - Manual (Page 73)

Technical details
Operating Manual PMCprotego S2­2(­C)
1002529­EN­02 73
9.1 Safety characteristic data
9.1.1 Safe actuator with one encoder
Please note the following fault detection guidelines:
When the drive is operated with an encoder (standard motor encoder on the servo ampli­
fier), a fault on the encoder system is detected by the safety card as follows:
} Rotary synchronous motors
Detected within one mechanical revolution of the motor.
} Linear synchronous motors
Detected within the distance travelled, in accordance with the following formula:
Distance = (Number of poles /2) · Pole pair pitch
Commands in the servo amplifier:
– Number of poles: MPOLES
– Pole pair pitch: MPITCH
9.1.1.1 MTTF >= 10 years
Operating
mode EN ISO
13849­1:
2008
PL
EN ISO
13849­1:
2008
Category
EN IEC
62061
SIL CL
EN IEC
62061
PFH
D
[1/h]
IEC 61511
SIL
IEC 61511
PFD
EN ISO
13849­1:
2008
T
M
[year]
Safe actu­
ator
PL d Cat. 3 SIL CL 2 1,35E­07 SIL 2 1,72E­03 20
This operating mode requires a motor encoder with MTTF ≥ 10 years.
The motor encoder is already included in the characteristic data, so no more calculations
need to be performed for the "Safe Actuator" subsystem.
Subsystem
Safe actuator
PMCprotego D
PMCprotego S2
Motor encoder with MTTF ³ 10 years
The safety­related characteristic data is valid for all safety functions.
All the units used within a safety function must be considered when calculating the safety
characteristic data.