technology modules "L3" and "L4", the paragraph below shows how the PFH
value can be determined for a drive system and how additional external
components must be integrated.
4.5.2
Optional safety technology modules "L3" / "L4"
Drives equipped with the optional safety technology modules "L3" or "L4"
comply with the following "Safety Integrity Levels" (SIL) or "Performance
Levels" (PL):
●
Up to SIL3 according to IEC 62061
●
Up to Category 4, PL e according to ISO 13849-1
For the IndraDrive Mi system, there are the following "Safety
Integrity Levels" (SIL) or "Performance Levels" (PL), depending
on the drive connection box design that is used:
●
KCU02.2 / KCU02.3: SIL3 according to EN 61508,
IEC EN 62061 and IEC 61800-5-2
●
KCU02.2: Category 3, PL e according to EN ISO 13849-1
●
KCU02.3: Category 4, PL e according to EN ISO 13849-1
Depending on the "Safety Integrity Level" or "Performance Level" to be
attained, there are the following safety characteristics:
Description
L3:
SIL3 / PL e
L4:
SIL3 / PL e
PFH
1)
0,5×10
-9
1/h (0.5 % SIL3)
1,5×10
-9
1/h (1.5 % SIL3)
Mission Time
175,200 h (20 years)
175,200 h (20 years)
"Proof Test" interval
175,200 h (20 years)
175,200 h (20 years)
MTTF
d/channel
1)
> 200 years
> 200 years
DC
avg
>99 %
>99 %
Test interval
<1 h
<1 h
1)
The specified safety characteristics are achieved under the
conditions mentioned in the Project Planning Manual (see "Am‐
bient and operating conditions")
With the IndraDrive Mi system, the PFH value of the drive
connection box must be taken into account within the safety zone
in addition to the PFH values of the axis:
●
KCU02.2: <1,5×10
-9
1/h (1.5 % of SIL3)
●
KCU02.3: preliminary:<1.5×10
-9
1/h (1.5 % of SIL3)
The safety characteristics are independent of the motor type and
encoder type used.
The specified test interval applies to the selection via an "active"
safety selection device with OSSD outputs. The test interval of
the OSSD outputs must be smaller than specified above. When
the dynamization outputs of the safety option are used, the safety
option itself assures that the test interval is complied with.
DOK-INDRV*-SI3-**VRS**-AP06-EN-P
Rexroth IndraDrive Integrated Safety Technology "Safe Torque Off" (as of MPx-16)
Bosch Rexroth AG
41/149
System overview
LSA Control S.L. www.lsa-control.com [email protected] (+34) 960 62 43 01
