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Bosch Rexroth AG
System overview
4.5.3
Calculating the total PFH value of a safety zone
Variable
Value
PFH
See manufacturer's specification
Selection_discrete
KCU02.2: 1.5×10
PFH
KCU02
KCU02.3, preliminary: 1.5×10
L3: 0.5×10
PFH
Axis_x
L4: 1.5×10
LSA Control S.L. www.lsa-control.com [email protected] (+34) 960 62 43 01
Rexroth IndraDrive Integrated Safety Technology "Safe Torque Off" (as of MPx-16)
"Mission Time" and "Proof Test" interval
●
The "Mission Time" of all components used must be
observed and complied with. After the "Mission Time" of a
component has elapsed, the component must be discarded
or replaced. It is not allowed to continue operating the
component!
●
After the component was discarded ("Mission Time" has
elapsed), it must be ensured that it cannot be reused (e.g.,
by disabling it).
●
There is no specified "Proof Test" for the IndraDrive system.
Therefore, the "Mission Time" cannot be reset by a
"Proof Test".
To determine the required total PFH value of an installation or a safety zone,
the PFH values of the individual axes and of the required external
components must be used for calculation as follows. The figure below
illustrates all the components relevant to the calculation:
External component
1)
Only for IndraDrive Mi with L3 option
2)
Fig. 4-11:
Determining the PFH for a safety zone
To calculate the PFH value of a safety zone, a valid PFH value must be
available for all components which have an influence on the safety function (if
necessary, procure the PFH value from the component manufacturer).
1)
External component
2)
Only for safety zone with at least one IndraDrive Mi with L3 op‐
tion
Fig. 4-12:
Formula to calculate PFH for a safety zone
The following conditions/restrictions apply to the general use of the formula
for PFH calculation for a safety zone:
Description
Enter the sum of the individual PFH values of the switches
or safety devices involved in the selection.
This value depends on the drive connection box that is used.
-9
1/h
Enter "0" for this variable, if no IndraDrive Mi with L3 option
-9
1/h
has been included in the safety zone.
-9
1/h
This value is independent of the safety level to be attained.
-9
1/h
Tab. 4-6:
Variable description to calculate PFH for a safety zone
DOK-INDRV*-SI3-**VRS**-AP06-EN-P
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