Keba Kemro KeTop T10, Руководство по проектированию устройства

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Information
At the KeTop, the enabling control devices always feature two circuits.
To meet the safety category 4 PL e in accordance with EN ISO 13849-1, the
enabling control device must be realized with 2 circuits and these circuits have
to be dynamically monitored on short circuits and shunt currents. These two
circuits have to be concurrent considering the operating cycle with respect to
the B
10d
value of the safety device. The safety category 4 PL e means that one
single failure most not lead to the loss of the safety function and one single
failure is detected during or before the next request (e.g switching-on or at the
end of a machine cycle).
The monitoring of the simultaneity by the control relay is necessary, because
otherwise maybe a failure culmination would not be recognised and this would
cause the loss of safeness.
According to the EN60204-1 the enabling control devices shall be implemented
in such a way, that at position 1 (Off function - the control element is activeted)
and position 3 (Off function - the control element is pressed down to panic
position) at least one of the stop categories 0, 1 or 2 is initialized.
For calculation of the PL for the safety function "enabling" the safety-related
characteristic values (B
10d
-values) of all involved components have to be in-
cluded. For details for calculating the PL for the whole safety function see
EN ISO 13849-1, chapter 6.3, appendix H and appendix I.
6.3.2 Example of Connection with control relay (PILZ PNOZ)
CAUTION
Technical data of the control relay have to be observed in the final application!
Otherwise it is possible that the rated voltage tolerance of the KeTop is limited.
The following example is a support for realizing the end application.
KeTop T10 Connection and wiring
© KEBA 2014
Project engineering manual V1.02 31