EUCHNER EKS - Description of the application example without enabling switch; Feedback loop; Start

Manual EKS Electronic-Key Adapter USB
Page 20/44 Subject to technical modifications 094485-04-11/13
The safety relay is de-energized without a time delay (stop category 0) and the machine movement is stopped if
 the Electronic-Key is removed or
 the machine control system cancels the enable state (switching contact A100.0 is opened).
Information!
The switching contact A100.0 is only allowed to be set if

the related Electronic-Key is inserted and

a suitable operating mode is selected.
6.2.2.2 Feedback loop
The safety relay can be started only with the feedback loop closed. A welded contactor contact in the enable
path will thus be detected when a start request is made and a start is then prevented. The power contactor must
have positively driven contacts.
6.2.2.3 Start
The safety relay start is given after enabling by the EKS FSA and by the control system, and after operation of
the start button.