EUCHNER EKS FSA with Ethernet Interface - Manual (Page 22)

Manual EKS Electronic-Key Adapter Ethernet
The switching contact LA1/LA2, in series with a switching contact on the enabling switch, is connected to the
first input on the safety relay. The switching contact A100.0 is connected to the second input on the safety relay
in series with the second switching contact on the enabling switch. The result is that these inputs on the safety
relay are only enabled if
f the EKS-FSA (switching contact LA1/LA2) and
f the control system (switching contact A100.0) issue the related release and
f the enabling switch is actuated.
The output contacts on the safety relay are only released after actuation of the enabling switch.
The safety relay is de-energized without a time delay (stop category 0) and the machine movement is stopped if
f the Electronic-Key is removed or
f the enabling switch is released or
f the machine control system cancels the release (contact A100.0 is opened).
Note: The control system output A100.0 is only allowed to be set if
f the related Electronic-Key is inserted and
f a suitable operating mode is selected.
6.4.1.2 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.
6.4.1.3 Start
The safety relay start takes place after release by the EKS FSA and by the control system and after operation of
the enabling switch.
Page 22/40 Subject to technical modifications 100420-02-01/09