IFM Electronic Efector 100 GM505S, Operating Instructions Manual, Page: 13 / 21

13
UK
9.3 Cross faults
Cross faults are detected by the fail-safe sensor and lead to an error
message (permanently logic "1")� The pull-down current of the clock
generator must not exceed 30 mA as the fail-safe sensor can no longer
switch this current� An error message is no longer possible then�
9.4 Operating mode
The length of the preceding undamping determines whether the yellow LED
comes on with a delay (→ 9�4�1) or without delay (→ 9�4�2) when a target moves
into the enable zone� In any case, the output switches on without delay�
In case of undamping the output switches off and the yellow LED goes out without
delay�
In case of damping in the close range the output switches off immediately whereas
the yellow LED goes out with a delay of approx� 2 s� With the deactivation of the
LED the output is maintained in the safe state (logic "0")� Thus, switching on again
in the enable zone is not possible� Enabling is done by undamping (> 35 mm)
of more than 2 s or by interrupting the voltage (→ 5�2 Protection against simple
defeating)�
9.4.1 Delayed switching of the LED
Undamping > 2s:
35 0
> 3 s
mm
Signal
Power
If the target was away from the
sensor for more than approx� 2 s
(> 35 mm), the yellow LED goes on
with a delay of approx� 3 s in case of
damping in the enable zone�
This is also the case if the target is in
the enable zone when the voltage is
switched on�

Close range

Enable zone