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6 Safety-related applications
6.11
Notes for operation
In normal operation, the green LED (PWR) lights up continuously.
The yellow LEDs (OUT1/OUT2) display the switching status of the relay output.
The red LEDs (LF1/LF2) display faults that occur when line fault detection is switched on. The safe state
is adopted once a line fault is detected or if the voltage supply fails.
6.12
Start and restart
Switching on the device or switching it on again
The output moves into the state without oscillating (as per the operating mode table on 16). A reset is
not provided for.
What happens after a line fault has been determined or what does the user have to do afterwards?
The fault is displayed by the red LED and the output goes into the state "not conductive" independently
of the input signal and operating mode (standard operation or inverse operation). The user has to rectify
the line fault (short-circuit or break in the sensor line).
The device output is not blocked once fault detection is triggered (no lock or reset). Undefined line states
that occur during repair may result in switching the output. The user has to prevent this by switching off
the voltage supply or by disconnecting the connection terminals.
Other possibilities that lead to the same result and do not cause any additional hazards are admissible.
The line fault is rectified
The user must ensure a defined state using the operating mode table on 16. The device is put into op-
eration again as during initial start-up. The device behaves as described under "Switching on the device
or switching it on again".
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