Festo CTEU-EC, Description

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3. Diagnostics
3-5
Festo P.BE-CTEU-EC-OP+MAINT-EN en 1208NH
3.2.2 PS LED status display
PS (power system) – power sensor/logic supply
LED Process Status Meaning/error elimination
LED illuminated
green
ON
OFF
Normal operating status:
– Operating voltage present (in
the approved range)
– Load voltage present (in the
approved range)
1)
–
LED flashes
green
ON
OFF
– Operating voltage is below
the required voltage
– Load voltage is below the re-
quired voltage
1)
•
Eliminate undervoltage at the
connected device
LED is off
ON
OFF
Operating voltage not present
•
Check the power supply
1)
Display depends on whether the connected device monitors the load voltage and reports this to
the bus node
Tab. 3/2: Status displays of the device-specific “PS” LED