3. Diagnostics
3-5
Festo P.BE-CTEU-PB-OP+MAINT-EN en 1208NH English
3.2.2 PS-LED status display
PS (Power System) – power supply
LED Process Status Meaning/error elimination
LED illumin-
ated green
ON
OFF
Normal operating status:
Operating and load voltage
present and in the permiss-
ible range
1)
–
LED flashing
green
ON
OFF
Under voltage in operating
or load voltage supply
• Bus node reports under voltage in
the operating voltage supply
• Connected device reports under-
voltage
1)
in the load voltage supply
at bus nodes
LED is off
ON
OFF
Operating voltage is not
present or not in the per-
missible range.
• Check operating voltage supply (pin
1and3)
1) Requirement: the connected device uses and monitors the load voltage
Tab. 3/2: Status displays of the device-specific “PS” L ED
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