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en - Trouble-shooting
58
AC and DC-PNP versions with valve plug
Malfunction
Cause
Green light
No voltage supply
does not light up
Red light
Overload or short-circuit in the
flashes
load-current circuit
Internal sensor error or sensor corroded
DC-PNP versions with M12x1 plug
Malfunction
Cause
Red light
Overload or short-circuit in the
lights up
load-current circuit
(DC-PNP)
Green light
No voltage supply
does not light up
Red light
Internal sensor error or sensor corroded
flashes (2 Hz)
NAMUR
Malfunction
Cause
Green light
No voltage supply from switching
is not flashing
amplifier
Red light
Internal sensor error or sensor corroded Replace device
flashes (0.3 Hz)
Measure
Check plug, cable and voltage supply
Rectify short-circuit
Reduce maximum load current to
under 350 mA
Replace device
Measure
Rectify short-circuit
Reduce maximum load current to
under 250 mA
Check plug, cable and voltage supply
Replace device
Measure
Check plug, cable and voltage supply
Endress+Hauser
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