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kbradio15

AB Compact Logix PLC 1769-L24ER-QB1B High failure rate.

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Been seeing a high failure rate on these PLC's, on 2 of our process. The control power is feed through a APC UPS to a 24VDC power supply to power the unit. Getting a hard fault where the OK LED comes on red and stays red. It never sequences through all the LED on power up. Tried the hard boot by holding in the reset button and applying power.

Has anyone on else seen a high failure rate on this model PLC? TIA..

 

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I have not ordered any of this unit, but saw a similar issue with the PowerFlex 4 VFD drives about 10 years ago or so.  

In that instance I worked with my local RA distributor and they arranged a bulk drop shipment of replacement units once RA identified the manufacturing issue.

Not say that is your case, but only your local RA distributor would know for sure.

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