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Old January 10th, 2018, 03:15 AM   #1

yfcarer is offline
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Join Date: Apr 2006
Location: Tianjin
Posts: 82
Lightbulb 1769-OB32 problem

Hi Gents:

I met a problem with one of my 1769-OB32 module. Some of the channels suddenly malfunction -- The light indications for the channel are showing right status for ON/OFF, but the output voltage is wrong. When I force channel off, I can get 24VDC from the terminails, while when I force it on, I can measure 18VDC. Meanwhile, most of other channels are working right, that no voltage when off and 24VDC when it is on.

Any thoughts? Thank you.
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Old January 10th, 2018, 05:31 AM   #2
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janner_10 is offline
Join Date: Dec 2014
Location: Tewkesbury
Posts: 674
Sounds like that output transistor has failed, you can either move the output to a spare that works or replace the card.
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