Allen Bradley 1769-OF8V max voltage problem [SOLVED]

2 posts in this topic

Good day,

I have Allen Bradley Compact Logix PLC with few I/O cards, there are 5 analog output cards amongst them.

Today one of the analog cards does not provide more then 3.8 Volt on the outputs. Any voltage between 0 and 3.8 V is supplied correctly, whereas anything above it results in 3.8 V only.

The card does not report any errors to PLC. Other cards do not have this problem.

The PLC was running non-stop for couple of years and yesterday it was turned off for an hour. The problem started right after this.

I have checked the module settings and verified that the output is not limited to 3.8V

Can anyone give any advice in regards to this situation?

Edited by Nikolay
Problem solved

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The card has stopped working today.

So, what I described in the first post is an indicator of the card dying.

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