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Split from DI 16x230VAC BA.

M_Sultan

We are experiencing a recurring issue with the DI 16x230VAC 6ES7521-1FH00-0AA0 channels in some of our remote I/Os in the field. These channels are frequently getting damaged.

When a channel is damaged, it exhibits flickering behavior, turning on and off at a high frequency. Upon checking the current, I found that the damaged channels are drawing less than 4 mA, while functioning channels should show a current greater than 10 mA to 11 mA.

What could be causing this issue, and how can we protect the channels to prevent further damage?

Please don't post twice for the same problem.

You also made a own topic for your problem:

DI 16x230VAC 6ES7521-1FH00-0AA0 channel damage 

Closed because posted twice. The active topic can be found following the link posted above.

Kind regards, Moderator_Lan