hi alecn50.
W5500 is an operation to the length of the cable 120m. If you want to send the W5500 can give samples. Try considered.
You say the firmware is not a problem, we want to try your review. Are you okay?
There is a possibility that there is a problem that you have not discovered. We’ll review.
And your circuit recommend trying one more check.
I will attach the circuit that we recommend.
Thank you.
W5200E01-M3 REV115_20140625.pdf (157 KB)