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TL-POE150S does not show a detection signal

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TL-POE150S does not show a detection signal

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TL-POE150S does not show a detection signal
TL-POE150S does not show a detection signal
2024-06-06 14:10:48 - last edited 2024-06-07 01:42:50
Model: TL-POE150S  
Hardware Version:
Firmware Version:

Hi there,

I am testing your TL-POE150S with one of my devices, but the power line of my device is allways 0V. I took a look with the oscyloscope at the voltage between the pins 7/8 and 5/4 of the ethernet cable that comes from your device since I expected to see a detection signal of 2-10V once i plug it to the power or after a while. But i dont see anything. 

Can you help me here? 

Thank you so much in advance. 

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Re:TL-POE150S does not show a detection signal -Solution
2024-06-07 01:37:35 - last edited 2024-06-07 01:42:50

Hi @NasCraftsman 

Thanks for posting in our business forum.

NasCraftsman wrote

After some testings i see that the signals your PoE device is using are the 1/2 and the 3/6 ... so it is a Mode A device, not Mode B. Do you have any device that operates in Mode B ( pins 4/5 and 7/8) ?

No. Common Questions About 802.3 PoE

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Re:TL-POE150S does not show a detection signal
2024-06-06 14:15:52
After some testings i see that the signals your PoE device is using are the 1/2 and the 3/6 ... so it is a Mode A device, not Mode B. Do you have any device that operates in Mode B ( pins 4/5 and 7/8) ?
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#2
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Re:TL-POE150S does not show a detection signal
2024-06-06 17:00:54

  @NasCraftsman After manually modification of the ethernet cable i got: 

A detection voltage of : 3.8V 
A classification voltage of: 7.8V ( what in my opinion is not correct ) 
A supply power of 48V

But after 500ms of the 48V power delivey, the process starts again.
 

What is happening here ?  

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#3
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Re:TL-POE150S does not show a detection signal -Solution
2024-06-07 01:37:35 - last edited 2024-06-07 01:42:50

Hi @NasCraftsman 

Thanks for posting in our business forum.

NasCraftsman wrote

After some testings i see that the signals your PoE device is using are the 1/2 and the 3/6 ... so it is a Mode A device, not Mode B. Do you have any device that operates in Mode B ( pins 4/5 and 7/8) ?

No. Common Questions About 802.3 PoE

Recommended Solution
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  2  
#4
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