Business Community > Accessories > TL-POE150S does not show a detection signal
< Accessories

TL-POE150S does not show a detection signal

TL-POE150S does not show a detection signal

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. 

  0      
 
  0      
 
#1
Options
1 Accepted Solution
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

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update! ☛Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced.
Recommended Solution
  2  
  2  
#4
Options
3 Reply
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) ?
  0  
  0  
#2
Options
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 ?  

  0  
  0  
#3
Options
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

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update! ☛Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced.
Recommended Solution
  2  
  2  
#4
Options

Information

Helpful: 0

Views: 382

Replies: 3

Related Articles
POE150S - LAN in faulty?
844 0
 TL-POE150S Compatibility
1695 0
 TL-POE150S - broken?
944 0
 Use TL-POE150S with higher voltage?
1038 0
 EAP120 with TL-POE150S Power injector
1074 0
 TL-POE150S with y-cam POE camera
2109 0
About Us
Press
Copyright © TP-Link Systems Inc. All rights reserved.