24vdc input with POE support -TSW-202

Networking Solutions
1

We’re installing one TSW-101 and one TSW-202 aboard a vehicle. These are powered by 24vdc and the TSW-101 works fine but the TSW-202 needs 48VDC in order to enable the POE ports.

Is it possible to mimic the TSW-101 by disabling half of the POE ports on the TSW-202?
We are only needing two of the eight ports to be POE a/f enabled. But since we’re powering the 202 with 24vdc, none of the ports are providing POE.

3

Greetings, @ConfluenceJake ,

Welcome to Teltonika Community!

Thank you for your inquiry regarding the TSW‑202 switch.

The TSW‑202 will not provide PoE when powered with 24 VDC. PoE on this model requires a higher input voltage (44–57 V) to operate. When using 24 VDC, the switch will function for data switching, but the PoE ports will remain inactive because the internal PoE circuitry does not receive sufficient voltage to deliver power.

There is no supported method to selectively enable some PoE ports at 24 V; PoE functionality is tied directly to the input voltage and cannot be activated through software or port configuration.

If you require PoE in a 24 V system, there are two recommended approaches:

  1. Use a switch designed for 24 V input with PoE support, such as the TSW101, which can deliver PoE at lower voltages.
  2. Add a DC‑DC converter to step up your 24 V supply to ~48 V, which will allow the TSW‑202 to provide full PoE output.

Please let us know your PoE power requirements, and we can help you identify the most suitable solution for your setup.

Best regards,
V.

4

Yes, thank you. I came to this same conclusion. I’ve ordered a step up 24vdc→48vdc converter to test on the TSW-202.

What would be perfect is for the TSW-101 to be a managed switch. We’re seeing issues with the 101’s locking up after 30 minutes of use, but the 202 is working fine. We just can’t power our cameras off the 202, so we’re considering using 212’s and adding POE injectors, or using 202’s with a step-up converter. If you have recommendations on the step-up converter, we’re open to suggestions. We just need it to be DIN rail mountable.

5

Greetings,

I hope this message finds you well.

Please note that Teltonika does not manufacture or supply DC-DC or PoE voltage converters. Therefore, we recommend looking for a reliable third-party solution that could help resolve the powering issue.

A suitable DC-DC converter or PoE power solution from a trusted manufacturer should allow you to achieve the required input voltage for PoE functionality. We recommend consulting the converter supplier to ensure compatibility with your installation and power requirements.

If you need any additional clarification or have further questions, please feel free to let me know.

Kind regards,
V.