This article applies to the TNA-301 and TNA-302 models.


Input Power


i  Important Notes

  • The input power should be 48VDC and a minimum of .5A (24W) is recommended.  
  • -48VDC is not currently supported.
  • Devices can not be powered by active PoE (802.3at, etc).
  • Devices support 2 or 4 pair power, and expect positive on 4/5 and negative on 7/8.

Devices can be powered two ways, either via:


  1.  The Passive Power over Ethernet (PoE) port or via
  2.  The DC input terminal.  


Both powering methods should not be used at the same time.  The input power should be 48VDC in both cases and a minimum of .5A (24W) is recommended.


Although not recommended, a lower input voltage may be used (as low as 38VDC).  However, there are two main limitations when using a lower input voltage:

  • The cable run should be as short as possible and the use of larger gauge cable such as CAT6+ is highly recommended.  On longer cable runs, the voltage drop will be higher due to the higher current needed to meet the needs of the radio.

  • The PoE out is current-limited to .5A.  At 38VDC, this should be sufficient power for a second TNA radio depending on the length of your cable run.


Compatible DC screw block terminal connectors


DC plugs do not ship with the units unless requested, but here are some compatible connectors on Amazon.


Output Power


These TNA models have the ability to send passive PoE out of the 1Gbps port to power another device using the input power provided to the TNA radio.   These settings can be found under the Network/Ethernet PoE Out section of the Web UI.


The output voltage is the same as the input voltage and supports a maximum of .5A of current (24W total).


!   Warning: when using the PoE out feature on these TNA models, care should be taken to ensure there is adequate power supply to power both the TNA radio and the secondary device.   The supplied PoE injector may not be adequate to power both devices and may result in unstable operation.

!   Warning: passive PoE out on the 1Gbps port can damage non-PoE devices.  Do not connect non-PoE devices to the 1Gbps port when PoE out is enabled.

The power output is controlled via a software setting on the TNA radio as shown below: