Industrial Gigabit 30W PoE Injector

E-Link LNK-INJ301 PoE Injector Review. I bought this to use in a solar powered location where the temperature regularly goes to over 100F, so I took it apart and tested it. It has a sturdy black anodized aluminum case and stainless-steel hardware. Build quality is excellent. I like the detachable Phoenix / Euro-block 12-48VDC power input connector has captive screws to tie it down. The PCB uses all SMD devices, including the hybrid power transformer array, except for 6 capacitors. The electrolytic capacitors are rated at 63 WVDC, so do not exceed the 48 VDC input rating. The PCB is high grade fully masked fiberglass and is attached to the bottom of the case with a pad that appears to offer some heat sinking to the case for the chip mounted to the bottom of the PCB. PCB layout is excellent - no wire jumpers to correct for bad PCB layout. The rear panel is grounded to the PCB with a jumper and has a labeled ground point. You don't have to open the case to change the mount to go from DIB rail to wall mount. See the attached opened up picture. On a metered bench PS with no PoE load at 24 VDC in, it used 41 mA or just under 1 watt. After 1 day the case did not get warm. I then added a 12 watt PoE load with a Raspberry Pi4b with a case fan and 5V/3A PoE splitter/ regulator to power the Pi. The case was barely warm after 2 days. I used the Pi4b as a load because it is very sensitive to voltage problems and keeps logs of power issues. The logs show no power problems. My bench supply only goes to 30V. I did up the voltage to 30 V to see if the case got warmer, or if the Pi4b complained. No problems and the PoE injector case stayed at 89F in 80F ambient temp. Final torture test was to place the Pi4b, the PoE splitter/regulator and PoE injector in a sealed Pelican case outdoors in full sunlight where the ambient temp reaches 87F without any electronics at noon on most days. I put a Zigbee temperature monitor in the case that I watched on my phone. This simulated my installation conditions where ambient temps will regularly reach 100F in a barn with a 48V solar power. Tested for 3 days. The temp monitor showed 100F peak temps inside the case, and the Pi4b never logged power faults, so test completed and passed. Summary: great product that does indeed qualify for it's industrial rating. The company has a lot of DIN rail mount networking and video items. I like the company too. Easy to reach real engineers for detailed tech questions.

I bought it to power my Hikvision PoE camera by a cat6 cable connection. Elenzk 30W PoE Injector fully meets the needs, it can stable output 48VDC, and the Aluminum shell heat dissipation is better than the iron shell, not getting hot for a long time.

perfect

easy to use. work with 48V PoE Camera.

I ordered two of the 30w PoE+ (802.11af/at) models and have tested both with a variety of 12v and 24v power sources.Neither of the two injectors are able to provide reliable 30w 802.11at power at either 12v or 24v DC input. They will repeatedly drop down to 802.11af mode, resulting in my devices complaining of insufficient power.The injectors appear to work better at 24VDC input than at 12VDC input. This might suggest that they would work even better at 48VDC input, but I do not have a 48VDC power source to test with (and for me it is moot, as my requirement is 24VDC)I am unfortunately going to have to return these.What I did discover is that the big brother to these (the 95w PoE++ model that supports 802.11af/at/bt) will do 30w 802.11at just fine, so if you need 30w 802.11at I would recommend spending the extra $20 for the larger model.

I'm using this to power a Peplink access point in an RV application. The input is from the 12V house power and this injector steps it up to 48V on the PoE side. It is working well and barely gets warm.

Able to send PoE++ quite a distance. Will purchase again.

Unit was defective. This is the second POE unit that was defective.