Power Over Ethernet
Power Over Ethernet (POE)
JEFA Tech offers an assortment of Power Over Ethernet devices which allow remote powering and hardwired network access to devices using a single run of CAT5 cable. Power Over Ethernet (POE) uses the unused pairs in a CAT5 cable to run DC power to the device at the remote end. This offers the benefit of installing a radio right at the antenna which minimizes signal loss that you would normally have over a coaxial cable run.
Using Power over Ethernet to power remote devices has several advantages including:
- The power supply can be centrally located where it can be attached to an uninterruptible power supply.
- Power can be supplied over long distances, up to 300 feet.
- Power can be available wherever network access is available
- The user has the ability to easily power on reset the attached equipment from a remote location.
The injector, which injects voltage on the unused pairs of the CAT5 cable is required in all installations. We offer the POE-48iD which injects 48VDC onto the cable pair. This amount of voltage allows for voltage drop over long cable runs.
"POE Ready" Devices: Check to see if your device is 802.3af compliant and/or check to see if there is a POE mark on the network (RJ-45) connection of the device. If this is the case, then a splitter is built into your unit and you do not need to purchase a separate splitter. Just plug the CAT5 cable coming from the injector directly into the device.
Other Devices: If your device is not 802.3af or POE compliant, then you will need to purchase a splitter that corresponds to the voltage input of your device. This can be found by looking at the power supply that came with your device. For 12V systems, use the POE-12S-AFI. For 5V systems, use the POE-5S-AFI.