The TP-DCDC-4848GD-HP DC to DC converters offered by Tycon Power Systems are a high reliability solution for those requiring 48VDC Power Over Ethernet voltage from a +/-48V battery system.
The POE inserters are 802.3af/at compatible.
They have an integrated POE injector to apply the regulated 56VDC to the CAT5 Ethernet cable. The input voltage must be between 36VDC and 72VDC.
They accept data-in to a shielded RJ45 Jack and provide data-out and POE power on the shielded RJ45 output jack.
They work by supplying power on the unused Ethernet pins 4,5(V+) and 7,8(V-).