Passive POE Injector
Passive POE injector with Gas Discharge Tube (GDT) lightning protection and redundant DC inputs. Compatible with Ubiquiti and other passive POE devices. Positive voltage is supplied on pins 4 and 5 and negative on pins 7 and 8. Voltage lines have Metal Oxide Varistor (MOV) on them. Data lines have 60V 1,000 amp GDTs.
Schematic at: http://aprsworld.com/ethernet/POE/poeRedundantPS_rev0.pdf