| poe1a2 |
passive POE adapter |
| Status |
In production |
| Part numbers |
poe1a = POE adapter, not RoHS compliant (flame retardant in enclosure)
poe1a2 = POE adapter, RoHS compliant |
| Use with |
ac18veur
ac18vuk |
| Spec |
Passive POE (Power Over Ethernet) adapter, uses unused pairs of 100baseT network cable to transmit power to remote device. |
| Pinout |
DC jack center positive, 2.1 mm pin. RJ45 pins 4,5 = positive, RJ45 pins 7,8 = negative. |
| Issues |
Passive POE does not comply with the IEEE 802.3af specification.
To minimize cable losses, feed the highest allowed voltage, e.g. 18V. Demarc Technology has a nice POE voltage drop calculator. Keep in mind that WRAP input power is fairly constant over input voltage - when the input voltage drops, the current goes up. Power = voltage * current.
To avoid ground loops, ground should be referenced on the receiving end only, that is use a 2 prong (non grounded) AC adapter. |
| Manufacturer |
PC Engines |
| Origin |
Taiwan |
| Schematics |
PDF |
