POE
Passive vs 802.3af
There are two common methods to remotely power a device. Expensive solutions use the 802.3af standard. Lower cost installations use the passive POE method. 802.3af detects the device attached, and supplies 48v power. However, many devices like the Ubitquiti do not support this method. If you connect a Ubitquiti device to an 802.3af port - nothing happens. Passive POE provides power at all times to the ethernet cable. This module is designed for Passive POE.
Power over Ethernet eliminates remote 110vac transformers
Since 100mb ethernet needs only 2 of the 4 pairs in a CAT-5 cable, 2 pairs are unused. Passive POE uses pins 4/5 for plus power, and 7/8 for ground Many popular devices like Ubitquiti use this method to avoid 110v power at the far end of a ethernet connection - you can go for 328 ft with a 24v supply to a typical Access Point.
Connect the power supply you need (24v for Ubiquiti, 18v for Tranzeo, 12v for OpenMesh) and reduce the mess of cables. Reboot all 8 devices from one central location. We use these in our own installations and are making them available for others. Use with Wiligear, LigoWave, Mikrotik-routerboard, WRAP, ALIX, UBNT and especially UniFi.
Input Voltage |
Device Power |
CAT-5 length ft |
Delivered Voltage |
Power including line loss |
Amps Needed For all 8 |
Example |
24 |
3 W |
328 |
22 |
3.15 W |
1.1 |
Ubitquiti Aircam |
24 |
6 W |
328 |
21 |
6.7 W |
2.3 |
Ubitquiti Unifi |
24 |
8 W |
328 |
20 |
9.34 W |
3.1 |
|
18 |
6 W |
328 |
14 |
7.59 W |
3.4 |
Tranzeo TR-6000 |
12 |
6 W |
120 |
10 |
7.16 W |
4.8 |
Open Mesh 500 |
Note: Guaranty 1 year for module only. No guaranty or liability of any kind for attached devices.
External surge protection required for any situation where lightning or ground loops may occur.
