Power over Ethernet (PoE) Serial Device Servers

1st Tuesday, 2012  |  Life at LAVA  |  no comments

Our popular one- and two-port serial device servers — the Ether-Serial Link 1-232-DB9, the 2-232-DB9, the 1-232-RJ45, and the 2-232-RJ45 — have now been spun into PoE (Power over Ethernet) versions. Because these device servers are designed to draw their power from the same Ethernet cable that is used for their Ethernet interface, there is no need for AC (mains) power. Deployment is greatly simplified, and unnecessary power adapters (“wall warts”) can be eliminated. These four devices are compatible with IEEE 802.3af-2003 at 3 Watts, Mode A operation.

Power over Ethernet serial device servers

LAVA PoE Ether-Serial Links

For these PoE Ether-Serial Links to operate, they will need to be attached to a network supplying power over Ethernet, and that’s about it. That power is added to the Ethernet by either a “PoE  endspan” or a “PoE midspan” — switches or other devices designed to inject the appropriate power into the network cabling. The cabling used is standard network cabling (assuming it has the usual complement of wires),  and no additional software is required to make a working PoE system.

These PoE serial device servers also come with a connector that can be used to supply conventional power through an AC to DC wall adapter, supplied separately.

PoE ESL Ethernet end cap

PoE ESL Ethernet end cap

Details on Power over Ethernet endspans, midspans, cabling, signal, and standards can be found here.

A PDF specification sheet for the PoE ESLs can be found here.