What is PoE?
Power over Ethernet, or PoE, is a standard that has been accepted by the Institute of Electrical and Electronic Engineers (IEEE) that allows for both power and data to be run using an Ethernet cable such as CAT5 or CAT6. Typically, most networks only send/receive data through two pairs of wires even though CAT5 cables have four pairs.
How is it powered?
What PoE does is use one of the unused pairs to power a variety of devices. Typically, PoE has a 48 volt DC input to its devices for power. These devices are usually powered in one of two ways:
1) PoE Injector – A PoE injector essentially can turn a typical RJ45 data jack into a PoE port. The injector is plugged into a 110VAC power outlet and there are two RJ45 jacks on the other side – both an input and an output. An ethernet cable would go from the data jack into the input and another Ethernet cable would go from the output of the injector to the PoE-enabled device for powering.
2) PoE Switch – This is the more conventional option, especially when utilizing a lot of clocks or other PoE devices in your facility. The PoE switch only needs to be plugged into 110VAC and is typically mounted in a rack in the server room. These switches can have as many as 48 ports and send out PoE on all of the ports. This is a much more efficient and cleaner option when using multiple PoE devices.
Why Use PoE Clocks?
A PoE clock is very sophisticated and extremely accurate. Each Sapling IP clock receives time via NTP and has a built-in web interface for simple programming. Each clock has advanced features such as customizable Daylight Saving Time, 12/24 hour mode (digital displays only), brightness scheduling (digital displays only), time zone offsetting, e-mail alerts, server redundancy and more!
Our PoE clocks can also be controlled via an IP Monitor for system-wide changes and supervision.