This is a non-controlled version of our 4 Port PoE injector. It permits injection of a voltage you supply (per port) onto a CAT5 cable for use by radios and other devices which use spare pair PoE - that is, expects power on the unused pins in a CAT5 cable - 4, 5, 7 and 8.
The power is injected by way of a terminal block for each port. Set the polarity of each pin by a jumper near the terminal block. Either positive or negative can be selected.
This unit has no ability to individually power cycle each device. We do have products which provide this functionality as part of our SiteMonitor product line.