The TP-MS4G-VHP from Tycon Systems are 4-Port IEEE 802.3/802.3u/802.3ab-Compliant Power-Over-Ethernet Injectors that are designed to supply power and data to multiple devices via Ethernet from a central location such as an operations room or equipment cabinet. They require an input voltage of 20 - 60 V. These power-over-ethernet (PoE) injectors deliver power and data to midspan devices located at distances of up to 100 m. They support Gigabit Ethernet and also offer backward compatibility with 10/100MB interfaces. These power sources feature Universal Voltage (UniVolt) PoE outputs and all the ports will have the same voltage level. They can accept either a positive or negative voltage on the input, but, the injector is based on a non-isolated design. These PoE injectors are over-current, under-voltage lockout, and short-circuit protected to prevent current spikes or false triggers. They are available in DIN rail-mount packages that measure 90 x 118 x 40 mm and are ideal for wireless access points and security camera applications.