[Sm4] Poe Technology In Np-Sm4 Switches - NetPing NP-SM4 User Manual

[SM4] PoE Technology in NP-SM4 Switches

A switch Netping NP-SM4 has four ports: P0, P1, P2, P3. Their location and numeration are shown at the picture 6.
Picture 6. Ports Location
A port P3 is designed to feed a power supply to a switch NP-SM4 with the help of PoE-injector or any other PSE
device. A power supply voltage range at a port P3 is 42 – 60V. A compatibility determination sheme works at a port
P3 with PoE devices of af/at standard. Jumper J6 disables a work of PoE determination scheme and decreases a
lower limit of a voltage range to 5 V (more detailed information about J6 is given below).
A switch can be fed with the help of external power supply unit. An input voltage range for a supply unit is 11 – 60 V.
A priority is given to a power supply unit. When a voltage on input of a power supply unit exceeds10 V, PoE input is
disabled.
NP-SM4 switch can transmit power supply received from PoE-injector or a power supply unit on ports P0, P1, P2.
Important! A partner PoE determination scheme doesn't work on ports P0, P1, P2. When jumpers are installed,
power supply is always fed without determining if a partner supports PoE. Power supply is always fed on both pairs
for transmitting data and on unused pairs. (А and В variants of PoE standard). It's impossible to choose either one
of the variants.
By default, NP-SM4 switch does not feed the ports P0, P1, P2. There is a need to install jumpers on a board of a
switch to feed one or several ports. Two jumpers are responsible for each port. A location of jumpers is shown at the
picture 7.
[ENG] NetPing NP-SM4, User guide -[SM4] PoE Technology in NP-SM4 Switches
[SM4] PoE Technology in NP-SM4 Switches
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