Lantronix SESPM1040-541-LT Series, Install Manual, Page: 45 / 64

Lantronix SESPM1040-541-LT-xx Install Guide
33772 Rev. F https://www.lantronix.com/ Page
45
of
64
4. Additional Information
Q & A
Q1 . What are some applications for using the switch?
A1 . The switch comes in three different configurations: An AC-powered PSE, a DC-powered PSE and a PoE-
powered PSE/PD and can be used to connect and provide power to advanced security and surveillance cameras
such as PTZ, dome and high-speed cameras, PoE lighting, digital signage, and building access and control
systems.
Q2
. How much power does the switch provide?
A2 . Up to 90W per port on any individual port; up to 180W total on -AC version and up to 240W total -DC
version. The PD-powered version provides up to 80W total but also includes a 12V auxiliary power port for
powering heaters, fans and other misc. accessory items.
Q3
. If the IEEE 802.3bt spec says a PSE can send up to 90W and a PD can receive 71.3W, why do you say your
SESPM1040-541-LT-PD switch can receive 80W?
A3 . The IEEE802.3bt standard has an Annex Clause 145.3.8.2.1 for input average power exceptions. In closed
systems (e.g., one in which a Lantronix’ SESPM1040-541-LT-AC or –DC version switch is providing power to
Lantronix’ SESPM1040-541-LT-PD switch, this clause allows the -PD to determine resistance and draw power up
to, but not exceeding, the amount the PSE puts out.
Q4 . Does the switch have a fiber port?
A4
. The switch comes with (1) 10/100/1000Base-T RJ-45 or 100/1000Base-X Combo Port. In addition, an
optional second 10/100/1000Base-T RJ-45 or 1000Base-X Combo Port is available.
Q5 . What is the 24V Passive PoE Module?
A5 . The optional 24V Passive PoE Module provides 24VDC power to non-standard PoE powered devices such as
wireless radios, eliminating the need for an additional external power source for those devices.
Q6
. Can all the ports be used at once?
A6 . All ports can be used simultaneously with these exceptions:
• The additional combo port module cannot be used along with the 24V Passive PoE module.
• On the PoE-powered -PD version, the SFP on the included combo port is only available when using a fiber
cable run in parallel with a copper cable to power the unit. See Port Configuration on page 31 .
Q7 . What does the NFC feature do?
A7
. The Near Field Communication antenna located inside the cover of the switch lets you configure the switch
prior to connecting or powering it up simply by holding a smart device with the Switch App over the NFC
antenna and transferring data. It also lets you duplicate the configuration across multiple switches. All of this
saves the customer time and money, as well as simplifying setup and installation of the switch(es).
Q8 . How can you configure the switch without it being powered up?
A8 . When the NFC-enabled device (smartphone or tablet) and the NFC “tag” or antenna on the switch are in
close proximity, a magnetic field is formed and the power from that magnetic field uses modulation to transfer
data. The NFC antenna/tag contains a nonvolatile EEPROM which retains the data transferred from the