802.3at (30 Watts) Power Over Ethernet Primer

Report
Welcome:
xxx
K U SA
KUSA
1107 SEWillow Place
Blue Springs, Missouri 64014
Telephone: (219) 595 -2631
(816) 988 -7861
FAX: (480) 287 - 8605
EMAIL: [email protected]
KUSA
• Tom West – Sales & Engineering
• Ray Renaud – Director Channel Sales
KUSA Overview
• Kansas City, Missouri
• ECO-Engineering Company
• Veteran Owned Small Business
• Made in USA products
• Energy Conservation
• Focus on IP Industrial Security
KUSA POE Switches with CYBERSECURE Video & 802.3az (Green
Scheduling)
Kyland-USA Power Over
Ethernet
K U SA
Overview
• PoE Technology
• How PoE works
• KUSA PoE
• Products
KUSA Power Over Ethernet
CYBER-SECURE VIDEO
Jumbo Frame & Clean Code Technology
Redundant Trunk Link (RTG) Support
QOS/PRIORITY Classes by Application
HD Camera Ready
802.3az (Green Scheduling)
Power Saving Operations
Industrial Ethernet Switches
Temperature Hardened
5 Year Warranty
Redundant Uplinks
Managed & Unmanaged
All Gigabit Ports
Full 30 Watts on All Ports
What is PoE?
Power over Ethernet allows Ethernet networked user
devices to be powered over the same 4-pair UTP that
provides the network signal
Power is 48 volt DC, up to 25.5 Watts at the Powered
Device (PD) as per the new 802.3at standard
Compatible with all networks, up to Gigabit Ethernet
which uses all four pairs for transmission
PoE (Power Over Ethernet)
Power over Ethernet is a
mechanism for supplying power
to network devices over the
same cabling used to carry
network traffic. PoE allows
devices that require power,
called
Powered
Devices
(PDs),such as IP telephones,
wireless LAN Access Points, and
network cameras to receive
power in addition to data, over
existing infrastructure without
needing to upgrade it. This
feature can simplify network
installation and maintenance by
using the switch as a central
power source for other network
devices.
POE Ethernet Switch is
commonly called: PSE (Power
Sourcing Equipment)
The Advantages of PoE
Some of the advantages of PoE include:
• A single cable between switch and Powered Device (PD)
• No separate power installation/ connection needed for PD's
• Simplified installation and space saving
• Device placement is not limited to nearby power sources
• PD's can be easily moved to wherever there is LAN cabling
• Safety - no mains or primary voltages anywhere
• A UPS can guarantee power to devices even during power
failure
• Devices can be shut down or reset remotely
• Little configuration or management required
PoE Devices
• VoIP phones
• Wireless access points
• Remote Sensors
• Digital clocks
• Webcams
• Security Cameras, including PTZ
• Intercoms
• Building Access systems
• Wimax Radios
• Plus others…
Current PoE
Standards
The PoE IEEE 802.3af IEEE Standard Approved
June 2003.
802.3af Standard Specifes 15.4 Watts (PSE)
with 12.95 Watts (PD), delivered at 100 Meters
The PoE IEEE 802.3at IEEE Standard Approved
2009.
802.3at Standard Specifes 34.2 Watts (PSE)
with 25.50 Watts (PD), delivered at 100 Meters
PoE 802.3 af/at Comparison
Table
Property
802.3af (802.3at Type 1) 802.3at Type 2
Power available at PD
(DELIVERED POWER)
12.95 Watts
25.50 Watts
Maximum power delivered by
PSE (LAUNCH POWER)
15.40 Watts
34.20 Watts
Voltage range (at PSE)
44.0–57.0 Volts DC
50.0–57.0 Volts DC
Voltage range (at PD)
37.0–57.0 Volts DC
42.5–57.0 Volts DC
Maximum Current (Power)
350 mA (milliamps)
600 mA per mode (milliamps)
Maximum Cable Resistance
20 Ω (Category 3) (Ohms)
12.5 Ω (Category 5) (Ohms)
Power Management
Three power class levels negotiated
at initial connection
Four power class levels negotiated at
initial connection or 0.1 W steps
negotiated continuously
De-rating of maximum cable
ambient operating
temperature
None
5°C with one mode (two pairs) active
Supported cabling
Category 3 & Category 5 / 5E
Supported modes
Mode A (endspan), Mode B
(midspan)
/
6
Category 5 / 5E / 6 (Gigabit Rated
Cable)
Mode A, Mode B
How PoE Works?
PoE requires little configuration or management.
The PSE automatically determines whether a
device connected to a port is a powered
device or not, and can determine the power
class of the device.
The PSE can supply up to 25.5 watts of power (at
48 Volts) to the PD device, while at the same
time providing standard Ethernet network
connectivity.
Power Device (PD)
Discovery
The first step for PSE equipment (an Ethernet switch for example) is
to ascertain whether a device plugged into a port is a valid
Powered Device (PD). No power is sent down the cable until a
signature check is completed.
The IEEE 802.3at / af standard for device detection involves applying
a DC voltage between the transmit and receive wire pairs, and
measuring the received current.
A PSE will expect to see approximately 25K Ohm resistance and
150nF capacitance between the pairs for the device to be
considered a valid PD.
A range around these values is specified in the IEEE 802.3ad
standard.
The PSE will check for the presence of PD's on connected ports at
regular intervals, so power is removed when a PD is no longer
connected.
Power ClassificationDiscovery
Once a PD is discovered, a PSE may optionally perform PD
classification by applying a DC voltage and current to the port. If the
PD supports an optional power classification it will then apply a load
to the line to indicate to the PSE the classification the device
requires.
Any unclassified PD is considered to be a class 0 device.
The IEEE 802.3at standard supports delivery of up to 25.50 Watts per
port (at the PD) that may be used to deliver power to PoE devices.
The maximum power consumed by a PD, as specified by the standard,
is 25.50 Watts.
The PSE (POE Switch Port) provides the 'extra' power (up to 34.2 watts)
to compensate for line loss through the copper (resistance). This
factor is calculated on a maximum cable length of 100 Meters
Power Sent Through The
Data Cable
An Ethernet cable (CAT5 / 5E / 6) has four twisted pairs (8wires),
but only two of these are used for data transfer under the
802.3af standard.
The spare pairs are used. In this case the unused pairs are used
to transfer the power.
The data pairs are used. Since Ethernet pairs are transformer
coupled at each end, it is possible to apply DC power to the
centre tap of the isolation transformer without upsetting the
data transfer.
The IEEE 802.3af standard did not allow both sets of wires to be
used, the new 802.3at standard allows their use.
Different vendors PSE equipment may use one or other of the
methods to supply power depending upon the PoE
engineering design.
So the PSE applies power to either the spare wires , data wires or
both.
The PoweredDevice (PD) must be able to accept power from
every option depending upon the class of the device.
The voltage supplied is nominally 48V, and a maximum of 25.50
Watts of power is available at the Powered Device. (PD)
An isolated DC-DC converter transforms the 48V to a lower
voltage more suitable for the electronics in the Powered
Device.
POE POWER LEVELS
Power Levels Available
Class
Usage
Classification
current
[mA]
Power
Range
[Watt]
Class
Description
0
Default
0–4
0.44–12.94
Classification
unimplement
ed
1
Optional
9–12
0.44–3.84
Very Low
power
2
Optional
17–20
3.84–6.49
Low power
3
Optional
26–30
6.49–12.95
Mid power
4
Valid for 802.3at
(Type 2) devices,
not allowed for
802.3af devices
36–44
12.95–25.50
High power
Stages of Powering Up a
PoE Link
Stage
Action
Volts specified
[V]
802.3af
802.3at
Detection
PSE detects if the PD has the correct
signature resistance of 19–26.5 kΩ
Classification
PSE detects resistance indicating
power range
Mark 1
Signals PSE is 802.3at capable. PD
presents a 0.25–4 mA load.
—
7–10
Class 2
PSE outputs classification voltage
again to indicate 802.3at capability
—
14.5–20.5
Mark 2
Signals PSE is 802.3at capable. PD
presents a 0.25–4 mA load.
—
7–10
Startup
Startup voltage
> 42
> 42
Normal
operation
Supply power to device
37–57
42.5–57
(BOTH) 2.7–10.0
(BOTH) 14.5–20.5
PoE vs. Power Supplied
Locally at Device
Reduced cabling costs. Adding power circuits at the point of need can
be a significant expense, This way one cable provides both power
and data. Cameras and access points & sensors can be moved and
wired easily.
Reliability associated centralized supplied power. Circuit outage at a
desk will take out a VOIP set powered locally. Using uninterruptible
power supplies (UPS), Voice over IP (VoIP) telephones can now be
deployed without worrying about them not functioning during a power
outage.
Product Offerings: (POE
Managed)
KY-24PES30WM - 28 Port -30 Watt (802.3at) Managed Power Over Ethernet Gigabit
Switch
24 PSE 10/100/100-BaseT(X) Copper Ports and 4 SFP 1000Base(X) Sockets, CYBERSECURE Video
Automatic – Silicon Based DOS/DDOS Protection, Automatic Camera Restart
AC Power Supply: 110-220 Volts AC / 50-60Hz
(With 802.3az – Green Scheduling)
KY-16PES30WM - 20 Port -30 Watt (802.3at) Managed Power Over Ethernet Gigabit
Switch
16 PSE 10/100/100-BaseT(X) Copper Ports and 4 SFP 1000Base(X) Sockets, CYBERSECURE Video
Automatic – Silicon Based DOS/DDOS Protection, Automatic Camera Restart
AC Power Supply: 110-220 Volts AC / 50-60Hz
(With 802.3az – Green Scheduling)
KY-8PES30WM - 12 Port -30 Watt (802.3at) Managed Power Over Ethernet Gigabit
Switch
8 PSE 10/100/100-BaseT(X) Copper Ports and 4 SFP 1000Base(X) Sockets, CYBER-
Product Offerings: (POE UNManaged)
KY-24PES30WU - 28 Port -30 Watt (802.3at) Managed Power Over Ethernet Gigabit
Switch
24 PSE 10/100/100-BaseT(X) Copper Ports and 4 SFP 1000Base(X) Sockets, CYBERSECURE Video
AC Power Supply: 110-220 Volts AC / 50-60Hz / Rack Mount
KY-16PES30WU - 20 Port -30 Watt (802.3at) Managed Power Over Ethernet Gigabit
Switch
16 PSE 10/100/100-BaseT(X) Copper Ports and 4 SFP 1000Base(X) Sockets, CYBERSECURE Video
AC Power Supply: 110-220 Volts AC / 50-60Hz / Rack Mount
KY-8PES30WU Switch
12 Port -30 Watt (802.3at) Managed Power Over Ethernet Gigabit
8 PSE 10/100/100-BaseT(X) Copper Ports and 4 SFP 1000Base(X) Sockets, CYBERSECURE Video
Requires External 50-57vdc / 300 Watt Power Supply / Din Rail or Rack Mount
KUSA POE Switches with CYBERSECURE Video & 802.3az (Green
Scheduling)
What You Need to Know /1
• There is a Launch and a Receive Power Level
• Power is sent as 48 volts DC (Direct Current)
• Data and Power travel the same wire pairs
• POE works to a maximum length of 100 Meters
• KUSA PoE has CYBER-SECURE VIDEO (CSV)
• KUSA has Managed & Unmanaged PSE switches
• PD‘s must be 802.3at / af compliant
• The CATegory of wire MUST be observed
• Category 3 wire will NOT support Gigabit links
What You Need to Know / 2
• Managed POE Switches have 802.3 Green
Scheduling (Automatic Restart / Keep Alive Check
• Clean Code Technology (Protects from Viruses /
BOTS
• Automatic Protection (in silicon) from Denial of
Service & Distributed Denial of Service Attacks (No
operator Intervention Required
• IP Policing and Port Shutdown based on IP / MAC
Address
• 5 Year Warranty / Temperature Hardened / Fanless
KUSA Engineering & Sales
Support
• Telephone: (219) 595-2631
• Email: [email protected]
• FAX: (480) 287-8605
• Web Site: www.Kyland-USA.com
KUSA is a Veteran Owned Small
Business (VOSB)

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