PoE application brings many advantages to an installation: 1.Time & cost saving: reduce the time and money without installing electrical power 2.Flexibility: the end device, e.g. IP Camera or wireless access point (AP) can be located everywhere without being tethered to an electrical outlet. 3.Safety: PoE Delivery is designed to protect network equipment from overload, underpowering and incorrect installation. Furthermore, it can be backed-up by UPS to increase the reliability. 4.Smart Power Budget: Compliant with Power Classification , the PSE could allocate power budget for other PDs, whereby a (or more) PD indicates that it complies with power class 2 (max. 6,49 watts) or class 1 (max. 3.84W), but not class 3 (max. 12.95W). Inplementing this scheme, the PSE Device (PoE Switch) couldsupport more PDs (e.g. IP Phones or IP Camera).

1. PoE Power Introduction

2. PoE (Power over Ethernet)
RJ 45 (Delivery Data and Power Together Thru Ethernet cable)

3. PoE - Data/Power Pairs
Power Sourcing
Equipment (PSE)
Power Device (PD)

4. PoE Power Wattage
Property 802.3af (802.3 at Type 1) 802.3 at Type 2
Power available at PD 12.95W 25.50W
Maximum power delivered by
PSE
15.40W 34.20W
Voltage range (at PSE) 44.0-57.0 50.0-57.0
Voltage range (at PD) 37.0-57.0 42.5-57.0
Maximum current 350 mA 600 mA per mode
Maximum cable resistance 20 Ω 12.5 Ω
Power management
Three power class levels negotiated at
initial connection
Four power class levels negotiated at
initial connection or 0.1W steps
negotiated continuously
Derating of maximum cable
ambient operating temperature
None 5℃ with one mode (two pairs) active
Supported cabling Category 3 and Category 5 Category 5
Supported modes Mode A (endspan), Mode B Mode A, Mode B

5. PoE Scenario
 The PSE (Power Source Equipment) is the equipment that provides power to PDs. IEEE 802.3af defines two
types of power source equipment: Endpoint and Mid-span (i.e. PoE Switch).
 A PD (Powered Device) is a device that is either drawing power or requesting power from PSE.
 The specification involves delivering 44~57 volts of DC power over unshielded twisted-pair wiring.

6. Dimension 150.0 x 81.5 x 40.5 mm (L x W x H)
Application Networking / PoE Switch
Specification
220W/250W/280W
Input : 90 - 264 VAC
Features
1. Dual outputs, 12V & 53V
2. Compact Size
3. OCP, OVP, SCP, OTP protection
4. MTBF > 100,000 hours
Single PoE PSU, FLEX 280 Watts

7. Detailed Specifications
FSP280-20FGBBD features with
• 280W PoE Switch Power Supply
• Efficiency 85%
• Flex ATX Form factor, fit all kinds of PoE System
• Built-in Active PFC function (90-264VAC)
• Max. 8A @12Vdc, 4A @53Vdc Output
• Compliant with IEEE 802.3af & IEEE 802.3at PoE standard
• Internal 4 cm 12VDC Fan
• 100% burn-in under high ambient temperature (500C)
• Operation up to 5000 meters Altitude
• Over Current Protection (OCP), Over Voltage protection
(OVP)
• Short circuit protection on all outputs
• MTBF: 100K hours at 25oC
• 100% Hi-pot tested

8. PoE Power Solution
280W PoE Power Supply
FSP280-20FGBBD (12V + 53V)

9. Dimension 185.0 x 73.0 x 39.8 mm (L x W x H)
Application Networking / PoE Switch
Specification
600W/920W
Input : 90 - 264 VAC
Features
1. 54.5V Output
2. Compact Size
3. Phase Shift Full Bridge
4. -10 ~ 55 Degrees Celsius
PoE PSU Module, 600/920 Watts

11. Q1: Why use PoE?
Ans.: PoE application brings many advantages to an installation:
a) Time & cost saving: reduce the time and money without installing electrical power
b) Flexibility: the end device, e.g. IP Camera or wireless access point (AP) can be located everywhere
without being tethered to an electrical outlet.
c) Safety: PoE Delivery is designed to protect network equipment from overload, underpowering
and incorrect installation. Furthermore, it can be backed-up by UPS to increase the reliability.
d) Smart Power Budget: Compliant with Power Classification , the PSE could allocate power budget
for other PDs, whereby a (or more) PD indicates that it complies with power class 2 (max. 6,49
watts) or class 1 (max. 3.84W), but not class 3 (max. 12.95W).
Inplementing this scheme, the PSE Device (PoE Switch) could
support more PDs (e.g. IP Phones or IP Camera).

12. Q2: How is FSP280-20FGBBD used at PoE Scenario?
Ans.: FSP280-20FGBBD can be installed inside Switch as PoE Switch, and can also be installed inside
a Multiport Midspan in between Non PoE Network Switch and End Devices (e.g. IP Camera). For such
Midspan, the ports are designed in a 1 to 1 ratio (coming in port 1 from Switch transferred to port 1
PoE at Midspan)
Q3: What does it mean IEEE802.3af PoE v.s. 802.3at PoE Plus? the
application of PoE Plus (High power PoE)?
Ans.: The 802.3af POE standard is applied for most network devices that require up to 12.95 watts of
electrical power. The 802.3at, or PoE Plus, nearly doubles the electrical power to powered devices,
up to 25.5 watts.
PoE Plus Switches or Injectors can recognize 802.3af powered devices and
enable PoE to them as normal. PoE Plus means a more complete range of
PoE-powered network equipment, e.g. outdoor IP Cameras with external
heater/blower, Pan/Zoom/Tilt surveillance functions or multichannel
wireless access points.

13. Q4: Other than FSP280-20FGBBD, does FSP have any other PoE
products?
Ans.: So far, FSP has released 220W/250W/280W PoE Flex PSU. FSP plans to launch 350W/ 400W/
460W/ 550W PoE PSU at 2016, and will also undertake the development of 550W/650W PoE
Redundant PSU.

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