Silvertel Ag5700LPB 24W Surface Mount Poe+ Module Evaluation Board User Manual
- June 12, 2024
- Silvertel
Table of Contents
V1.0 May 2023
Evaluation Board User Manual
EvalAg5700
Evaluation Board
User Manual
Version 1.0 – May 2023
Kit Contents
➢ EvalAg5700 Evaluation Board
➢ Ag57xxLPB Module Soldered to Evaluation Board
Board Layout
2.1 Link Settings
LK1 – Input Power LED Enable
LK2 – Output voltage Adjust
LK3 – Output Power LED Enable
LK4 – Type 2 Detect LED Enable
2.2 Input Output Connections
J1 & J2 – Load Output Binding Posts
J101 – PoE Enabled RJ45
J100 – Data Passthrough RJ45
Introduction
This Manual is a guide to using the EvalAg5700 evaluation board fitted with a
Silvertel Ag5712LPB or Ag5724LPB miniaturised Class 4 surface mount power over
ethernet module.
This board has been designed to assist with evaluating the use of Silvertel’s
module in an application; as such it has been designed to pass through
Ethernet data signals (10/100/1000BASE-T) from the Midspan PSE (Power Sourcing
Equipment) or PoE enabled switch connected to J101, onto the system connected
to J100.
While this evaluation board has been designed following Silvertel’s
recommendations, it should not be considered as a reference design as it
features circuity included solely for the purposes of evaluation that are not
be required for proper operation.
Input
The EvalAg5700 board will extract the power from the data pairsets using the
RJ45 connector with integrated magnetics, J101. The data is passively passed
on to any peripheral equipment via J100, while the power is provided to the
Ag5700LPB module in the correct polarity via the bridge rectifiers BR1 and
BR2.
4.1 Operation
To ensure that the PSE does not apply power to a non-PoE enabled device the
output port first checks for a valid PoE signature. If the PSE does not see a
valid signature, then it will disconnect, wait approximately 2 seconds then
try again.
Once a valid signature has been detected the PSE may then perform
classification to determine the power requirement of the PD, only after this
has occurred will the PSE supply power to the powered device.
The module will provide the 25K signature followed by a class 4 power level
request to be powered by an IEEE compliant PSE.
If PSE is not capable of suppling the Class four power level requested by the
Ag5700LPB, if using an IEEE802.3af PSE for example, it should supply the
highest power level it is capable of supplying.
4.2 Input Power LED
LED1 illuminates when the module is being supplied with greater than 36V. This
can be disabled by removing the jumper link LK1, removing this link does not
affect the power being delivered to the Ag5700LPB.
4.3 PSE Detect
When the Ag5700LPB module fitted has detected it is being powered by an
IEEE802.3 type 2 or greater PSE, the ‘TYP2-DET’ pin will be pulled low, and
this will cause LED3 to become illuminated on the EvalAg5700 board.
Output
The Ag5700LPB output voltage will be present on the two binding post
terminations J1 and J2. These can be connected to with 4mm Banana connectors,
bare wire, or fork connectors.
5.1 Output Power LED
LED2 illuminates when the module is outputting. This can be disabled by
removing the jumper link LK3, removing this link does not affect the power
being supplied by the Ag5700LPB.
5.2 Output Voltage Adjust
The output voltage of the Ag5700LPB module can be adjusted by changing the
location of the jumper LK2. The EvalAg5700 is fitted with two adjust
resistors. The down adjust resistor R5, is fitted with a 68kΩ resistor. And
the up adjust resistor R6, which is fitted with
a 0Ω resistor to allow for the maximum adjust change of the Ag5700LPB module.
To increase the output voltage, insert the jumper to LK2 in the left position,
so that the link is between the middle and leftmost pin.
To reduce the output voltage, insert a jumper to LK2 in the right position, so
that the link is between the middle and rightmost pin.
If the output voltage needs to be set to a different value (within the
adjustment range) then connect different value resistors in place of R5 (68K)
or R6 (0Ω) and connect the jumper into the corresponding link setting.
Note: ensure that the down adjust resistor is not shorted when connecting
a module that has a higher stated resistance in the datasheet, as this could
cause damage to the module.
5.1 Data Output
Any data that is provided over the PI (Ethernet cable) connected to the Data &
Power port, J100 will be transposed onto the Data output port, J101 via the
data transformer.
The data traces on the evaluation board have been designed to pass through
10/100/1000BASE-T Ethernet data signals. No processing or amplification of
this signal will be performed on the evaluation board.
EMI
The EvalAg5700 contains the recommended components for EMI filtering, see ANX-
POEEMI for more details.
The board is fitted with ferrite beads, L1-6; if these are not required, they
can be effectively removed from the circuit by fitting R108 and R109 with 0Ω
resistors.
Test Setup
Figure 2 shows the basic set up using the EvalAg5700 evaluation board powered
by Silvertel’s EvalAg6120 PSE.
The equipment required: –
➢ EvalAg5700 fitted with Silvertel’s Ag5712LPB or Ag5724LPB PD Module.
➢ EvalAg6120 or other IEEE802.3 compliant PSE
➢ Power supply unit, +50-57V output e.g. 60V bench power supply
➢ CAT5e or greater cables
➢ Application Circuit
Optional equipment: –
Data source e.g. PC
Additional information
Full operating conditions and feature set can be found in the Ag5700 product datasheet, available from www.silvertel.com.
Schematic
Figure 3: Schematic
Bill of Materials
Layer Routing
© Silver Telecom 2023
References
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