
EVALAg5300 Rev 3 - Evaluation Board User Manual
3 Introduction
This manual is intended to be a guide to using the “EVALAG5300 Rev3.0” evaluation
board with a Silvertel Ag5300 Powered Device (PD) module.
4 Board Description
The input data and power is supplied to the board through connector J101. The data is
passed through to the peripheral equipment via J100, with the power from the PD
module supplied via J3 to J5 (see Figure 1 & 4).
The EVALAG5300 on-board bridge rectifiers will ensure that the correct input polarity is
applied to the PD.
4.1 Input Selection and Classification
The EVALAG5300 board will automatically direct the power from J101 to the Ag5300’s
input. LED2 will be illuminated when PoE power is being applied to the board. LK1 can
be removed if you do not want LED2 to illuminate.
If the need for a V-Capacitor filtering arrangement is needed for further noise
reductions, C2 and C3 can be fitted with LK4 present. C2 and C3 values can be 1nF to
22nF and will need to be capable of handling the 1500Vdc impulse test because these
capacitors cross the isolation barrier.
The Ag5300 Classification is fixed at Class 4 and does not need any external
programming components.
When the EVALAG5300 board is connected to an IEEE802.3at (PoE+) compliant PSE
such as a Phihong POE36U-1AT-R; the PSE will detect Class 4 and output 2-Event
classification pulses. In turn the Ag5300 detects these pulses and activates the AT-DET
detect output. This output is connected to an opto-isolator to cross the isolation barrier
and LED 3 will be illuminated.
Note: The EVALAG5300 does not have an on-board PHY or µ-controller; so does not perform the Data
Link Layer (DLL) classification communications back to the PSE (to confirm its power requirement). Many
IEEE802.3at PSEs (such as the Phihong POE36U-1AT-R) do not need this and will automatically supply
full Type 2 power at start-up. But there are several Switches (e.g. Cisco) that will only output Type 1
power level (<15.4W), until they receive DLL confirmation that the PD is Type 2 and supports the higher
power level.