PEM3100 SERIES

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30W Power Over Ethernet Plus (POE+) PD Module

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PEM3100_13F_R1-1

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If the remote shut down feature is not used, connect RSD to Vin-.

Table 2: Remote Shut Down

Description

Unit

Min

Typ

Max

RSD pin threshold low

uA

20

RSD pin threshold high

uA

100

Input voltage RSD pin

V

6

Figure 5 – Remote Shut Down Connection

RSD

+VDC

-VDC

CPR

VIN-

To Host Board Controller

470uF

C1

C2

470uF

R1

Isolation

U1

LTV357 or PC817 or equivalent

PEM3100

Figure 5

If RSD is asserted, the ATDET pin is forced high, irrespective of the PD mode. Please see Table 3 below

for ATDET output definitions under various powering modes.

Table 3: ATDET Truth Table

ATDET signal status

PSE

Type 1

Type 2

RSD = Low

Low

High

RSD = High

High

High

Part F.7. – Isolation

IEEE 802.3af / at section 33.4.1 calls for a Powered Device (PD) to meet safety isolation requirement by

meeting the electrical strength test of IEC 60950 sub clause 6.2. Infomart’s® PoweredEthernet™ PEM3100

modules meet or exceed 1500V impulse test. This is also referred to as ‘Hi Pot Test’, ‘Flash Tested’,

‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’.

Part F.8. – Output Voltage Adjustment

The PEM3000 series has an OADJ pin, which allows the output voltage to be increased or decreased from

its nominal value using a 1/16W power rating or greater and 1% tolerance resistor. The resistor to be

connected between the OADJ pin and either the +VDC or –VDC pin as per figure 6~8 below. Only one

connection i.e. between OADJ and +VDC or between OADJ and –VDC is permitted at a time. A

change of more than ± 10% or ± 1.5V whichever is lower, from nominal voltage is not permitted. (PEM3124