LAN PRO-FIL 100Mbit protection manual

This is a small protection and filter board for 100 Mbit LAN and passive PoE. The board includes high voltage protection, isolation and filter transformers with low voltage protection. The PoE circuit can be pass-through (LAN-LAN), injector or splitter. PoE also includes surge protection and a set of differential and common mode filters. This board can be mounted on a DIN rail and secured using the brackets supplied.

Jump to

Block diagram
Product details


- LAN 100Mbit HV protection board
- RFI LAN + PoE filter
- PoE injector/splitter
- PoE protection

- Surge arrester

lan pro-fil protection board by qro.cz hamparts.shop

lan pro-fil protection board location construction by qro.cz hamparts.shop


100Mbit Full duplex
RJ45 LAN connectors
LAN isolation + HV protection
PoE DC max. 60V 1A
PoE passive at wires 4, 5, 7, 8
4+5 = + DC; 7+8 = - DC
PoE standard 802.3af
HV protection 75V GDT
Differential and common-mode filters
PoE pass IN - OUT
PoE injector/splitter
DIN rail holders included
PCB size 50x65 mm

NOTE: For proper operation of the protectors, the grounding screw (GROUND ME!) must be connected to a quality grounding point. The connection must be made with the shortest and thickest wire as possible.

Block diagram

block diagram lan pro-fil protection board qro.cz hamparts.shop


The passive PoE circuit can operate with DC voltage up to 60V and current up to 1A. The voltage is applied to pins 4, 5, 7, 8. Where pins 4+5 = + DC, 7+8= - DC.

The board can be used as:
- PoE injector: Voltage is applied to the LAN cable and powers the device at the end - for example, a WiFi link. Blue socket to OUTDOOR
- PoE splitter: Voltage is separated from the LAN cable to power an external device. OUTDOOR to blue socket.
- PoE pass through: Voltage goes through both LAN connectors and is also brought out to the blue terminal block. The connection between the LAN connectors is through protectors and filters. Please check your Jumper settings. These take care of the voltage connection to/from the INDOOR connector - for PoE pass through.

PoE injector

poe injector lan pro-fil protection qro.cz hamparts.shop

PoE splitter

poe splitter lan pro-fil protection board qro.cz hamparts.shop

PoE pass through

poe pass through lan pro-fil protection board qro.cz hamparts.shop

Product details

Included in package

LAN PRO-FIL board assembled and tested
DIN radil holders 2 pieces - image

PCB size (mm) 50x65
Weight brutto (kg) 0.09 kg


Ing. Jan Šustr
ID 05476356, VAT CZ8407024780
Palachova 1777/7, 591 01 Žďár nad Sázavou, Czech republic, Europe

General instructions:

Please also read general instructions before handling the product.

European Union Declaration of Conformity

Manufacturer Ing. Jan Šustr (QRO.cz):

ID 05476356, VAT CZ8407024780
Palachova 1777/7, 591 01 Žďár nad Sázavou, Czech republic, Europe

declares that the assembled product:


is compatible with the relevant Union harmonisation legislation directives:
EMC Directive 2014/30/EU
ČSN EN 61000-6-3 ed. 2
ČSN EN 61000-6-1 ed. 2 (333432)

On behalf of Ing. Jan Šustr (QRO.cz)
Ing. Jan Šustr, CEO
10th May 2024

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