TN-5308-4PoE/TN-5308-8PoE Series

EN 50155 8-port unmanaged Ethernet switches with 4/8 PoE ports

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Features and Benefits

  • 4 or 8 IEEE 802.3af compliant PoE and Ethernet combo ports
  • Provides up to 15.4 watts at 48 VDC per PoE port
  • Complies with a portion of EN 50155 specifications
  • -40 to 75°C operating temperature range (T models) 


The ToughNet TN-5308-4/8PoE series M12 unmanaged Ethernet switches are designed for industrial applications in harsh environments. The M12 connectors ensure tight, robust connections,and guarantee reliable operation, even for applications that are subject to high vibration and shock. The TN-5308-4/8PoE series Ethernet switches provide 8 fast Ethernet M12 ports with 4/8 IEEE 802.3af compliant PoE (Power-over-Ethernet) ports. The switches are classified as power source equipment (PSE) and provide up to 15.4 watts of power per port.

The TN-5308-4/8PoE switches can be used to power IEEE 802.3af compliant powered devices (PDs), eliminating the need for additional wiring. The switches support IEEE 802.3/802.3u/802/3x with 10/100M, full/half-duplex, MDI/MDI-X auto-sensing, and provide an economical solution for your industrial Ethernet network. Models with an extended operating temperature range of -40 to 75°C are also available. The TN-5308-4/8PoE switches are compliant with EN50155/50121-4 making them suitable for a variety of industrial applications.

Patent Marking

White Paper: Optimized Ethernet Redundancy for Inter-Consist Networks Download

Network redundancy is a critical factor in ensuring passenger safety and journey reliability in onboard railway communications for both intra-consist and inter-consist Ethernet networks. In addition, railway operators are looking for ways to more efficiently allocate resources and serve passenger demands. For example, metropolitan rail services may want to run trains with fewer consists during off-peak hours but longer trains with more consists during rush hour. Railway operators can also serve multiple markets and conserve track assets by connecting multiple consists with different destinations into one train if they will travel along the same route for at least part of the journey. 

This white paper describes how Dynamic Ring Coupling helps railway operators provide seamless onboard Ethernet redundancy with both rapid recovery times and automatic Ethernet switch configuration even when consists are rearranged mid-journey.


2015 Railway Application Guide Download


Moxa has provided key communications, data control, and computing infrastructure for dozens of successful major railway projects around the world. Metro, mainline, high speed rail, and conventional rolling stock applications on six continents. This brochure examines some key application scenarios and how Moxa addresses today's industrial challenges.

This brochure covers the following applications:

  • Ethernet Train Backbone
  • Onboard CCTV
  • Passenger Wi-Fi
  • Passenger Information System
  • Communication-based Train Control (CBTC)
  • Wayside Communication System
  • Condition Monitoring for Turnouts
Standards IEEE 802.3 for 10BaseT
IEEE 802.3u for 100BaseT(X)
IEEE 802.3x for Flow Control
IEEE 802.3af for Power-over-Ethernet
Processing Type Store and Forward
M12 Ports 10/100BaseT(X) auto negotiation speed, F/H duplex mode and auto MDI/MDI-X connection
Power Requirements
Input Voltage 48 VDC
Operating Voltage 46 to 50 V
Input Current • TN-5308-4PoE: 1.6 A @ 48 VDC
• TN-5308-8PoE: 2.9 A @ 48 VDC
Overload Current Protection 3 A @ 48 VDC
Connection M12 connector
Reverse Polarity Protection 3 A @ 48 VDC
PoE (per port)
Max. Output Power 15.4 W
Output Voltage 44 to 48.5 VDC
Max. Output Current 350 mA
Max. Overload Protection 400 mA
Physical Characteristics
Housing Metal
IP Rating IP40 protection
Dimensions TN-5308-4PoE: 60 x 216.6 x 48.7 mm (2.36 x 8.53 x 1.91 in)
TN-5308-8PoE: 80 x 216.6 x 52.9 mm (3.15 x 8.53 x 2.1 in)
Weight TN-5308-4PoE: 675 g (1.49 lb)
TN-5308-8PoE: 970 g (2.14 lb)
Installation Panel mounting, DIN-rail mounting (with optional kit)
Environmental Limits
Operating Temperature Standard Models: -25 to 60°C (-13 to 140°F)
Wide Temp. Models: -40 to 75°C (-40 to 167°F)
Storage Temperature -40 to 85°C (-40 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Standards and Certifications
Safety UL/cUL 508, EN 60950-1 (LVD)
EMI FCC Part 15 Subpart B Class A, EN 55032 Class A
EMS IEC 61000-4-2 ESD: Contact 6 kV; Air 8 kV
IEC 61000-4-3 RS: 20 V/m (80 MHz to 1 GHz)
IEC 61000-4-4 EFT: Power 2 kV; Signal 2 kV
IEC 61000-4-5 Surge: Power 2 kV; Signal 2 kV
IEC 61000-4-6 CS: 10 V
IEC 61000-4-8
Rail Traffic (for panel mounting installations) EN 50155*, EN 50121-4, EN 45545-2
*Complies with a portion of EN 50155 specifications.
Shock EN 50155, IEC 61373
Freefall IEC 60068-2-32
Vibration EN 50155, IEC 61373
MTBF (mean time between failures)
Time TN-5308-4PoE-48 Series: 252,075 hrs
TN-5308-8PoE-48 Series: 308,392 hrs
Standard Telcordia SR332
Warranty Period 5 years
Details See

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Available Models

  Model No. Description
TN-5308-4PoE-48 Unmanaged Ethernet switch with 4 10/100BaseT(X) ports and 4 PoE ports with M12 connectors, -25 to 60°C operating temperature
TN-5308-4PoE-48-T Unmanaged Ethernet switch with 4 10/100BaseT(X) ports and 4 PoE ports with M12 connectors, -40 to 75°C operating temperature
TN-5308-8PoE-48 Unmanaged Ethernet switch with 8 PoE ports with M12 connectors, -25 to 60°C operating temperature
TN-5308-8PoE-48-T Unmanaged Ethernet switch with 8 PoE ports with M12 connectors, -40 to 75°C operating temperature

Optional Accessories

PoE Splitters & Injectors
  Model No. Description
SPL-24 PoE splitters
INJ-24A Gigabit high power IEEE 802.3af/at PoE+ injectors
INJ-24 Gigabit IEEE 802.3af/at PoE+ injectors
Mounting Kits
  Model No. Description
DK-TN-5308 DIN Rail Mount Kit, 1 pcs of plates (174x60x12.8mm), 3 screws (PMS M3X30mm), 3 screws (PMS M3X4mm)
  Model No. Description
M12A-5P-IP68 Field-installable A-coded screw-in sensor connector, female
M12D-4P-IP68 Field-installable D-coded screw-in sensor connector, male
Wireless Connector Cap
  Model No. Description
A-CAP-M12M-M Metal cap for M12 male connector
A-CAP-M12F-M Metal Cap for M12 Female Connector
DIN Rail Power Supplies
  Model No. Description
DR-75-48 75W/1.6A DIN-Rail 48 VDC power supply with universal 85 to 264 VAC or 120-370 VDC input, -10 to 60°C operating temperature
DR-120-48 120W/2.5A DIN-Rail 48 VDC power supply with universal 88 to 132 VAC or 176 to 264 VAC input by switch, or 248-370 VDC, -10 to 60°C operating temperature
DRP-240-48 240W/5A DIN-Rail 48 VDC power supply with universal 85 to 264 VAC input or 120-370 VDC, -10~70°C operating temperature
Connection Cables
  Model No. Description
CBL-M12D(MM4P)/RJ45-100 IP67 1-meter D-coded M12-to-RJ45 Cat-5C UTP Ethernet cable, 4-pin male M12 connector, IP67-rated
Power Cords
  Model No. Description
CBL-M12(FF5P)/Open-100 IP67 1-meter A-coded M12-to-5-pin power cable, 5-pin female M12 connector, IP67-rated
CBL-M23(FF6P)/Open-BK-100 IP67 M23 Power Cords


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