TN-4500A Series

Features and Benefits

  • Up to 4 Gigabit ports with PoE function
  • Isolated power with 24 to 110 VDC power supply range
  • 2 Gigabit fiber ports with embedded multi-mode Q-ODC® interface on fiber models
  • 2 Gigabit ports with bypass relay function on bypass models
  • Complies with all EN 50155 mandatory test items
  • -40 to 75°C operating temperature range
  • Turbo Ring and Turbo Chain (recovery time < 20 ms @ 250 switches), and STP/RSTP/MSTP for network redundancy
  • Up to 20 IEEE 802.3at/af compliant combo PoE and Ethernet ports
  • Provides up to 30 W per PoE port


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The ToughNet TN-4500A Series M12 managed Ethernet switches are designed for railway applications, including rolling stock and wayside installations. The switches use M12 and other circular connectors to ensure tight, robust connections, and guarantee reliable operation in industrial environments where vibration and shock are commonplace. The TN-4500A Series Ethernet switches provide 12 or 24 fast Ethernet M12 ports with or without IEEE 802.3at/af compliant PoE functionality, and the Gigabit models have 4 Gigabit Ethernet interfaces with PoE and optional bypass relay functionality. In addition, the fiber models provide 2 Gigabit fiber interface ports with an embedded 2 km multimode fiber transceiver. The PoE switches are classified as power source equipment (PSE).

The switches provide up to 30 watts of power per port, and can be used to power IEEE 802.3at/af compliant powered devices (PDs), such as IP cameras, wireless access points, and IP phones. The 24 to 110 VDC wide power input range and isolated dual power inputs not only allow you to use the same type of power source at different sites around the globe, but also increase the reliability of your communications system. Furthermore, the -40 to 75°C operating temperature range of the switches ensures they can withstand deployment in harsh environments. TN-4500A Series Ethernet switches are compliant with the mandatory sections of EN 50155, covering operating temperature, power input voltage, surge, ESD, and vibration, as well as conformal coating and power insulation, making the switches suitable for a variety of industrial applications.

Additional Features and Benefits

  • Provides up to 30 watts per PoE port with a total power budget of 120 watts per switch

  • IPv6 Ready logo awarded (IPv6 Logo Committee certified)

  • Switches are compliant with the mandatory test items of the EN 50155 standard to ensure suitability for rolling stock applications

  • DHCP Option 82 for IP address assignment with different policies

  • Turbo Ring and Turbo Chain (recovery time < 20 ms @ 250 switches), and STP/RSTP/MSTP for network redundancy

  • IGMP snooping and GMRP for filtering multicast traffic

  • EtherNet/IP and Modbus TCP industrial Ethernet protocols supported

  • Port-based VLAN, IEEE 802.1Q VLAN, and GVRP to ease network planning

  • QoS (IEEE 802.1p/1Q and ToS/DiffServ) allows real-time traffic classification and prioritization

  • IEEE 802.3ad, LACP for optimum bandwidth utilization

  • SNMPv1/v2c/v3 for different levels of network management

  • TACACS+, SNMPv3, IEEE 802.1X, HTTPS, and SSH to enhance network security

  • RMON for proactive and efficient network monitoring

  • Bandwidth management to prevent unpredictable network status

  • Lock port allows access by only authorized MAC addresses

  • Port mirroring for online debugging

  • Automatic warning by exception through email and relay output

  • Line-swap fast recovery

  • LLDP for automatic topology discovery in network management software

  • Configurable by web browser, Telnet/serial console, CLI, and Windows utility

  • Loop protection to prevent network loops

  • Panel mounting installation capability


Input/Output Interface
Alarm Contact Channels 2 x relay output in one M12 A-coded 5-pin male connector with current carrying capacity of 1 A @ 30 VDC
Ethernet Interface
10/100/1000BaseT(X) Ports (M12 A-coded 8-pin female connector) TN-4516A-4GTX-WV-T: 4
TN-4516A-4GTX-WV-CT-T: 4
10/100BaseT(X) Ports (M12 D-coded 4-pin female connector) TN-4516A Series non-PoE models: 12
TN-4524A/4528A Series: 8
PoE Ports (10/100BaseT(X), M12 D-coded 4-pin female connector) TN-4516A Series PoE models: 12
TN-4524A/4528A Series: 16
PoE Ports (10/100/1000BaseT(X), M12 A-coded 8-pin female connector) TN-4500A Series PoE models: 4
TN-4500A Series PoE models with Fiber or Bypass: 2
10/100/1000BaseT(X) Ports (M12 X-coded 8-pin female connector with bypass relay) TN-4516 A-4GTXBP Series: 4
TN-4516A-12PoE-2GPoE-2GTXBP Series: 2
TN-4528A-16PoE-2GPoE-2GTXBP Series: 2
10/100/1000BaseT(X) Ports, Q-ODC Fiber Connector TN-4516A-12PoE-2GPoE-2GODC Series: 2
TN-4528A-16PoE-2GPoE-2GODC Series: 2
Standards IEEE 802.1D-2004 for Spanning Tree Protocol
IEEE 802.1p for Class of Service
IEEE 802.1Q for VLAN Tagging
IEEE 802.1s for Multiple Spanning Tree Protocol
IEEE 802.1w for Rapid Spanning Tree Protocol
IEEE 802.1X for authentication
IEEE 802.3 for 10BaseT
IEEE 802.3ab for 1000BaseT(X)
IEEE 802.3ad for Port Trunk with LACP
IEEE 802.3af/at for PoE/PoE+ 0utput: TN-4500A Series PoE models
IEEE 802.3u for 100BaseT(X) and 100BaseFX
IEEE 802.3x for flow control
IEEE 802.3z for 1000BaseSX/LX/LHX/ZX
Ethernet Software Features
Broadcast Forwarding IP directed broadcast, broadcast forwarding
Configuration Options Command Line Interface (CLI), Command Line Interface (CLI) through Serial/Telnet/SSH, Web Console (HTTP/HTTPS), Windows Utility
Filter 802.1Q, GMRP, GVRP, IGMP v1/v2/v3, Port-based VLAN, Static Multicast
Industrial Protocols EtherNet/IP Adapter (Slave), Modbus TCP Server (Slave)
Management Back Pressure Flow Control, DHCP Option 66/67/82, DHCP Server/Client, Flow control, HTTP, IPv4/IPv6, LLDP, Port Mirror, QoS/CoS/ToS, RARP, RMON, SMTP, SNMP Inform, SNMP Trap, Syslog, Telnet, Account Management
MIB Bridge MIB, Ethernet-like MIB, MIB-II, P-BRIDGE MIB, Q-BRIDGE MIB, RMON MIB Groups 1, 2, 3, 9, RSTP MIB
Redundancy Protocols Link Aggregation, MSTP, RSTP, STP, Turbo Chain, Turbo Ring v1/v2, Turbo Ring with DRC
Security Broadcast storm protection, HTTPS/SSL, Local Account Accessibility, TACACS+, Port Lock, RADIUS, Rate Limit, SSH
Time Management IEEE 1588 PTP v1/v2, NTP Server/Client, SNTP
Switch Properties
IGMP Groups 256
Max. No. of VLANs 64
VLAN ID Range VID 1 to 4094
LED Interface
LED Indicators STATE, PWR1, PWR2, FAULT, 10/100/1000M
Serial Interface
Console Port M12 A-coded male connector
Power Parameters
Input Current TN-4516A Series non-PoE models: Max. 0.7 A @ 24 VDC
TN-4516A Series PoE models: Max. 7.0 A @ 24 VDC
TN-4524A Series: Max. 6.5 A @ 24 VDC
TN-4528A Series: Max. 7.2 A @ 24 VDC
Input Voltage 24/36/48/72/96/110 VDC
No. of Power Inputs 2
Operating Voltage 16.8 to 137.5 VDC
Overload Current Protection Supported
Power Connector M23 connector
Reverse Polarity Protection Supported
Total PoE Power Budget TN-4500A Series PoE models: 120 W
Physical Characteristics
Housing Metal
IP Rating IP42
Dimensions TN-4516A Series: 229.8 x 132 x 122.3 mm (9.05 x 5.20 x 4.81 in)
TN-4524A/4528A Series: 347.8 x 132 x 122.3 mm (13.70 x 5.20 x 4.81 in)
Weight TN-4516A Series non-PoE models: 1,965 g (4.32 lb)
TN-4516A Series PoE models: 2,607 g (5.74 lb)
TN-4516A Series Fiber models: 2,705 g (5.96 lb)
TN-4524A Series: 3,063 g (6.74 lb)
TN-4528A Series: 3,304 g (7.27 lb)
TN-4528A Series Fiber models: 3,375 g (7.44 lb)
Installation DIN-rail mounting (optional), Wall mounting
Protection TN-4500A Series -CT models: PCB Conformal Coating
Environmental Limits
Operating Temperature -40 to 75°C (-40 to 167°F)
Storage Temperature (package included) -40 to 85°C (-40 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Altitude 2000 m
Standards and Certifications
EMC EN 55032/24
EMS IEC 61000-4-2 ESD: Contact: 6 kV; Air: 8 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 20 V/m
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 PFMF
Freefall IEC 60068-2-31
Radio Frequency FCC
Railway EN 50121-4, EN 50155, IEC 60571
Railway Fire Protection EN 45545-2
Safety IEC 60950-1, UL 61010-2-201
Shock IEC 60068-2-27, IEC 61373, EN 50155
Vibration IEC 60068-2-64, IEC 61373, EN 50155
Green Product RoHS, CRoHS, WEEE
Standards Telcordia SR332
Time TN-4516A-4GTX Series: 599,164 hrs
TN-4516A-4GTXBP Series: 589,421 hrs
TN-4516A-12PoE-4GPoE Series: 428,680 hrs
TN-4516A-12PoE-2GPoE-2GTXBP Series: 427,322 hrs
TN-4516A-12PoE-2GPoE-2GODC Series: 421,432 hrs
TN-4524A-16PoE Series: 429,402 hrs
TN-4528A-16PoE-4GPoE Series: 393,894 hrs
TN-4528A-16PoE-2GPoE-2GTXBP Series: 392,746 hrs
TN-4528A-16PoE-2GPoE-2GODC Series: 387,767 hrs
Warranty Period 5 years
Details See