Gigabit Ethernet Integrated Train Backbone Node 

Train Backbone Node


GbE Integrated Train Backbone Node

  • Train Backbone Node / Consist Switch combination
  • Compliant with IEC 61375 standard
  • Compliant with EN 50155 standard
  • Compliant with EN 45545 standard
  • Extended temperature range -40 °C ÷ +85 °C available
  • TRDP interface protocol for end devices

Backbone side

  • 4x GbE switched ports for ETB implementation
  • 2x Device hardware bypasses
  • R-NAT (Railway 1:1 NAT)
  • Router Redundancy Protocol
  • Dynamic routing following train inauguration
  • Train-wide standard multicast routing
  • TTDP protocol
  • Full communication profile

Consist side

  • 2x GbE switched ports for ECN implementation
  • 8x FE switched ports for ECN implementation
  • PoE+ capability
  • 60 W PoE+ budget available
  • 1x Device hardware bypass

The Gigabit Ethernet Integrated Train Backbone Node (ETBN) is used when two or more trains’ networks need to be connected together. The Integrated Train Backbone Node has been specially designed to meet the requirements specified by IEC 61375 for the Ethernet Train Backbone (ETB) network.

The Integrated ETBN is a perfect combination of an IEC 61375 standard Train Backbone Node implementation with a multi-port Ethernet Consist Switch. Due to this mix of backbone and consist ports, it provides an integrated and cost sensitive solution.

Double switched backbone lines protected by a bypass relay ensure high levels of fault tolerance also in the case of a power failure. One or more Integrated ETBNs can be used together with an active/passive redundant configuration to obtain the maximum level of protection.

Designed to operate in harsh environmental conditions typical of Rolling-Stock applications and fully EN 50155 compliant, the Integrated Train Backbone Node provides the highest level of reliability and robustness required by the railway industry.

The TTCMP provides automatic device configuration and continuous monitoring giving the customer a way to reduce commissioning and maintenance costs.

Wide range of models available

The Integrated Train Backbone Node has four (4) 1000BASE-T switched ports for Train Backbone Network implementation, two (2) 1000BASE-T switched ports and eight (8) 100BASE-TX switched ports for the Consist Network implementation.

Eight (8) Fast Ethernet Consist ports can be optionally equipped with PoE+ capability.

IEC 61375 compliance

IEC 61375 Train inauguration procedure is fully supported as well as ETBN control interface for TRDP devices. Routing and address translation rules for multiple consist networks interconnections are automatically defined during train inauguration. Other interfaces (SNMP, REST) are also available in order to provide a wider range of potential implementations.

Main technical specifications

  • IEEE 802.3 Standard Physical layer: 10BASE-T, 100BASE-TX, 1000BASE-T
  • IPv4 protocol supported (IPv6 protocol ready)
  • Spanning tree (STP 802.1D) and Rapid Spanning Tree (RSTP 802.1w)
  • Link aggregation protocol (LACP 802.3ad)
  • Up to 4096 802.1Q VLANs
  • DHCP option 82 handling
  • IGMP versions 1, 2 and 3 snooping
  • SNMP v1, v2c, v3 device management
  • Static IPv4 unicast and multicast routing
  • OSPF and RIP dynamic routing protocols
  • Network Address Translation (SNAT, DNAT and R-NAT)
  • Packets filtering 
  • Router Redundancy Protocol
  • Dynamic routing following train inauguration
  • Train-wide standard multicast routing  

Physical data

  • Connector type: M12
  • Power supply: 24 Vdc ÷ 110 Vdc
  • Interruption voltage supply class: S2, according to EN 50155
  • Power consumption: 22 W max (PoE excluded)
  • PoE+ budget: 60 W
  • Overall dimensions: 207 x 184 x 51 mm (noPoE version), 207 x 184 x 73 mm (PoE version)
  • Weight: 2 Kg (noPoE version), 2.6 Kg (PoE version)
  • Operating temperature: -25 °C ÷ +70 °C (+85°C for 10 min. according to EN 50155 class OT3 with extended operating temperature ST1) or -40 °C ÷ +70 °C (+85°C for 10 min. according to EN 50155 class OT4 with extended operating temperature ST1)
  • Storage temperature: -40 °C ÷ +85 °C
  • Degree of protection: IP40, IP54, IP65

Main approvals/compliance

  • EN 50155: Railway Applications (Electronic equipment used on rolling stock)
  • IEC 61375: Electronic railway equipment - Train communication network (TCN)
  • EN 61373: Shock & Vibration
  • EN 45545: Fire & Smoke
  • IEEE 802.3: Ethernet Network Standard
  • REACH Regulation and Waste Framework Directive (WFD)
  • RoHS Directive