Ethernet Train Computer (ETC)

Ethernet Train Computer (ETC)

EKE Trainnet® ETC Front EKE Trainnet® ETC Side


EN 50155
EN 45545
IEC 61375-3-4
IEC 61131

Dimensions (W x H x D):
16 TE x 3 U x 160 mm
520 g
Input Power:
5 V DC ± 5 % (1.5 A typ. 3 A max.)
Temperature Range (operational):
-40 °C…+70 °C
MTBF (40 ºC ambient temperature):
690 000 h
Ethernet Interfaces:
10 x 10/100 Mbit/s M12
(1 Gbit/s M12 or SFP as an option for ports 1 and 2)
Serial Interfaces:
1 RS 485 on back for I/Obus connectivity
1 RS 232 on front
(for maintenance, configuration or ESN dongle)
Switching Buffer Memory:
2 Mbits
Management CPU:
PowerPC 667 MHz
Flash Memory:
4 GB
256 MB
VME Bus (EIC821) interface:
A24/D16 Master
module functions

The Trainnet® Ethernet Train Computer (ETC) is a CPU used to manage train computers and sub-systems connected to them. It integrates an Ethernet Switch to build Ethernet Consist Networks (ECN), Ethernet train buses (if fixed train set) or for direct connection to sub-systems. It is ideal to develop cost-effective and efficient Train Communication Networks (TCN) and Train Control and Management System (TCMS) or VCU.

The Trainnet® ETC can be used to develop, store and run applications for the control and diagnostics of on-board systems. It can also implement Gateway functionnalities by providing the necessary interfaces and routing capabilities. It implements the ECN link layer function of the IEC 61375-3-4 Train Communications Network Standard.

The Trainnet® ETC can run the PLC (ISaGRAF®). That means that the ETC can be used to control any train sub-system, from the Passenger Information System (PIS) to air-conditioning. Bus interface modules (e.g. WTB, MVB, CAN) and I/O modules can be easily integrated to and managed by the ETC to extend the capabilities of the train computer.

key features

For train management system application, the ETC has a configurable executor, the ISaGRAF® kernel. Users can also write their own C-tasks as they desire, either as an ISaGRAF® extension or on top of the module’s Linux kernel.

The Trainnet® ETC non-blocking (QoS Layer 2) switching architecture provides large bandwidth: it has 10 Ethernet ports which are 10/100BASE-TX Mbit/s Full Duplex Ethernet with auto MDI/MDIX M12 connectors. If required, two of the Ethernet ports can be replaced by 1 Gbit/s optical fiber SFP ports or M12 X-coded 1 Gbit/s ports for increased bandwidth. An Electronic Serial Number (ESN) port is available for device identification and configuration.

The consist can be equipped with two redundant Trainnet® ETC modules to increase system reliability. The Trainnet® ETC provides connectivity to the consist network switches in a ring configuration (allows redundancy), or by connecting ports directly to the end devices. The switch provides services such as Dynamic Host Configuration Protocol (DHCP) in order to assign IP addresses to end devices automatically. IP addresses are assigned by the connected port to make device replacement easier. The management processor provides also VLAN configurations and Layer 3 switching. It enables diagnostic functions such as the identification of faulty cables.

The 10 ports of the ETC can be partitioned to create distinct ECN subnets using a virtual router. The device supports dynamic routing protocols.The possibility of using link aggregation provides an opportunity to increase data transfer capabilities as well to create redundancies.

Port mirroring can be used to copy packet data seen on a switch port to another port for diagnostic and monitoring purposes. The ETC supports Virtual Router Redundancy Protocol (VRRP) providing enhanced reliability: if a module stops working, its IP address is automatically transferred to a redundant device, ensuring continuous operations.

Published on: 2017-03-02
EKE-Electronics Ltd
Piispanportti 7
02240 Espoo
Tel +358 9 6130 30