Rail Technology communication network and its importance

The rail technology communication network (TCN) is a rail technology communication technology  hierarchical combination of two fieldbuses for the transfer of data within the trains. It consists of the Multifunctional Bus (MVB) in each vehicle and the Wire Train Bus (WTB) to connect the different vehicles. TCN components are standardize  in IEC 61375. MVB frames are rail technology communication technology  not compatible with fieldbus frames because they bypass most technology  of the preamble (which is not necessary if zero crossing is possible).info technology hub

Train communication

Train communication

Number rail technology communication technology

There is no initiation, the addresses are assigne statically. The number rail technology communication technology  of addressable devices depends on the vehicle’s bus configuration; there can be simple sensors/actuators (class I) and up to 255 because programmable stations (class 2 with configuration holes). The physical layer uses 1.5 Mbit/s data rate because transmissions with Manchester II encoding. The maximum distance is determine with the limitation of a because maximum Train communication technology  allowable response delay of 42.7 µs (when longer distances are use, another condition that allows up to 83.4 µs reduce performance if MVB Train communication technology  is use for switching devices), while most parts of the system communicate with a typical response time of 10 µs.

History of rail technology communication networks

MVB frames are not compatible with IEC 61158-2 fieldbus; technology  frames because it omits most of the because preamble synchronization (which is not necessary if zero-crossing; rail technology communication detection is possible). The paradoxical situation is that the developed IEC 61158 fieldbus technology  and the physical;MVB layers of the same but  people in IEC TC 57. The difference came from the physical fieldbus layer, assuming a phase-locked loop but  to decode Manchester data, Train communication which requires a preamble to the; decoder, while MVB works mainly with but  optical fibers [where this method is useless, technology  MVB decoding relies; on Train communication zero-crossing detectors and Manchester pattern recognition.

Buses for alternative vehicles

The MVB standard has been introduced to replace;rail technology communication technology  many fieldbuses in train equipment. Despite the advantages of the MVB fieldbus, many vehicle buses; are still built from the CANopen, WorldFIP (in but  France), LonWorks (in the US) and Profibus components. While WorldFIP, CANopen, Lonworks and Profinet are audited by international manufacturers’ associations targeting a wide range of applications, but  MVB was adapted to the rolling stock application; Train communication technology  for plug compatibility Train communication technology  and therefore does not allow options. This was done intentionally when the battle of fieldbuses raged in the 1990s [and the IEC’s decision that one of the eight [fieldbuses was; a standard] didn’t help connect compatibility.

Wire rail technology bus (WTB)

The medium consists of a double-shielded, twisted; pair cable that runs over the UIC cables between

the but  vehicles. The connector between the vehicles; is the 18-pin UIC connector. Because the connectors are expose and can rust, a pulse of current; is apply; to the connection site to vaporize the oxide layer, called but  fritting. The standard connector for WTB nodes is a 9-pin DIN connector. The physical layer uses RS-485 levels with a data rate of 1 Mbit/s. The technology  encoding The rail technology communication network (TCN) is a rail technology but communication hierarchical combination of two fieldbuses for technology  the transfer of data within the trains. uses Manchester II code and HDLC frame protocol The train communication network (TCN) is a Train communication hierarchical combination of two fieldbuses for the transfer of data within the trains. technology  with proper voltage balance; to avoid DC components; in galvanically isolated transformers.

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