Multifunction Vehicle Bus Remote I/O Master Module
The EKE-Trainnet® Multifunction Vehicle Bus Remote I/O Master Module (MVR) serves as a gateway between MVB and the modules connected to the EKE I/O bus.
The EKE-Trainnet® MVR module is designed to ensure reliable data transmission on board a train. The EKE-Trainnet® MVR module provides a redundant MVB interface, fully compliant with the IEC 61375-3-1 Train Communication Network (TCN). The purpose of the MVR System is to provide I/O interfaces to remote locations, utilising MVB. The system consists of an MVR module, power module, back plane and I/O modules, such as AIO, AIM, AOM, DIO, DRO, PTI and TSI. The central system, which connects to MVB RIOM, is called the Vehicle Control Unit (VCU). The VCU is a system with at least one CPU module and an MVB module.
Key Features
The configuration of the EKE-Trainnet® MVR is fully automated; it automatically detects the I/O modules and configures itself as an MVB slave, with MVB Port Data interfaces of all connected I/O modules. The MVB module configuration is done through the Gateway CPU, and the MVB reads it through its shared memory at the start-up of the system. For the MVB module, the configuration is read-only, and it is managed by the CPU software. If any changes are made through the debug terminal, the original configuration is retained when the module is reset.
To ensure uninterrupted functionality of the EKE-Trainnet® MVR, the bus is duplicated: there are two lines through which the devices transmit data. If one line is temporarily out of order, the other line can take over and full redundancy is ensured. In this way, the flow of important data can continue without interruption even in the case of potential problems.
The EKE-Trainnet® MVR module has a Medium Attachment Unit (MAU) with an MVB FPGA, which internally supports the EMD (MVR3297B) or ESD (MVR4570B) interface. maintenance messages as well as for Remote Procedure Call type access to the Link Layer primitives. The EKE-Trainnet® WTB module can provide applications with timing synchronisation when a Macro Period finishes.
Options
There are two EKE-Trainnet® MVR module versions available, each with different physical interface options:
- MVR4570B for MVB Electrical Short Distance RIOM, supporting cable lengths up to 20 meters, and
- MVR3297B for MVB Electrical Medium Distance RIOM, supporting cable lengths up to 200 meters.
