Train HDLC synchronous communication working mode

HDLC protocol is a common protocol for train communication. In order to reduce the number of signal lines, NRZI coding format is usually used.

The following diagram shows half-duplex HDLC communication based on RS-485 bus for train TCMS system or TMS system:

Some trains will also use RS-422 full-duplex mode, as shown in the following figure:

相关产品

HDLC-UART Isolate Embedded Module

Train Embedded Communication Module
2x RS-485/422 synchronous/asynchronous serial ports with isolation
1x TTL/CMOS synchronous and asynchronous serial port
All serial ports support synchronous HDLC protocol and asynchronous UART.
Realize HDLC, UART conversion each other
+5V power supply, 2.54mm pin interface

MVB-Analyzer Protocol Analyzer

1x MVB interface, optional EMD, ESD media
2x Ethernet ports, and multiple isolated serial or CAN bus interfaces
Monitor and analyze MVB bus, and acquire MVB frames
Support MVB master emulation to assist MVB diagnostic testing
Provide free MVB monitoring and analyzing software
Easy to use, open programming interface

Copyright © 2014-2025 Nanjing Yacer Technology Co.,Ltd.