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:

RELATED PRODUCTS

HDLC-LCM Low Power Communication Module

For air traffic control, train, aerospace, industrial networks
+3.3V power supply, low power consumption embedded communication module
2x Ethernet 100M PHY interfaces
4x serial interfaces, support synchronous HDLC, asynchronous UART
Support NRZ, NRZI, DBPL, Manchester encoding
46.5 x 48 mm miniature size, 2.0mm 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.