Project Description

Non-Isolated Audible Frequency (AF) Track Circuit Device

It is a non-insulated track circuit device designed for AC or DC train section where there is electromagnetic interference (mainly generated from the harmonic wave of the electric line power supply). It detects the presence/absence of the train, does not carry a speed code.

Sub rack (for automatic blocking device)

Sub rack (for automatic blocking device)

Product Information

A device that can be installed in the inside of the Automatic Block System(ABS) of the blocking section.

Online Inquiry


  • Detecting the presence of trains to prevent accidents
  • Achieve safe operation of trains by communicating the train speed and vehicle operation information to the locomotive

Product Composition

Category Unit Quantity Use and Function
Sub rack Set 1 Module (power, transmission, reception, transmission) management
Power Module Unit 1 For supply of power to transmitter and receiver
Sending Module Unit 1 Track detection and carrier transmission
Receiving Module Unit 1 Track detection and carrier reception and operation status monitoring
Transmission Module Unit 1 Display and transfer data
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