Overview

Automatic electronic block system (EABS)

General

Electronic Automatic Block System is an optical communication-based device that automatically controls the signal display according to the progress of trains in the blocked section of the station and station. It is a device to install and operate a number of blocked signal devices so that multiple trains can operate using the blocked section. It is also a device to maximize the safe operation and transportation efficiency of trains by installing CPT/eCPT (train entry prevention device) to provide a fail-safe function and protect track workers on trains that operate the blocked section.

Related Standard

▪ KRTS-CO-Part5-2-2016 (Korean Railway Technical Specifications)

▪ KRS SG 0055-21(R) (Korean Railway Standards)

Configuration

Field Device
  • CPT/eCPT (Commutateur de Protection)
  • Power Unit (Redundant System)
  • Control Unit (Redundant System)
  • Relay Unit
  • Optical Communication Unit (Redundant System)
  • Track Circuit Unit
  • Functional Monitoring Unit
Station Interface Device
  • Power Unit (Redundant System)
  • Control Unit (Redundant System)
  • Optical Communication Unit (Redundant System)
  • Interface Unit (Safety-Relay)
  • Monitoring Device

Specifications

Unit Structure Contents
Mechanical Unit Mechanical Box
Rack		 ▪ Mechanical Box : KRS SG 0024 Applicable Standards STS heat dissipation type special No.1 equivalent or higher
▪ Rack : Installation of Electronic Automatic Block Control System
Power Unit Auto Transfer Switch Controller
Power Supply Circuit		 ▪ Automatically Switches to spare power when commercial power is cut off
▪ Operating Voltage : AC 600V±10% or AC 220V±10%
Control Unit PSU Board
CPU Board
Input Board
Output Board
Safety Relay Board 		▪ CPU : Dual 32-bit higher
▪ RTOS : Safety RTOS
▪ Flash Memory : 10 MB, RAM : 1MB
▪ Ethernet : 10/100 Base-T 2Port
▪ Input Board : DC 24V, 16 Port, Output Board : DC 24V, 16 Port
▪ Safety Relay Board : Safety-Relay 8EA
Relay Unit H/W Relay
S/W Relay 		▪ Nonpolat Line Relay, Current detection Relay(LMR), ATPR Relay, Safety Relay
Optical
Communication Unit		 Network Switch
Rack Mount		 ▪ LAN Port : 8 Port
▪ Number of optical ports (SFP) : 2 Port
▪ Input voltage : DC 24V – 48V
▪ Rated current : 240mA @ DC 24V / 120mA @ DC 48V
▪ Use of certified products : EN 50121-4, EN 61000-6-1, EN 61000-6-2, EN 61000-6-3,
▪ EN 61000-6-4, NEMA TS2
Track Circuit Unit Bias/Impulse/AF ▪ Detected as short circuit in electrical circuit on both rails due to axle when entering train
▪ Configure track circuit system according to customer specifications
Functional
Monitoring Unit		 PSU Board
CPU Board
D/I Board
A/I Board 		▪ CPU : Dual 32-bit higher
▪ RTOS : Safety RTOS
▪ Flash Memory : 10 MB, RAM : 1MB
▪ Ethernet : 10/100 Base-T 2Port
▪ D/I Board : DC 24V, 16 Port, A/I Board : RS 485 2 Port
▪ Easy to expand for the complicated external connection in future for upgrade

System Layout