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3. Implementation

The R.R.I (Route Relay Interlocking) panel at each station is purely based on Relay Logic. All the data coming from the field such as Signal Aspects (Danger, Caution, Attention, and Clear), Track Circuit (Released, Occupied) and Points (Normal, Reverse) conditions are given directly to the relay room through cables. From the relay room the corresponding indications come on the panel.

These real time data will not be available to us. Hence the idea of simulation comes in. Thus, with the help of a microcontroller four conditions were emulated which depicts all the important aspects of interlocking as well as signalling required for managing trains.

3.1 System Specifications:

For simulating the R.R.I. panel of Mira Road station the following components are required:

IC’S 89C51(Micro Controller) 7218(LED Driver)

7449(7 segment Decoder)

Devices 7805(Voltage Regulator) Bridge Rectifier

Components LED’S Push to on and SPST switches Resistors, Capacitors 7 segment display

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