White Led – “A” semi automatic signal Orange Led - Path set Red Led –Path occupied Blank – Path neither set nor occupied Marker Blue Led – Points set and locked in reverse position. Red Button - Main signal button Green Button - Shunt signal button (Yellow Button in real panel) Black Button – Route button (Grey Button in real panel) for Aspect Yellow Over Yellow Green Yellow Red
Meaning Attention Clear Caution Danger
The main signal buttons are placed along the signals which can work in both manual as well as automatic mode such as S12 in the up line and S1, S39 in the down line. All these signals are provided with ‘A’ marker and when it is lit indicates that the corresponding signal is working in automatic mode & when the marker is off indicates the signal is working in manual mode. These buttons can only be made functional when the corresponding signal is working in manual mode.