Page 490 - IRSEM_Main Book

(iv) Signal indication for 'OFF' aspect of a shunt signal shall be given by
a slanting white light strip or two miniature slanting white lights. Such
indication of a shunt signal located on the same post as a running
signal, shall be given below the running signal indication.

(v) A white light for 'A'/'AG' marker indication should be lit up on the control
panel below the symbol of the signal when set for automatic working.

(vi) Indication that "Calling on" signal is 'OFF' shall be given by a white light
below the running signal indication of corresponding signal symbol.

(vii) Starter Indicator`s indication shall be provided by a white strip light
which should be lit when repeater of the signal has displayed 'OFF'
aspect. This indication should be provided by a white strip over the
running signal symbol on the control panel.

(d) Track Circuit Indications
(i) Indication that the track circuit is occupied shall be given by a row of
red lights (not less than two) on the each track circuit portion.

(ii) When the track is not occupied, the red lights shall be extinguished.

(e) Power Supply Indications

(i) An indication to indicate the availability of the supply from the
Mains/Diesel Generator/Catenary 1 or 2 should be suitably indicated, if
such indications are not provided in Change over Panel in SM room.

(f) Other Indications

(i) Approach track circuits shall be indicated on illuminated diagram. In
continuous track circuit territory, the approach track circuits will cover
all the track circuits in rear of the first stop signal up to the next
signal in rear or up to the track circuit specified in the Control Table
for approach locking. An approach track circuit controlling calling on
signal shall be indicated separately with a distinct mark.

(ii) Advance approach warning of trains if required shall be indicated on the
control panel in the form of flashing lights or other type of indication and
audible bell warning to attract attention of Station Master. These visual
and audible warnings shall stop as soon as the approach track circuits
are occupied or signals are taken 'OFF' for the train. It shall be possible
to silence the audible warning by pressing a push button. This
cancellation shall not apply to train approaching subsequently for which
the push button must be pressed again.

(iii) Signal Lamp Failure alarm:Failure of lighting of a signal aspect/route
aspect at site shall light a red indication on the control panel and give an
audible warning for the same. Such indication may cover a group of
signals. A common audible warning can also be provided for a group of
signals. It shall be possible to silence the audible warning by pressing a
push button. Such cancellation of audible warning shall not apply to
subsequent failures for which the push button must be pressed again.

Chapter 21: Relay & Electronic Interlocking Page 436 of 535