Page 181 - IRSEM_Main Book

(c) Station Master's Slot Control on Reception & Dispatch signals.

(i) The Station Master shall be provided slot control, over the Home, Last
Stop Signals, and on Calling-on Signals (where provided);

(ii) The Station Master's control over Home Signals can be dispensed with
only if all the following conditions are satisfied;

 All reception lines are fully track-circuited from Home Signal to
corresponding Last Stop Signal in double line and Home Signal to
Home Signal in Single line; or all reception lines are track-circuited
from the fouling mark to fouling mark and the non-track circuited
portion of the line from the fouling mark to the Home Signal is within
the range of visibility of the Cabin, from where signals & points are
operated.
 Station Master does not allot the line; and

 Assistant Station Master working in the Cabin operates the Points,
Block instruments and receptions/despatch signals.

7.6.7 Interlocking of Last Stop Signal and First Stop Signal with Block Working:
Where Absolute block working is in use;

(a) The Last Stop Signal shall not be capable of being taken ‘OFF’ until Line
Clear has been obtained from the block station in advance;

(b) It shall not be possible to close the line and grant or receive 'Line Clear’
unless the 'ON' aspect of the relevant First Stop Signal is proved.

7.6.8 Replacement of Stop Signals on passage of Train

(a) A stop signal in the 'OFF' position shall be replaced to 'ON' position
automatically by the passage of a train.

(i) Advanced Starter Signal shall be automatically replaced to 'ON'
position by the entry of a train into the block section.

(ii) Home Signal shall be automatically replaced to 'ON' position by the
passage of a train in advance of the Home Signal.
(iii) Starter Signal shall be automatically *replaced to 'ON' by the passage
of train.
(* with delay if replacement glued Joint/Insulation joint is close to signal,
please refer to Para no. 21.1.21 (Table-1))

(b) It shall also be possible to replace a manually controlled signal in the
'OFF' position to the 'ON' position manually.

Chapter 7: Essentials of Signalling Page 150 of 535