Page 583 - IRSEM_Main Book

S No Term Description/Meaning in SEM Relevant paras
47 Digital Axle Digital axle counters which use Digital Electronics & software to identify & display whether a 17.6.1 (a),(c), 17.7.2 (a),
Counter (DAC) concerned Track section is Clear or Occupied 21.4.3 (b)
On a double line, the direction for which the line is signalled, On a single line, the direction 8.1.1 (b),18.12.1 (m),
Direction Of
48 for the time being established, under the system of working, to allow trains to move in that 18.12.5, 20.1.3(c),
Traffic
direction; 20.1.4 (b), 20.3.3.
Driver Machine The interface to enable direct interaction between the on-board equipment of ATP and the 13.1.5(e), 13.2.3(b),
49 Interface (DMI) Loco Pilot. 13.2.7(a)(b), 13.3.3 (c),
13.3.6
50 Dual Detection It is an additional detection provided in addition to Main Detection to enhance availability. 9.2.2(d),
Annexure:18-A5

Dynamic The speed/distance profile that a train may follow without violating the static speed profile 13.1.5(b)
51
Speed Profile and/or the end of movement authority.
Data Logger DLMC is a place extensively used for monitoring of Relay Room door opening, fire alarm, 3.1.4(c),
52 Management Power supply/Battery voltages, ELD and other Specified signalling/Telecom gears 3.7.1(a)(c)(d)(e)
Center (DLMC) continuously or regularly generally situated at divisional HQ.
Electrical Means a telephone instrument (including Mobile communication equipment/VHF walkie-
53 Communication talkie Set)
Instrument
Emergency Application of a maximum brake force in order to stop the train in the shortest distance 13.1.5(f), 13.2.3(b),
54
Brake 13.2.4 (c)(f), 13.2.5.
Emergency Is the distance travelled by train before coming to a Dead stop by application of Emergency 7.1.13(b), 20.4.1,
55 Braking Brake by Loco-pilot. (Note: For signalling purpose, EBD is reckoned from a Signal displaying a 7.1.15(e), 14.1.7(d),
Distance (EBD) ‘Attention’ aspect to the signal displaying a ‘Stop’ aspect) 14.1.9(b)
End of
56 Location up to which the train is permitted to proceed and where target speed is zero.
Authority
Points are facing or trailing in accordance with the direction a train or vehicle moves over 7.4.12(a,b), 12.4.3,
Facing And
57 them. Points are said to be facing points when by their operation a train approaching them 12.4.4, 12.11.6,
Trailing Points
can be directly diverted from the line upon which it is running. 12.14.1, 12.14.5
58 Failure Mode Manner in which failure occurs.

Annexure: G4: Glossary of Technical Terms for Signal Engineering Manual Page 519 of 535