Solid State Interlocking
More on solid state Electronics
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Solid State Interlocking and its implementation methods affect three of the four components
a) The indoor arrangement which maintains logic for safe operation of trains
b) The medium connecting the indoor to the out door equipments
c) The interfacing arrangement at the indoor equipment and the outdoor equipment end for matching the medium
The main component is the indoor arrangement which uses computer based logic for ensuring the logic in the case of Solid State Interlocking arrangement.
In addition to this the introduction of Solid State interlocking arrangement also introduces certain changes in respect of the medium of interconnection and the interfacing arrangement in some design options.
The options which are possible are
For the medium
a) Conventional signaling cables which are basically power carrying copper cable normally multi core and armoured for protection.
b) Telecommunication cables using balanced copper conductors
c) Telecommunication cables coaxial cable
d) Optical Fiber cables
The interfacing method is dependant on the medium and the internal arrangement.
However the common type of interfacing used are:
a) Simple termination connecting the outdoor equipments to the indoor equipments through terminals of suitable design. Here the outdoor equipment is almost an extension of the indoor equipment with the outdoor equipment
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