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Entrance-Exit Interlocking (NX) was the original brand name of the first generation relay-based centralized traffic control (CTC) interlocking system introduced in 1936 by GRS [13] (represented in Europe by Metropolitan-Vickers). The advent of all electric interlocking technology allowed for more automated route setting procedures as opposed to ...
WESTLOCK Interlocking is a Computer-based interlocking (CBI) product now sold and maintained by Siemens Mobility Limited, following their purchase of Westinghouse Rail Systems. Westlock builds on many of the features that made SSI popular in the United Kingdom. This includes re-use of SSI's programming language and its track-side hardware.
An SSI interlocking cubicle comprises three Interlocking Processors or Multi Processor Modules (MPMs), two Panel Processors and a Diagnostics Processor (DMPM). An SSI system can operate on two MPMs in the event of the failure of one. It does not need the DMPM to function as an interlocking, as this drives the technician's terminal only.
Computer-based interlocking is railway signal interlocking implemented with computers, rather than using older technologies such as relays or mechanics. General
An interlocking system using mechanical technology could be expected to last up to 80 years but electronic interlocking equipment has a shorter lifetime, between 15 and 20 years. [ 3 ] The high cost of railway signalling equipment and the fact that until recently, suppliers operated mostly within national borders, resulted in a significant ...
Trapped key interlock switchgear door. An interlock is a feature that makes the state of two mechanisms or functions mutually dependent. It may consist of any electrical or mechanical devices, or systems. In most applications, an interlock is used to help prevent any damage to the machine or to the operator handling the machine.
Electropneumatic signalling and interlocking was to be installed, but was installed at Gympie instead, so that Ipswich retained its mechanical interlocking system. A third railway station was eventually built in 1974. [1] The other major feature remaining from the railway infrastructure is a locomotive turntable.
Communications-based train control (CBTC) is a railway signaling system that uses telecommunications between the train and track equipment for traffic management and infrastructure control. CBTC allows a train's position to be known more accurately than with traditional signaling systems. This can make railway traffic management safer and more ...