Computer-based interlocking: Difference between revisions

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{{Short description|Railway signal interlocking using computers}}

'''Computer-based Based Interlockinginterlocking''' is the general term for a [[railway signallingsignal]] [[interlocking]] implemented with computers[[computer]]s, rather than theusing older technologies such as [[relays]] or [[mechanics]].

== General ==

CBIs are mostly implemented in two parts; a section that implements the safety and failsafe requirements, and a second section that implements "non-vital" controls and indications.

The European Union is working towards an EU standard within this area, called [[ERTMS]].

== Brands ==

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* [[Solid State Interlocking|SSI]] (Solid State Interlocking) - [[British Rail|BR]], [[Invensys]], [[GEC-General Signal]]

* [[Microlok II]]

* [[Smartlock]]

* Westlock

* Germany - Alister CBI from Funkwerk IT<ref>[[Railway Gazette International]] of July 2012, page 18</ref>

== Interface between different brands ==

When interfacing different brands of CBI equipment, it may be necessary to use relays of each regime, which are then hardwired from one to the other. This happens in the middle of the [[Channel Tunnel]] where French and British signalling equipment meet.

== Competition Rules ==

Since only some of the major signalling organisations make CBI equimentequipment, it was agreed that to prevent other players being left out in the cold, CBI equipment would be made available to those players at cost.{{citation needed|date=February 2019}}

== References ==

{{Reflist}}

{{Authority control}}

[[Category:Interlocking systems]]

{{Uncategorized|date=September 2011}}

[[Category:Rail infrastructure]]

{{rail-transport-stub}}