Interlocking - Alstom

VPI ® Vital and Non-Vital Interlocking ControlInterlocking> A Solution for All SizesAlstom VPI Interlocking Control Systems have set the worldwide standardfor microprocessor-based interlocking control. From the smallest endof-sidingto large installations like Grand Central Terminal in New YorkCity, Alstom’s VPI system and microprocessor-based components usevital logic to allow customers to meet their needs for vital and non-vitalwayside control and communication.> A Strong Safety RecordThe microprocessor-based VPI Interlocking Control System has beenindependently audited for safety by the London Underground Limited,Dutch National Railway, CP Rail, Metro-North Commuter Railroad,Queensland Railroad (Australia), and Bay Area Rapid Transit (BART).Since the first installation in 1986 there have been no unsafe failures, anunblemished record of VPI Controlled Vital System Operation in excessof 90 million hours.> Easy InterfaceVPI surpasses relay-based systems as one unit can replace hundredsof relays. VPI resides in a significantly reduced space, provides serialcommunications that reduce the time and cost associated with cabling,and can be configured in a redundant arrangement. Customers caneasily interface VPI systems to other vital and non-vital waysideequipment, local control panels, and central office provided by Alstom orother suppliers. VPI system software includes extensive self-diagnosticcapability. Because of these built-in capabilities, most maintenance,troubleshooting and system testing tasks require only a simple terminalinterface such as a laptop or hand-held terminal to isolate the failureto a specific circuit board or input/output port. This makes testingsimple and straightforward. Test engineers also benefit from having todo limited retests of specific functions due to VPI’s ability to accuratelyidentify program revisions.> Enhanced VPIVPI has undergone several upgrades to the core hardware and softwareover the past 20 years to fulfill our customers demands and expectations.VPI II refers to recent key improvements made to the core portfoliothat allow for much more added functionality which are focused onperformance and maintainability. These enhancements address the fullcycle of interlocking control with improvements in design, verification,test functions and maintenance, which achieves a significant increase insystem performance.38CALL 800.717.4477 • FAX 585.274.8777