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PATH Control System
PATH Underground Commuter Railway Traction Power Control System

Owner:
Port Authority of NY & NJ

Location:
Metro New York City, NY
Project Description:
The Port Authority of New York and New Jersey operates a rapid transit system under the name Port Authority Trans-Hudson (PATH). Transporting over 215,000 passengers each day, PATH currently connects midtown Manhattan (from a terminal at 33rd Street and 6th Avenue) with Hoboken, Jersey City and Newark, New Jersey.

Transdyn provided a traction power control, life safety monitoring, and facilities management system for the entire PATH system. The system consists of eleven fully redundant and seven non-redundant control systems in the eighteen stations on the PATH line. Each fully redundant system consists of dual Programmable Logic Controllers (PLCs), redundant I/O, redundant relaying and positive feedback from each control output relay. Seven of the stations have an emergency backup control system consisting of a local computer controlled system executing the DYNACTM software suite, a local workstation, and network interface to the PLC. The local control center backup systems provide data acquisition and control capabilities for over 5000 I/O points allocated for power distribution, safety circuits, ventilation, security and other station facilities.