Hydraulic Elevator Modernization 

Traction Elevator Modernization

Original DC machine room with relay logic DC controllers and DC machines. Modernized duplex machine room with new controllers, traction machines, and governors.
Replacement Controllers for a modernization of duplex traction elevators

This project required a nearly complete modernization. The project included replacing the elevator controllers, hoist machines & governors.


  • Smooth, reliable, and quiet operation.
  • New AC drives and motors eliminate MG sets, carbon brushes, contamination from carbon dusting.
  • PLC based controllers are none proprietary - Open system & software.
  • Easy to maintain, and find parts, at reasonable costs.
  • Energy consumption cut by up to 50%.




Copyright 2003 The Lardner Elevator Company
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