Services Offered >> Design >> Electrical Design >> Digital Hoist Supervisor (DHS) Hoist Overtravel and Overspeed Protection System

The advent of PLC controls in mine hoisting resulted in the development of the Digital Hoist Supervisor, or DHS, a modernization of the classic mechanical Lilly controller.  A system of redundant PLCs and position encoders provides overspeed and overtravel protection for all positions in the shaft, for all types of hoists.  The Tiley DHS is also self-monitoring and provides more operational data (through an HMI interface) to the operator for troubleshooting of faults.  The DHS may be integrated with a new Tiley hoist control system, or as a stand-alone retrofit to an existing hoist control system.  Regulatory approved since 1996 in Ontario, the DHS has been installed in Canada, the USA, Venezuela, Peru, and Brazil.


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