The global site of the UK's leading magazine for automation, motion engineering and power transmission
29 January, 2023

LinkedIn
Twitter
Twitter link

Electronic cable-pull switch is ‘the world's most advanced’

15 May, 2017

Rockwell Automation has developed what it claims is the world’s first solid-state cable-pull emergency-stop device, which uses a microprocessor-based technology to monitor and compensate for any thermal expansion or sagging of the trip-wire.

Traditional cable-pull switches are prone to nuisance trips and can be unreliable because of temperature-related changes in the cable tension. A patented rope-monitoring system in the new Allen-Bradley Guardmaster Lifeline 5 cable-pull switch compensates automatically for thermal expansion and cable sag.

“Because the Lifeline 5 cable-pull switch is a solid-state switch, there is no mechanical wear that is often associated with traditional switches,” says Rockwell’s product manager, Steve Tambeau. “That means increased uptime and more reliable safety function over a longer duty cycle.”

The new switch provides constant access to the E-stop function, allowing operators to prevent machine hazards with a simple pull of the attached cable. LED indicators help to tension the cable for quick, precise set-ups, while also providing switch status and diagnostics during operation, simplifying maintenance and troubleshooting.

Rockwell Automation's microprocessor-based cable-pull E-stop is designed to reduce nuisance trips

The switch is available in IP66 die-cast aluminium or IP67 stainless-steel housings. The aluminium model offers an optional built-in E-stop button.




Magazine
  • To view a digital copy of the latest issue of Drives & Controls, click here.

    To visit the digital library of past issues, click here

    To subscribe to the magazine, click here

     

Poll

"Do you think that robots create or destroy jobs?"

Newsletter
Newsletter

Events

Most Read Articles