The Austdac pullkey or cable-pull limit switch type ESS3 finds many applications in controlling distributed plant such as conveyors or belts used in the mining or materials handling industries. The pull key is used to provide controlled stop functions for distributed plant or conveyors. The pull key can be operated using the front centrally located knob or each of the two side located flexible cable-pull actuators. The side cable-pull actuators can be used in tensioned and non-tensioned systems.