Electric wire rope type hoists are used for cargo lifting. This type of hoist has a lover limit switch that automatically stops the motor when the limit switch detects slacking of the wire rope. This hoist should not be used for lifting human cargo.

FALL PREVENTION SAFETY DEVICE 
In case of emergencies such as the wire rope breaking, trouble with the hoist, an obstacle on the guide rail and so on, the eccentric cam roller actuates and holds the lift cage of prevent it from falling down. After the problem is corrected and the wire rope is wound (tensioned), the cam roller releases and the normal operation mode is restored automatically.