Question
What is direct opening force (DOF)?
Answer
Refer to the following table of terms for operating characteristics.
Operating Status | ||||
Classification | Term | Abbreviation | Unit | Definition |
Force | Operating Force | OF | N, Nm | The force needed to be applied to the Actuator to move from the free position to the operating position. |
Direct Opening Force | DOF (See note 2.) | N, Nm | The force needed to be applied to the Actuator to move from the operating position to the direct opening position. | |
Total Travel Force | TTF | N, Nm | The force needed to be applied to the Actuator to move from the free position to the total travel position. | |
Travel | Pretravel | PT | mm, ° | The travel distance or angle from the free position to the travel position of the Actuator. |
Direct Opening Travel | DOT (See note 2.) | mm, ° | The travel distance or angle from the free position to the direct opening position of the Actuator. | |
Total Travel | TT | mm, ° | The travel distance or angle of the Actuator from the free position to the total travel position. | |
Position | Free Position | FP | mm, ° | The Actuator position when no external force is applied. |
Operating Position | OP (See note 1.) | mm, ° | The position where the moving contact starts to open or close when an external force is applied to the Actuator. | |
Total Travel Position | TTP | mm, ° | The Actuator position when the Actuator has reached the stopper. |
Note 1:
For slow-operating safety switches, the operating position (OP) and return position (RP) are almost identical.
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