FAQ No. FAQ02364
Question
What is direct opening travel (DOT)?
Answer
Refer to the following table of
terms for operating characteristic.
|
Operation status | |
 |
| Feature |
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. |
Direct
Opening
Position |
DOP
(See note 2.) |
mm, ° |
The Actuator position when the moving contacts are directly open 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.
Note 2: The DOF, DOT, and DOP values were specified to ensure that the
direct opening mechanism (forcibly opened contacts) functions correctly.
Other Safety Limit Switch
FAQs
 What is total travel (TT)?
|
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