Switch Characteristics
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| -Contact forms | -Terminal codes | |||
| Diagram | Circuitry | Name | Code | Terminal |
| S.P.D.T. (Single-Pole-Double-Throw) |
COM | Common Terminal | ||
| S.P.S.T.-N.O. (Single-Pole-Single-Throw) (Normal-Open) |
NC | Normal-Close Termianl | ||
| S.P.S.T.-N.C. (Single-Pole-Single-Throw) (Normal-Close) |
NO | Normal-Open Terminal | ||
| S.P.S.T.-N.O.-DM (Single-Pole-Single-Throw) (Normal-Open, Double-Make) |
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| S.P.S.T.-N.O.-DMx2 (Single-Pole-Single-Throw) (Normal-Open, Double-Make x2) |
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- Definition of Operating Characteristics |
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Classification |
Term |
Abbreviation |
Unit |
Definition |
| Force | Operating Force | OF | cN | Amount of force applied to switch actuator to cause snap action contact from Free Position to Operating Position. |
| Release Force | RF | cN | Amount of force applied to switch actuator in order to move from Total Travel Position to Release Position. | |
| Total Travel Force | TTF | cN | Amount of force applied to actuator in order to move from Operating Position to Total Travel Position. | |
| Movement | Pre-Travel | PT | mm, angle | Distance or angle which actuator travels from Free Position to Operating Position. |
| Over-Travel | OT | mm, angle | Distance or angle which actuator travels from Operating Position to Total Travel Position. | |
| Movement-Differential | MD | mm, angle | Distance or angle which actuator travels from Operating Position to Release Position. | |
| Total Travel | TT | mm, angle | Distance or angle from actuator Free Positon to Total Travel Position. | |
| Position | Free Position | FP | mm, angle | Position of actuator when no external force is applied. |
| Operating Position | OP | mm, angle | Position of actuator at where contacts snap from Free Position to Operating Position. | |
| Release Position | RP | mm, angle | Position of actuator at where contacts snaps back from Operating Position to Free Position. | |
| Total Travel Positioin | TTP | mm, angle | Position at where actuator reaches Over-Travel limit. | |
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