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| Shape / Structure | General-purpose Limit switches |
|---|---|
| service life | General type |
| Operating mechanism | Snap action |
| Actuator | Plunger (10 dia., Stainless steel plunger) |
| Electrical ratings | 4 A at 30 VDC |
| Frequency | 50/60 Hz |
| Leakage current | Approx. 1.7 mA |
| Switching mechanism | Self-reset mechanism |
| Contact configuration | Single-Pole, Double-Throw type |
| Contact form | 1c |
| Load | General load |
| Ratings (DC): Non-Inductive load | Rated voltage: 30 VDC, Resistive load: 4 A (NC) 4 A (NO), Lamp load: 2 A (NC) 2 A (NO) |
| Ratings (DC): Inductive load | Rated voltage: 30 VDC, Inductive load: 3 A (NC) 3 A (NO), Motor load: 3 A (NC) 3 A (NO) |
| Explanation | The above values indicate the steady-state current. Lamp load has an inrush current of 10 times the steady-state current. Inductive load has a power factor of 0.4 Min. (AC) and a time constant of 7 ms Max. (DC). Motor load has an inrush current of 6 times the steady-state current. |
| Inrush current | NC: 20 A NO: 10 A |
| Protective circuit | Classification of protection against electric shock: Class I (with ground terminal) Short-circuit protective device: 10 A fuse type gI or gG (IEC269) |
| Indicator | LED (Light when not operating) Voltage: 30 VDC Leakage current: Approx. 1.7 mA |
| Earth terminal | With ground terminal |
| Cable specifications | VCTF, 4 cores (5 m) Diameter: 7.6 mm |
| Ambient temperature | Operating: -10 CEL to 70 CEL (with no icing or condensation) |
| Ambient humidity | Operating: 35%RH to 95%RH (with no icing or condensation) |
| Permissible operating speed | 0.1 mm/s to 0.5 m/s |
|---|---|
| Permissible operating frequency (Mechanically) | 120 operations / 1 minute Max. |
| Permissible operating frequency (Electrically) | 30 operations / 1 minute Max. |
| Contact resistance | 400 m Ohm Max. (Initial value) * Including the resistance of cable. (Measuring method is contact resistance meter.) |
| Insulation resistance | Between each terminal of the same polarities: 100 M Ohm Min. Between live-metallic part and ground: 100 M Ohm Min. Between each terminal and non-live-metallic part: 100 M Ohm Min. (Condition, at 500 VDC Megger) |
| Dielectric strength | Between each terminal of the same polarities: 1,000 VAC Between live-metallic part and ground: 1,500 VAC Between each terminal and non-live-metallic part: 1,500 VAC (Condition, 50/60 Hz for 1 min) |
| Durability (Mechanically) | 10,000,000 operations Min. (No load) (Temperature, Humidityconditions: 5 CEL to 35 CEL, 40 %RH to 70 %RH) |
| Durability (Electrically) | 1,000,000 operations Min. (Resistive load 1 A at 30 VDC) (Temperature, Humidityconditions: 5 CEL to 35 CEL, 40 %RH to 70 %RH) |
| Vibration resistance (Malfunction) | Vibration frequency range: 10 to 55 Hz, Double amplitude: 1.5 mm, Contact opening: 1 ms Max. at the free position and the total travel position. |
| Shock resistance (Destruction) | 1,000 m/s2 |
| Shock resistance (Malfunction) | Contact opening is 1 ms Max. at the free position and the total travel position at 500 m/s2. |
| Degree of protection | IEC60529 (JEM): IP67 |
| Applicable standard (UL) | Standard No.: UL508 File number: E76675 |
| Mounting specification | Front mounting |
| Operating Force (OF) | Standard value 11.77 N Max. |
|---|---|
| Release Force (RF) | Standard value 4.41 N Min. |
| Pre-Travel (PT) | Standard value 1.8 mm Max. |
| Over-Travel (OT) | Standard value 3 mm Min. |
| Movement Differential (MD) | Standard value 0.2 mm Max. |
| Operating Position (OP) | Standard value 15.7 +/- 1 mm |
Precautions for correct use:
Make sure that the panel to which the switch is mounted is flat. If the panel is warped or has protruding part, the switch may malfunction.
As of March 1, 2008
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