Safety Limit Switch [D4B-*N]
Caution
- The product images are representative only. Specifications may vary by part number, including shape and color.
Product Description
Robust safety limit switch with metallic housing.
Certified with direct opening mechanism for both slow action and snap action types.
[Features]
· Direct opening mechanism (only at NC contact side) that opens the contact when an abnormality occurs in contact welding, etc.
· Realized a safety lever setting by using a mechanism where the lever is interlocked with the operating position display board.
· Also equipped with proper operation zone display mechanism.
· Single-action switching between left and right operation directions.
· The sealing structure of the head is reinforced to improve sealing properties (TÜV: IEC IP67, UL: NEMA3, 4, 4X, 6P, 13).
Drawing
*The dimensional tolerance for the parts not specified in the drawings of each model above is +/- 0.4 mm.
*1. By reversing the set position indicator plate, the lever can be fixed in any desired position.
*2. Due to the mechanism, this is a general limit switch, not a safety limit switch.
Product Specification
Structure
Performance
| Protective structure*1 | IP67 (EN60947-5-1) | |
|---|---|---|
| Durability*2 | Mechanical | Over 30 million operations (snap action), over 10 million operations (slow action) |
| Electrical | 500,000 operations or more (250 V AC 10 A resistive load) | |
| Allowable operation speed | 1 mm to 0.5 m/s | |
| Allowable operation frequency | Mechanical | 120 times/min |
| Electrical | 30 times/min | |
| Contact resistance | 25 mΩ or less | |
| Minimum applicable load*3 | 5 V DC 180 mA resistive load (N level reference value) | |
| Rated insulation voltage (Ui) | 600 V (EN60947-5-1) | |
| Rated frequency | 50/60 Hz | |
| Appliance Class | Class I (with earth terminal) | |
| Pollution degree (operating environment) | Pollution degree 3 (EN60947-5-1) | |
| Impulse withstand voltage (EN60947-5-1) | Between terminals of the same polarity | 2.5 kV (snap action) / 4 kV (slow action) |
| Between different pole terminals | 4 kV (Slow action) | |
| Between each terminal and earth | 4 kV | |
| Insulation resistance | 100 MΩ or more between same pole terminals, and between terminals and non-live metal part (500 V DC, insulation resistance tester) | |
| Contact gap | Minimum 2 x 2 mm (slow action), minimum 2 x 0.5 mm (snap action) | |
| Vibration | Malfunction | 10 to 55 Hz, Half amplitude 0.75 mm |
| Impact | Endurance | 1,000 m/s2 or more |
| Malfunction | 300 m/s2 or more | |
| Conditional short circuit current | 100 A (EN60947-5-1) | |
| Conventional enclosed thermal current (Ithe) | 20 A (EN60947-5-1) | |
| Operating ambient temperature | -40 to +80°C (no freezing) | |
| Operating Ambient Humidity | 95% RH or less | |
| Weight | Approximately 250 g | |
*1. The values given above are initial values.
2. Depending on the model, the above contents may differ.
*1. This protective structure is based on test methods according to the standard (EN60947-5-1). Please confirm the sealing performance in advance under the actual operating environment and usage conditions.
*2. The durability conditions are based on an ambient temperature of 5 to 35°C and an ambient humidity of 40 to 70% RH.
*3. This value may vary depending on the switching frequency, environmental conditions, and reliability level. Please check with the actual load in advance.