Safety Limit Switch [D4B-□N]
Caution
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).
Dimensional Drawing of OMRON Limit Switch
Note: The dimensional tolerance of the parts not specified in the above external dimension diagrams for each model is ±0.4 mm.
*1. The lever can be fixed at any position by inverting the set position indicator plate.
*2. In terms of mechanism, it is not a safety Limit Switch but a general Limit Switch.
Specification Table of OMRON Limit Switch
Limit Switch structure
Limit Switch Performance
| Protective structure*1 | IP67 (EN60947-5-1) | |
|---|---|---|
| Durability*2 | Mechanical | Over 30 million times (snap action) Over 10 million times (slow action) |
| Limit Switch Electrical | Over 500,000 times (AC250V 10A resistive load) | |
| Allowable Operating Speed | 1mm to 0.5m/s | |
| Allowable operating frequency | Mechanical | 120 times/min |
| Limit Switch Electrical | 30 times/min | |
| Contact Resistance | 25mΩ or less | |
| Minimum applicable load*3 | DC5V 180mA Resistive load (N level reference value) | |
| Rated insulation voltage (Ui) | 600V (EN60947-5-1) | |
| Rated Frequency | 50/60Hz | |
| Electric shock protection class | Class I (with earth terminal) | |
| Pollution level (usage environment) | Pollution degree 3 (EN60947-5-1) | |
| Impulse withstand voltage (EN60947-5-1) | Between same-polarity terminals | 2.5kV (snap action)/4kV (slow action) |
| Between different terminals | 4kV (slow action) | |
| Between each terminal and earth | 4kV | |
| Insulation resistance | Between Limit Switch of the same polarity, and between terminals and non-current-carrying metal parts: 100MΩ or more (at 500V DC) | |
| Contact Gap | Min. 2 x 2mm (slow action) Min. 2 x 0.5mm (snap action) | |
| vibration | malfunction | 10 to 55Hz, single amplitude 0.75mm |
| impact | Durability | 1,000m/s2 ormore |
| malfunction | 300m/s2 ormore | |
| Conditional Short Circuit Current | 100A (EN60947-5-1) | |
| Rated sealed thermal current (Ithe) | 20A (EN60947-5-1) | |
| Ambient temperature | -40 to +80℃ (but do not freeze) | |
| Ambient humidity | 95% RH or less | |
| mass | Approx. 250g | |
Note 1. The above values are initial values.
2. The above values may differ depending on the model.
*1. This protection structure is based on a test method based on the standard (EN60947-5-1), so please check the sealing performance in the actual environment and conditions of use in advance.
*2. The durability conditions are for 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 Limit Switch frequency, environmental conditions, reliability level, etc. Please check with the actual load in advance.