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Heavy-duty Limit Switch

Heavy-duty Limit Switch DQX1 from China Suppliers - Reliable Factory for AC/DC Control Circuits

The DQX-GL-□/□ series limit switches are expertly designed for control circuits operating at 50Hz AC, with a rated working voltage up to 380V, and DC rated working voltage reaching 220V. These switches serve as essential components for travel limit and terminal protection in mobile mechanical translation mechanisms. Manufactured in China, our products meet the rigorous standards set forth by GB/T14048.5-2017, ensuring reliability and safety. As a leading factory and supplier in the industry, we are committed to delivering high-quality limit switches to meet your operational needs
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    Product Detail

    Advantage

    All products of the company can be customized for production according to user usage scenarios.

    Product Introduction

    DQX-GL-□/□ series limit switches are suitable for control circuits with AC 50Hz, rated working voltage up to 380V, and DC rated working voltage up to 220V as travel limit and terminal protection for mobile mechanical translation mechanisms. This product complies with GB/T14048.5-2017 standard.

    Works

    The worm wheel is driven by the drum shaft to rotate, and the cam on the worm wheel shaft also rotates. When it rotates to a certain position, the flange of the cam contacts the limit switch, which actuates the limit switch, cuts off the power source for rising or falling, and stops the hoist at the limit position. This product is equipped with four limit switches, which can be set according to user needs. Generally, two protections can be set for rising or falling, namely alarm limit and protection limit.
    Use Category AC-15 DC-13
    Rated operating voltage AC250 DC220
    Rated operating current 2 0.09
    Rated thermal current 10 10
    Rated insulation voltage 400
    Protection class IP54

    Construction Introduction

    The limit switch housing is made of die-cast aluminum, and the surface is sprayed with aluminum powder alkyd heat-resistant paint. The contact of the limit switch is disconnected by the operating arm driving the shaft to make the cam on the shaft move. The cam and the adjustment sleeve on the shaft are evenly equipped with 24 teeth on the circumference of φ26. The cam angle can be adjusted as needed to achieve the required closing procedure. When adjusting, just remove the screws on the end cover and the adjustment sleeve. The rocker arm can also be adjusted arbitrarily within 360 degrees (every 15 degrees), see Figure 1.

    The protection level of the limit switch is IP44.

    Working Conditions

    • 1
      Altitude
      The altitude of the installation location does not exceed 2,000 meters.
    • 2
      Medium Temperature
      The ambient air medium temperature is not higher than +75℃ and not lower than -25℃.
    • 3
      Relative Humidity
      The average relative air humidity in the wettest month of the installation location is not greater than 90% (the average minimum temperature in the month is not greater than +25°C).
    • 4
      Pollution Level
      The pollution level of environmental conditions is Level III.
    • 5
      Installation Category
      The installation category is Category I.
    • 6
      Types of Limit Switches
      Structural types are rotary type, with speed ratios of 80:1, 40:1, and 20:1. The limit switch can be equipped with up to 8 control loops.

    Overall and Installation Dimensions

    Figure 1 - DQX-GL Limit Switch Installation Dimensions

    Frequently Asked Questions (FAQ)

    Can the DQX-GL series limit switches be customized?
    Yes, all products of the company can be customized for production according to specific user usage scenarios.
    What are the electrical ratings for the DQX-GL series limit switches?
    The rated insulation voltage is 400V. Under AC-15, the rated operating voltage is AC250V with a current of 2A. Under DC-13, the rated operating voltage is DC220V with a current of 0.09A. The rated thermal current is 10A.
    How does the limit switch cut off power at limit positions?
    The worm wheel is driven by the drum shaft to rotate the cam. When it reaches a set position, the cam flange contacts the limit switch, actuating it to cut off the rising or falling power source and stop the hoist.
    What is the protection level of the switch housing?
    The limit switch housing is made of die-cast aluminum with a protection level of IP44, while the internal electrical use categories comply with IP54 protection standards.
    What are the limit switch structural types and speed ratios?
    This product is a rotary type limit switch. It features speed ratios of 80:1, 40:1, and 20:1, and can be equipped with up to 8 control loops.
    What are the ambient temperature limits for installation?
    The limit switch is designed to operate in ambient air medium temperatures not higher than +75℃ and not lower than -25℃.

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