Solenoid stopper switch

Types of solenoid stopper switches

A solenoid stopper switch is an electromechanical device that combines a switch and a solenoid. When activated by an electric current, the solenoid plunger moves in or out, either making or breaking an electrical circuit. The stopper switch works like a relay, allowing for the control of higher voltage circuits through a low-voltage switch.

Like many other electrical components, solenoid stopper switches come in different varieties to suit specific applications; they include;

• Normally Open (NO) Solenoid Stopper Switch: This type of solenoid switch is open (off) in its default state. When current flows through the coil, the plunger is activated and moves into the cylinder, closing (turning on) the circuit. Normally open solenoid stopper switches are used in applications where the circuit only needs to be turned on for a limited amount of time and off later. For instance, in a car ignition system, the circuit is only needed to activate the engine for a brief moment and then turned off.
• Normally Closed (NC) Solenoid Stopper Switch: This type of solenoid stopper switch is closed in its default state. The circuit can be turned on and off by pressing the switch plunger either manually or with a solenoid coil. Normally closed solenoid switches are used in applications where the circuit is only required to be turned off for a limited time and then turned on again, such as the circuit for opening and closing a door.
• Momentary Contact Solenoid Stopper Switch: This stopper switch type is designed to make or break the circuit only briefly when the switch plunger is pressed. The momentary contact solenoid stopper switch is widely used in push button applications where the circuit has to be turned on or off only for a limited time, like in the case of a doorbell or a power tool trigger switch.
• Latching Solenoid Stopper Switch: Latching solenoid switches move to either of two positions and remain there until the switch is pressed again. They are used in applications where the switch status needs to be retained even when power is removed, like in an alarm system or a motor control circuit.

Function and Feature of solenoid stopper switch

There are several features and functions of solenoid switches restraining or stopper like;

• Stopper mechanism: As previously stated, these restraining switches employ solenoids to operate a rod or plunger that, when activated, moves into the path of an object and prevents further movement. This mechanism provides a means of stopping or holding something in place.
• Safety devices: These switches serve as safety devices in various systems and machines. For example, they can prevent the rotation of a dangerous moving part or block the descent of a heavy object. By stopping or restraining such movements, solenoid stopper switches help protect personnel and equipment from accidents or damage.
• Control features: The control features of solenoid restraining switches are similar to those of regular solenoid switches. They can be remotely operated using electrical signals, allowing for convenient control from a distance. The operation of restraining switches can also be interlocked with other conditions or processes to ensure proper sequence and safety. Manual override options are often available to release the restraint in case of emergency or failure.
• Durability: These switches are designed to withstand regular operation in industrial or demanding environments. They are typically built with durable materials and components to ensure long-lasting performance, even under rigorous conditions of use.
• Versatility: These switches are used in various applications and industries, including manufacturing, transportation, and security systems. Their versatility makes them suitable for restraining or stopping movements in different contexts.
• Electrical control: With electrical control through solenoid activation, these switches provide an efficient and reliable means of stopping or restraining movements, enhancing safety and control in various systems.

Features and functions of the solenoid stopper switch include;

• Electromagnetic actuation: The switch is operated by an electromagnetic solenoid. When the solenoid coil is energized, it creates a magnetic field that pulls the movable armature into the coil, closing the switch contacts. De-energizing the coil causes a spring to return the armature to its original position, opening the contacts. This provides remote, electrical control of the switch.
• Form A (normal open) or Form B (normal closed) contacts available: Form A switches are normally open and close when energized, while Form B switches are normally closed and open when energized. This allows flexibility in contact configuration needed for different control circuits.
• Changeover contacts (SPDT) for additional circuitry: Some solenoid switches also feature changeover or double pole contacts (SPDT) that can switch two different circuits simultaneously. This expands the versatility of the switch in controlling multiple devices or circuits.
• Mounting options: The switches can be panel mounted or mounted in any position for easy integration into existing control systems. Their compact size allows them to fit into tight spaces.
• Applications in automation, control systems, and safety devices: These solenoid switches are suitable for use in industrial automation, control panels, and as safety interlocks to electrically control the stopping or activation of a circuit in various machinery and systems.

Applications of solenoid stopper switch

• Automobile Industry:

  Automakers use solenoid switches to lock the steering wheel and gearshift as an anti-theft measure. When the system activates, the gearshift and steering lock up, immobilizing the vehicle. Only the correct key fob or manual override deactivation system will unlock the gearshift and steering to start the car. This implementation provides an additional layer of protection against unauthorized vehicle entry and ignition attempts.

• Industrial Equipment:

  Solenoid stopper switches are useful in industrial equipment for safety and stopping functions. They secure critical equipment like hydraulic presses, lathes, drills, etc. Operators can quickly activate the emergency stop to shut down the machine in dangerous situations. This immediately halts all operations to prevent accidents.

• Home and Office:

  These devices can serve useful functions in everyday home or office environments too. They can disable one's coffee machines, fans, or even lights remotely with integrated solenoids and smart technology. Incorporating these controls into the broader smart home ecosystem allows users to regulate device functions through smartphone apps. Users can monitor and control appliance usage, enhancing energy efficiency and convenience. Homeowners can integrate them into their security systems for added peace of mind. Proprietors of offices and commercial establishments can utilize them as part of their workplace policies to exercise control over the use of office equipment.

How to choose solenoid stopper switch

There are several factors to consider when choosing solenoid shutoff valves. They are as follows;

• Application: It is essential to identify the application. It helps to know the type and model suitable for the application. Valves can be used for liquid, air, and steam control. Also, check if the valve is normally open (NO), normally closed (NC), or last-position controlled (LP).
• Voltage and power requirements: Manufacturers should consider the voltage and power requirements of the solenoid valve based before installation. Choosing stopper switches with different voltage levels helps to suit various applications. Also, selecting valves with low power consumption is economical and efficient.
• Size and flow rate: Make sure the size of the valve matches the required size. This will ensure the switch delivers the appropriate flow rate for the application. Choosing the right size and flow rate prevents failure or underperformance.
• Pressure rating: This refers to the maximum pressure the valve can handle. It is crucial to determine the pressure rating of the application. This ensures the switch can withstand the required pressure without damage.
• Prevention of premature failure: To ensure the stopper switch operates effectively and avoid premature failure, it is crucial to provide regular maintenance, use protective enclosures, and correctly install the switches. Another vital factor is environmental conditions, which play a significant role in the longevity of the switch. Humidity, temperature, and exposure to dust and vapors may affect the operation of the switch. Therefore, take proper precautions to minimize their impact.
• Material: Make sure the material of the stoppage switch is compatible with the fluid medium. For example, choose brass or stainless steel for corrosive fluids and fluids with high temperatures.
• Control and wiring: Consider the wiring system and control method of the solenoid valve. They can be wired for remote control or open/closed position control. Also, choose stopper switches with manual override for emergency situations or to maintain equipment.
• Standards and certifications: Check if the solenoid stopper switch meets international standards for safety and quality. That includes ATEX, ANSI, and IECEX. These certifications prove that the valve has been tested and complies with industry regulations.

Q&A

Q1: How are solenoid stopper switches maintained?

A1: Routine maintenance is usually minimal and might consist of checking for loose connections and ensuring the switch is clean and free of debris.

Q2: Can solenoid switches be repaired if they malfunction?

A2: Some solenoid switches may be repairable, but in most cases, replacing the entire unit is more cost-effective.

Q3: Are there any safety precautions to take when using solenoid switches?

A3: Yes, ensure all electrical connections are secure and prevent false actuations. Also, use switches rated for the load to avoid overheating.

Q4: Can solenoid switches be used for battery isolation?

A4: Yes, they are commonly used in automotive and marine applications to disconnect the battery completely.

Q5: What features should be considered when selecting a solenoid stopper switch?

A5: Important features to consider include voltage and current rating, type of actuator, and safety features like a manual override and arc suppression.