SpzcdZa Magnetic Reed Switch User Manual

1. Introduction

Thank you for choosing the SpzcdZa Magnetic Reed Switch. This manual provides essential information for the proper installation, operation, and maintenance of your magnetic contact switches. These switches are designed for various low-voltage applications, including door/window security alarms, LED lighting control, relay activation, and integration with GPS systems.

The package includes two sets of magnetic door switches, each consisting of a main switch unit and a magnet unit, along with screws for mounting on wood surfaces.

2. Safety Information

Please read and understand all safety instructions before installing or operating the device. Failure to do so may result in damage to the product or connected systems.

• Low Voltage Use Only: This magnetic reed switch is designed for low-voltage applications (DC 5V, 12V, 24V, up to 100V maximum switch voltage). Do not connect to high-voltage AC circuits.
• Current Limitations: The maximum switch current is 500mA, and the maximum switch power is 10W. Exceeding these limits can damage the switch and connected devices. For higher current loads, use an external relay controlled by the switch.
• Proper Wiring: Ensure correct wiring connections (NC/NO/COM) as per your application requirements. Incorrect wiring can lead to malfunction or damage.
• Mounting Surface: The included screws are for mounting on wood surfaces only. For other materials, use appropriate fasteners.
• Environmental Conditions: Avoid exposing the switch to extreme temperatures, moisture, or corrosive environments.

3. Product Overview

The SpzcdZa Magnetic Reed Switch consists of two main parts: the switch unit and the magnet unit. When the magnet is in close proximity to the switch unit, it changes the state of the internal reed switch.

Figure 3.1: SpzcdZa Magnetic Reed Switches (2 Sets)

Key Features:

• Contact Type: Normally Open (NO), Normally Closed (NC), and Common (COM) terminals for versatile applications.
• Trigger Range: Effective operation within a 5-20mm distance between the switch and magnet.
• Compact Design: Size: 55 x 12.5 x 11.5mm (2.17" x 0.45" x 0.45").
• Applications: Suitable for door/window alarms, LED control, relay triggering, and other low-voltage sensing needs.

Figure 3.2: Switch Dimensions and Terminal Identification

Figure 3.3: Screw Terminals (NO, NC, COM)

4. Setup and Installation

Follow these steps for proper installation of the magnetic reed switch:

1. Identify Mounting Location: Choose a clean, dry, and stable surface for mounting. For door/window applications, one part will be mounted on the stationary frame and the other on the moving door/window.
2. Determine Contact Type:
   • Normally Open (NO): The circuit is open (no current flow) when the magnet is present, and closes (current flows) when the magnet is removed. Connect to COM and NO terminals.
   • Normally Closed (NC): The circuit is closed (current flows) when the magnet is present, and opens (no current flow) when the magnet is removed. Connect to COM and NC terminals.
3. Wire Connections: Connect your low-voltage circuit wires to the appropriate screw terminals (NO, NC, COM) on the switch unit. Ensure connections are secure.
4. Positioning:
   • Mount the switch unit and the magnet unit parallel to each other.
   • Ensure the active side of the magnet aligns with the sensing area of the switch unit.
   • The optimal gap between the two units for reliable operation is between 5mm and 20mm when the door/window is closed (or in the desired "closed" state).
5. Mounting:
   • Use the provided screws to secure both the switch unit and the magnet unit to the chosen wooden surfaces.
   • Pre-drilling pilot holes may be necessary to prevent wood splitting.
   • For non-wood surfaces, use appropriate anchors and screws (not included).
6. Test Functionality: After installation, test the switch by opening and closing the door/window to ensure it triggers as expected in your circuit.

Figure 4.1: Assembled Switch and Magnet

5. Operating Principles

The magnetic reed switch operates based on the principle of a reed switch, which contains two ferromagnetic reeds enclosed in a sealed glass tube. When a magnetic field (from the magnet unit) is brought close to the reed switch, the reeds become magnetized and attract each other, causing them to touch and complete a circuit (closed state). When the magnetic field is removed, the reeds separate, breaking the circuit (open state).

The NO (Normally Open) and NC (Normally Closed) terminals provide flexibility for different circuit designs:

• NO (Normally Open): The circuit between COM and NO is open when the magnet is present (e.g., door closed). It closes when the magnet is removed (e.g., door opened). Ideal for triggering alarms or turning on lights when an entry point is opened.
• NC (Normally Closed): The circuit between COM and NC is closed when the magnet is present (e.g., door closed). It opens when the magnet is removed (e.g., door opened). Ideal for systems that require a continuous circuit when closed, and an interruption when opened.

Figure 5.1: Example Application (LED Control)

6. Maintenance

The SpzcdZa Magnetic Reed Switch requires minimal maintenance.

• Cleaning: Periodically wipe the switch and magnet units with a dry, soft cloth to remove dust or debris. Do not use abrasive cleaners or solvents.
• Inspection: Regularly check the mounting screws to ensure they are tight and the units are securely in place. Verify that the gap between the switch and magnet remains within the optimal 5-20mm range.
• Wiring: Inspect wiring connections for any signs of wear, corrosion, or looseness. Re-secure or replace as necessary.

7. Troubleshooting

If you experience issues with your magnetic reed switch, refer to the following common problems and solutions:

8. Specifications

9. Warranty and Support

SpzcdZa is committed to providing high-quality products and excellent customer service.

• After-Sales Service: If you are not satisfied with your Magnetic Reed Switch or have any questions, please contact us. We offer a 12-hour quick response service and are dedicated to resolving any issues to your satisfaction.
• Contact Information: For support, please refer to the seller's contact information on the platform where you purchased the product.