Skip to content
Talk to an Expert 1300 552 282
Securing Homes and Businesses Since 1993
Home Alarm Installations CCTV Installations 24/7 Back to Base Monitoring Security System Maintenance Intercom Installations Testing & Tagging Security Guard Hire Mobile Patrols Access Control
Designing a Magnetic Latch System
June 28, 2023

Designing a Magnetic Latch System: A Step-by-Step Guide

Designing a standalone magnetic latch system involves balancing functionality, safety, and automation. Whether you're building a secure access point or a simple locking mechanism, the following guide outlines the key considerations and components required for a successful build.

1. Define Your Requirements

Start by outlining the specific needs of your magnetic latch system. Key factors include:

  • Holding Force: How strong does the latch need to be?

  • Size Constraints: Is space limited in your application?

  • Power Consumption: Will the system run on mains power or battery?

  • Environment: Will it operate indoors, outdoors, or in harsh conditions?


2. Choose the Right Magnet

Select a magnet that meets your holding force and size requirements. Neodymium magnets are commonly preferred for their strength and compact form. When choosing, consider:

  • Shape and size

  • Material composition

  • Mounting configuration

FSH Magnetic Door Lock, Slimline Black Single Monitored, FSHFEM4300M-BLKGeneric Press to Exit Button

3. Design the Latch Mechanism

The latch should interface seamlessly with the magnet. This can range from a simple metal plate to a more advanced mechanical catch, depending on the required security level. Ensure the mechanism:

  • Locks securely when engaged

  • Disengages easily when released

  • Aligns correctly every time

Specialised Power Supply

4. Build the Housing and Mounting System

Develop an enclosure that safely houses the magnet and latch mechanism. Your design should factor in:

  • Structural strength and durability

  • Environmental protection (dust, moisture, etc.)

  • Mounting method (screws, brackets, adhesives)

5. Integrate a Control Mechanism

Determine how the latch will be activated:

  • Manual Operation: Simple push-to-exit buttons or key switches

  • Automated Operation: Sensors, timers, or electronic access control systems

If automating, include a control circuit to trigger the latch based on a user action, sensor input, or timed schedule.

6. Select a Suitable Power Supply

Your power source must support both the magnet and control mechanism:

  • Mains Power: Stable but needs fail-safe backup

  • Battery-Powered: Requires power-efficient design

For critical applications, include a backup battery to maintain operation during outages.

Back up Battery

7. Incorporate Safety Features

Safety is essential for all latch systems. Consider:

  • Backup power supply

  • Electromagnetic compatibility (EMC)

  • Operating temperature range

  • Compliance with safety standards and certifications


8. Add Automation with a Timer Module

For enhanced functionality, integrate a universal timer module to manage latch timing. This allows:

  • Delayed release or engagement

  • Re-locking after a preset time

  • Customised triggers based on entry/exit patterns

Relay Timer

9. Reference Configuration & Parts List

Below is an example setup using common security-grade components:

Final Tip

Remember, designing a magnetic latch system can be complex and each application has unique challenges. Always consult the datasheets and follow wiring diagrams closely. For complex or mission-critical installations, it's advisable to consult with a security system specialist like CTC Communications to ensure optimal performance and compliance.

Maglock set up with 2 Request to Exit

Filed in: Door Locks, Security Accessories, Security Accessories/Door locks, Security Accessories/Exit Button
Previous article Choosing the Best Hikvision CCTV System
Next article Enhancing Surveillance with AI Cameras