DC12V Electric Mortise Lock Fail Safe Fail Secure | Time Delay
DC12V Electric Mortise Lock Fail Safe Fail Secure | Time Delay
LUCKING DOOR DC12V Electric Magnetic Mortise Door Lock – Fail Safe (NC) / Fail Secure (NO) with Adjustable Time Delay
Take control of your door access with the LUCKING DOOR DC12V Electric Magnetic Mortise Bolt Lock. Built from durable aluminum alloy and rated for over 500,000 operating cycles, this lock is engineered for long-term reliability in residential, commercial, and light industrial settings. It supports both Fail Safe (NC / 8-wire) and Fail Secure (NO / 9-wire) configurations, giving you the flexibility to choose the behavior that best fits your security requirements.
Understanding Fail Safe vs. Fail Secure
- Fail Safe (NC – 8 Wires): The door remains locked when power is ON and automatically unlocks when power is cut — ideal for emergency egress doors.
- Fail Secure (NO – 9 Wires): The door remains unlocked when power is ON and automatically locks when power is cut — ideal for secure rooms where locking on power loss is preferred.
Key Features
- Dual-mode operation: Select NC (Fail Safe) or NO (Fail Secure) to suit your installation
- Adjustable time delay: Set the delay to 0, 3, or 6 seconds to coordinate with access control systems
- Signal feedback function: Provides real-time door status output for integration with alarm or access systems
- Metal brushed panel: Sleek, professional finish that suits modern door hardware
- High durability: Rated for 500,000+ cycles without failure
- Aluminum alloy construction: Lightweight yet robust for everyday use
- Low power draw: Operates at just 150mA at DC12V — energy efficient and compatible with standard access control power supplies
Technical Specifications
| Brand | LUCKING DOOR |
| Model | B8L-NC / B8L-NO |
| Working Voltage | DC 12V |
| Working Current | 150mA |
| Fail Safe (NC) | 8-wire cable |
| Fail Secure (NO) | 9-wire cable |
| Time Delay | 0 / 3 / 6 seconds (adjustable) |
| Material | Aluminum alloy |
| Durability | 500,000+ cycles |
| Country of Origin | Made in China |
What's in the Box?
Please refer to the product images above for the full packing list and dimensional diagrams to ensure compatibility with your door and frame before installation.
Installation Tips
This mortise electric lock is designed for standard mortise door cutouts. Always verify door thickness and frame clearance before installation. Connect to a reliable DC12V access control power supply for optimal performance. For safety guidance on electrical installation, consult OSHA's Electrical Safety Guidelines.
Frequently Asked Questions
Q: What is the difference between the Fail Safe (NC) and Fail Secure (NO) versions of this electric mortise lock?
A: The Fail Safe (NC) version uses an 8-wire cable and keeps the door locked when power is ON — it unlocks automatically if power is lost, making it suitable for emergency exit doors. The Fail Secure (NO) version uses a 9-wire cable and keeps the door unlocked when power is ON — it locks automatically when power is cut, ideal for secure access rooms.
Q: Can I adjust the time delay on this DC12V electric mortise bolt lock?
A: Yes. The lock features an on-board adjustable time delay with three settings: 0 seconds, 3 seconds, and 6 seconds. This allows you to synchronize the lock's operation with your access control system or door closer for smooth, reliable entry management.
Q: What power supply does this electric door lock require?
A: This lock operates on a standard DC 12V power supply at 150mA. It is compatible with most off-the-shelf access control power supplies. Ensure your power supply can maintain a stable 12V DC output for reliable lock performance.
Q: Does this lock provide a door status signal for integration with an alarm or access control system?
A: Yes. The lock includes a signal feedback function that outputs the current door status (open/closed), making it easy to integrate with alarm panels, intercoms, or building access control systems.