12V Fail Secure Electric Mortise Drop Bolt Lock with Key Cylinder
12V Fail Secure Electric Mortise Drop Bolt Lock with Key Cylinder
12VDC Fail Secure Electric Mortise Drop Bolt Lock with Key Cylinder
Upgrade your access control system with this 12VDC Electric Mortise Drop Bolt Lock from Asia-Teco (Model B9L). Built from durable aluminum alloy, this fail-secure electronic door lock keeps your door locked whenever power is off — making it the ideal choice for security-critical applications in offices, server rooms, storage facilities, and controlled-access entryways.
With its built-in key cylinder override, adjustable time delay settings (0, 3, or 6 seconds), and clear LED status indicators (green for unlocked, red for locked), this lock delivers both convenience and reliable security. CE and FCC certified. Made in Mainland China.
Key Features
- Fail Secure (NO Lock): Door remains locked when power is off — ideal for high-security access points
- Aluminum Alloy Construction: Robust and corrosion-resistant for long-lasting durability
- Adjustable Time Delay: Choose 0, 3, or 6 seconds to suit your access workflow
- LED Status Display: Green indicates unlocked; Red indicates locked — at-a-glance monitoring
- Door Status Signal Output: Integrates seamlessly with access control panels and alarm systems
- Key Cylinder Override: Manual key access for emergency or backup entry
- Wide Operating Temperature Range: Functions reliably from -10°C to +55°C
- CE & FCC Certified: Meets international safety and electromagnetic compatibility standards
Technical Specifications
| Brand | Asia-Teco |
| Model | B9L |
| Material | Aluminum Alloy |
| Working Type | Fail Secure (Power Off = Locked) |
| Operating Voltage | DC 12V |
| Working Current | 80 mA |
| Start Current | 1300 mA |
| Time Delay | 0 / 3 / 6 Seconds (selectable) |
| LED Indicator | Green = Unlock / Red = Lock |
| Signal Output | Door status contact output |
| Operating Temperature | -10°C to +55°C |
| Certification | CE, FCC |
| Country of Origin | Made in Mainland China |
Why Choose a Fail Secure Lock?
A fail secure lock (also called a "normally open" or NO lock) remains in the locked state during a power outage. This is the preferred configuration for high-security areas where unauthorized access must be prevented even during emergencies. For guidance on best practices for electronic access control and building security, refer to the U.S. Consumer Product Safety Commission (CPSC).
Frequently Asked Questions
Q: What does "fail secure" mean for this electric mortise drop bolt lock?
A: Fail secure means the lock defaults to the locked position whenever power is interrupted. Unlike fail-safe locks that open during a power failure, this model keeps the door securely locked, which is essential for server rooms, vaults, and other high-security access points.
Q: Can this electric drop bolt lock be used with an access control system?
A: Yes. The Asia-Teco B9L includes a door status signal output contact, allowing it to integrate with most standard access control panels, keypads, card readers, and alarm systems. Simply wire the signal output to your controller for full monitoring capability.
Q: How does the adjustable time delay work on this electronic door lock?
A: The time delay setting determines how long the lock remains unlocked after a valid access signal is sent. You can select 0, 3, or 6 seconds depending on how much time you need for the door to be opened before it automatically re-locks — helpful for high-traffic or ADA-compliant access points.
Q: Does this lock include a manual override option?
A: Yes. The built-in key cylinder allows authorized personnel to manually lock or unlock the door independently of the electronic system — providing a reliable backup entry method in case of power or system failure.