Electric Drop Bolt Mortise Lock Fail Safe/Secure NC/NO | Asia-Teco B7L

Asia-Teco Electric Drop Bolt Mortise Door Lock (Model B7L)

Upgrade your access control system with the Asia-Teco B7L Electric Drop Bolt Mortise Lock — a versatile, heavy-duty electronic lock engineered for glass, wooden, metal, and frame doors. With selectable Fail Safe (NC) and Fail Secure (NO) modes, adjustable time delay, and a built-in feedback signal, this smart lock delivers reliable, customizable security for offices, commercial spaces, and residential entryways.

Made in Mainland China.

Key Features

• Dual Working Modes: Choose between Fail Safe (NC — unlocks on power loss) or Fail Secure (NO — remains locked on power loss) to match your safety requirements.
• Built-in Feedback Signal: Real-time door status feedback integrates seamlessly with access control panels and monitoring systems.
• Adjustable Time Delay: Select 0, 3, or 6 seconds of delay for smooth, controlled door operation.
• Durable Aluminium Alloy Construction: Lightweight yet rugged housing stands up to continuous daily use.
• Broad Door Compatibility: Designed for glass, wooden, metal, and security/frame doors — ideal for offices, server rooms, retail stores, and more.
• Magnetic Induction Lock Mode: Smooth, silent operation with continuous-work winding type for always-on reliability.
• Low Working Current: Efficient power draw (0.14A in working state) keeps operating costs low.
• Compact Profile: 200 × 28 × 38 mm form factor fits neatly into most standard door frames without bulky hardware.

Technical Specifications

Why Choose the Asia-Teco B7L?

Whether you're building a complete access control system for a commercial facility or securing a single office door, the B7L offers professional-grade performance at an accessible price. The selectable NC/NO modes mean you can configure the lock to suit your specific fire-safety and security protocols. The feedback signal wire keeps your control panel informed of door status at all times — a feature typically found only in enterprise-level hardware.

For more information on electronic access control and building security standards, visit the U.S. Consumer Product Safety Commission (CPSC) for guidance on safe installation of electrical hardware in your home or business.

Frequently Asked Questions

Q: What is the difference between Fail Safe (NC) and Fail Secure (NO) mode on this electric drop bolt lock?

A: In Fail Safe (NC) mode, the door automatically unlocks when power is cut — ideal for fire-exit doors that must allow free egress in an emergency. In Fail Secure (NO) mode, the door remains locked when power is lost — best for high-security areas where the door must stay secured even during a power outage. The Asia-Teco B7L lets you choose whichever mode fits your application.

Q: Is this electric mortise lock compatible with my existing access control system?

A: Yes. The B7L operates on standard DC 12V and features a feedback signal output, making it compatible with most access control panels, card readers, keypads, and intercoms that support NC/NO electric locks. Always verify your controller's voltage and current specifications before installation.

Q: What door types does the Asia-Teco B7L electric drop bolt lock support?

A: The B7L is specifically designed for glass doors, wooden doors, metal doors, and frame/security doors. Its compact 200 × 28 × 38 mm aluminium alloy body fits a wide range of door frames, making it a versatile choice for offices, retail entrances, server rooms, and residential doors.

Q: How do I adjust the time delay on this electric door lock?

A: The time delay can be set to 0, 3, or 6 seconds using the onboard adjustment. This controls how long after an unlock signal is received before the bolt retracts, giving you control over door-open timing to suit traffic flow and security needs.