Fail Secure Silent Motor Mortise Lock | Electric Bolt Access Control
Fail Secure Silent Motor Mortise Lock | Electric Bolt Access Control
Asia-Teco Silent Motor Mortise Lock – Fail Secure Electric Bolt Style
Upgrade your door access control system with the Asia-Teco B12L Motor Mortise Lock. Designed to look like a classic electric bolt lock but powered by a precision clutch motor, this fail-secure lock offers whisper-quiet operation, intelligent tongue detection, and ultra-low power consumption — making it ideal for offices, server rooms, apartments, and commercial access control installations.
Key Features
- Fail Secure (Power-On Unlock): The lock remains locked when power is off and unlocks only when power is applied — keeping your space secure during outages.
- Silent Operation: Clutch motor drive ensures near-silent locking and unlocking cycles, ideal for quiet environments.
- Door Status Feedback: Built-in magnetic door contact provides NO/COM signal output so your access control panel always knows whether the door is open or closed.
- Adjustable Trigger Logic: High-level or low-level trigger and door status sensor enable/disable are easily configured via a DIP code switch — no rewiring required.
- Intelligent Tongue Detection: Automatically senses lock tongue status to prevent false lock confirmation and protect the mechanism.
- Ultra-Low Power Consumption: Operating current under 0.3A at DC 12V or 24V keeps energy costs minimal.
- Exceptional Durability: Engineered and tested for over 200,000 operation cycles, ensuring years of reliable service.
- Optional Oblique Tongue Locator: Makes alignment and installation smoother, especially on doors with minor frame gaps.
- Aluminium Alloy Construction: Lightweight yet sturdy housing built for long-term commercial or residential use.
Specifications
| Brand | Asia-Teco |
| Model | B12L |
| Lock Type | Fail Secure – Power-On Unlock (Power-Off Locked) |
| Material | Aluminium Alloy |
| Lock Body Size | L200 × W28 × H50.5 mm |
| Inbuilt Size | L145 × W26.5 × H48 mm |
| Lock Tongue Protrusion | Length 21 mm × Width 30 mm |
| Working Voltage | DC 12V / 24V |
| Working Current | < 0.3A |
| Door Contact Output | NO / COM |
| Cycle Life Rating | 200,000+ operations |
| Country of Origin | Made in China |
What's in the Box?
- 1 × Asia-Teco B12L Motor Mortise Lock
- Mounting hardware
- User manual
Learn More About Access Control Standards
For guidance on physical security and access control best practices, visit the U.S. Consumer Product Safety Commission (CPSC) for safety standards on electronic hardware and devices.
Frequently Asked Questions
Q: What does "fail secure" mean for this motor mortise lock?
A: A fail secure lock stays locked when power is cut. Power must be actively applied to retract the bolt and allow entry. This is ideal for security-sensitive areas where you want doors to default to a locked state during a power failure.
Q: Is this lock compatible with standard access control systems?
A: Yes. The Asia-Teco B12L operates on DC 12V or 24V and features adjustable high-level/low-level trigger logic via DIP switch, making it compatible with most standard access control panels, keypads, card readers, and intercoms.
Q: How noisy is the lock during operation?
A: This lock is specifically engineered for silent or near-silent operation using a precision clutch motor. It is well-suited for libraries, offices, hotel corridors, and other quiet environments where a loud solenoid click would be disruptive.
Q: How do I configure the door status sensor?
A: The door status sensor (enable/disable) and trigger level (high/low) are both configurable by adjusting the on-board DIP code switch — no soldering or wiring changes needed. Refer to the included user manual for switch position diagrams.
Q: What type of doors is this lock suitable for?
A: The B12L is designed for inward or outward opening single doors — commonly used on office doors, apartment entry doors, server room doors, and interior security doors. The optional oblique tongue locator helps with alignment on doors that have slight frame misalignment.