DC 12V Fail Secure Electric Drop Bolt Lock – Time Relay & Key

Asia-Teco DC 12V Fail Secure Electric Cylinder Drop Bolt Lock

Upgrade your access control system with the Asia-Teco B9L Fail Secure Electric Cylinder Drop Bolt Lock. Engineered for reliability and versatility, this DC 12V electric lock is designed to keep doors securely latched when power is off (Normally Open / Fail Secure), making it ideal for security-critical applications in offices, apartment buildings, warehouses, and controlled-access areas.

Key Features

• Fail Secure Operation: Door automatically locks when power is cut — ideal for safety and security installations where a locked state on power loss is required.
• Adjustable Time Delay Relay: Built-in time relay with selectable delay settings of 0, 3, or 6 seconds, giving you full control over door re-locking timing.
• Bevel Bolt & Mechanical Key Override: Stainless steel locking tongue (12.5mm diameter, 15mm ± 1mm pop-up length) with a bevel bolt for smooth door closure, plus a mechanical key for manual override in any situation.
• LED Status Indicators: Green LED indicates unlocked status; Red LED indicates locked status — at-a-glance monitoring for installers and security personnel.
• Door Status Signal Output: Built-in door contact signal output allows integration with access control panels, alarm systems, or building management systems.
• 6-Cable Wiring: Comprehensive 6-cable harness for straightforward integration: Red (+) Positive, Black (–) Negative, plus additional cables for relay and door contact output.
• Durable Aluminum Alloy Construction: Lightweight yet robust housing built to withstand daily use across a wide operating temperature range of -10°C to +55°C.
• CE & FCC Certified: Meets international electromagnetic and safety compliance standards.

Technical Specifications

What's in the Box?

• 1 × Asia-Teco B9L Electric Cylinder Drop Bolt Lock
• Mechanical key override
• 6-cable wiring harness
• Mounting hardware

Ideal Applications

• Office and commercial building access control
• Apartment and residential entry doors
• Server rooms and restricted-access areas
• Integration with keypads, card readers, and intercom systems

For guidance on best practices in electronic access control and building security, visit the U.S. Consumer Product Safety Commission (CPSC) for product safety information.

Frequently Asked Questions

Q: What does "Fail Secure" mean for this electric drop bolt lock?

A: Fail Secure (also called Normally Open or NO) means the door remains locked when power is off. The bolt only retracts and allows entry when power is applied. This is the preferred configuration for security-sensitive doors where you want the door to default to a locked state during a power outage.

Q: Can I adjust the time delay on this electric bolt lock?

A: Yes. The Asia-Teco B9L features a built-in adjustable time relay with three selectable settings: 0, 3, or 6 seconds. This controls how long the bolt remains retracted (unlocked) after an access signal is triggered, giving you precise control over door re-locking timing.

Q: Does this lock work with standard access control systems?

A: Yes. The lock operates on DC 12V, which is the standard voltage used by most access control panels, keypads, card readers, and intercom systems. The 6-cable harness and door status signal output contact make integration straightforward with a wide range of commercial and residential access control setups.

Q: Is there a mechanical key override in case of system failure?

A: Yes. The B9L includes a mechanical key override, allowing authorized personnel to manually lock or unlock the door independently of the electronic system — providing a reliable backup option during maintenance or emergencies.