DC 12V Fail Secure Electric Mortise Drop Bolt Lock & Key
DC 12V Fail Secure Electric Mortise Drop Bolt Lock & Key
DC 12V Fail Secure Electric Mortise Drop Bolt Lock — Built for Reliable Access Control
Upgrade your door security with the Electric Mortise Drop Bolt Lock (Model XM-500A/XM-500B) — a heavy-duty, fail-secure access control lock engineered for offices, wooden doors, metal doors, glass doors, and PVC doors. Featuring a solid 304 stainless steel lock core capable of withstanding up to 1,000 kg of impact, this lock offers professional-grade durability rated for 500,000 operation cycles.
With its built-in adjustable time delay (0, 3, 6, or 9 seconds), LED status indicators, and door-status signal output, it integrates seamlessly into virtually any access control system — all at a practical DC 12V operating voltage.
Made in Mainland China.
Key Features
- Fail Secure Operation: Locks automatically when power is cut off (Normally Open — NO), keeping your premises secure during outages.
- Mechanical Key Override: Includes a physical key for manual access when needed.
- 304 Stainless Steel Core: Solid lock core (16 mm protrusion × 13 mm diameter) resists up to 1,000 kg of force.
- Adjustable Time Delay: Choose 0, 3, 6, or 9 seconds to suit your workflow.
- LED Status Display: Red light = locked; Green light = unlocked — instant visual confirmation.
- Door Status Signal Output: NO, NC, and COM contacts for integration with monitoring systems.
- Magnetic Induction Sensing: Detects door gap up to 8 mm for accurate status reporting.
- Brushed Stainless Steel Panel: Modern finish resists corrosion and daily wear.
- Broad Door Compatibility: Fits wooden, metal, and PVC doors.
- Wide Operating Range: Works in temperatures from -10°C to +55°C (14°F to 131°F) and humidity from 0–90% RH.
Technical Specifications
| Model | XM-500A / XM-500B |
| Working Voltage | DC 12V ±10% (24VDC available on request) |
| Starting Current | 960 mA |
| Working Current | 180 mA |
| Lock Core Size | 16 mm protrusion length × 13 mm diameter |
| Lock Core Strength | Withstands up to 1,000 kg impact |
| Time Delay Options | 0 s, 3 s, 6 s, 9 s (adjustable) |
| Door Gap Sensing | Up to 8 mm magnetic induction |
| Panel Material | 304 Stainless Steel (brushed finish) |
| Operating Temperature | -10°C to +55°C (14°F to 131°F) |
| Operating Humidity | 0–90% RH |
| Rated Durability | 500,000 operation cycles |
| Compatible Door Types | Wooden, Metal, PVC |
| Origin | Made in Mainland China |
What's in the Box?
- 1 × Electric Mortise Drop Bolt Lock (XM-500A or XM-500B)
- Mechanical key(s) for manual override
- Mounting hardware
Why Choose This Lock?
Whether you're securing an office entry, a server room, or a residential gate, this fail-secure electric drop bolt lock delivers the reliability and integration flexibility modern access control demands. The combination of a robust stainless steel build, adjustable delay timing, visual LED feedback, and dry-contact signal output makes it a versatile choice for both standalone and networked security setups.
For general guidance on door hardware security standards, visit 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 that when power is cut off, the lock remains in the locked (secured) position. This is the opposite of fail safe (which unlocks on power loss). For security-sensitive areas like offices or server rooms, fail secure ensures your door stays locked during a power outage.
Q: Is this electric drop bolt lock compatible with my existing access control system?
A: Yes. The lock operates at DC 12V (with 24VDC available on request) and provides NO, NC, and COM dry-contact signal outputs, making it compatible with most standard access control panels, keypads, card readers, and intercoms.
Q: Can I open the door manually if the power goes out?
A: Yes. The lock includes a mechanical key override, allowing authorized personnel to unlock the door manually regardless of power status.
Q: What door types are compatible with this mortise lock?
A: This lock is designed for wooden doors, metal doors, and PVC doors. Its magnetic induction sensing works with a door gap of up to 8 mm.
Q: How durable is the lock core?
A: The lock core is made from solid 304 stainless steel and is engineered to withstand up to 1,000 kg of impact force. The entire unit is rated for 500,000 operation cycles, ensuring long-term reliability in high-traffic environments.