Descrizione
A Door Is Only as Strong as the Judgment of the Mechanism That Keeps It Closed.
Security is a negotiation between physics and intent. A lock that opens when the power fails has already surrendered to the first person who finds the breaker box. A lock that will not open at all when the power fails has trapped its occupants inside a fire. The Sentinel Bolt is an electromagnetic mortise deadbolt engineered for the narrow band between these two failures — a 12VDC alloy mechanism that defaults to locked when unpowered (fail-secure), can be manually overridden with a physical key cylinder in any state, and includes a configurable time-delay relay that turns opportunistic tampering into a waiting game the intruder cannot win.
The core of the Sentinel Bolt is a zinc-alloy mortise body housing a 12-volt DC solenoid actuator driving a hardened steel deadbolt. When energized, the solenoid retracts the bolt. When de-energized — whether by intentional signal, power loss, or wire cut — the bolt extends and holds. This is the fail-secure philosophy: the door's default state is locked, and only an authenticated signal changes that. In access control systems, this means a severed cable does not create an open door. In server rooms and equipment enclosures, it means the hardware stays protected through a blackout. The integrated key cylinder provides a mechanical bypass that works when the electronics cannot — a detail that separates professional-grade security hardware from consumer smart locks.
The time-delay relay — configurable from 0 to 30 seconds — adds a layer of psychological deterrence. When an authenticated signal arrives, the lock waits. The door stays closed. An authorized user holding a fob or keypad code simply pauses for the programmed interval. An unauthorized user who has cloned a signal now faces an unexplained delay — and uncertainty is the enemy of intrusion. In commercial installations, this feature is often paired with a local audible alert, turning the delay window into a verification period for security personnel.
Security is not the absence of vulnerability. It is the deliberate management of what happens when the unexpected arrives.
Key Features
- ✦ Fail-Secure Electromagnetic Architecture — Bolt extends and locks when de-energized; a severed cable, power outage, or fire alarm does not create an open door
- ✦ Integrated Mechanical Key Cylinder — Physical key override operates independently of the electronic system; no software, no voltage, no authentication server required
- ✦ Configurable Time-Delay Relay (0–30s) — Programmable delay between signal receipt and bolt retraction; turns cloned-credential attacks into conspicuous waiting periods
- ✦ Zinc-Alloy Mortise Body — Die-cast housing with corrosion-resistant finish rated for indoor and sheltered outdoor installation; resists prying, drilling, and impact
- ✦ 12VDC Low-Voltage Operation — Compatible with standard access control power supplies, backup battery circuits, and PoE-to-12V converters; draws under 300mA at holding state
- ✦ NO/NC Dry Contact Monitoring — Built-in door position sensor outputs normally-open and normally-closed signals for integration with alarm panels, PLCs, and building management systems
- ✦ Hardened Steel Deadbolt — 14mm throw with anti-saw insert; exceeds EN 12209 durability rating for 200,000+ cycles
Technical Specifications
- Operating Voltage: 12V DC (±10%)
- Current Draw: 280mA (Actuation) / 80mA (Holding)
- Lock Type: Fail-Secure (Locked When De-Energized)
- Bolt Material: Hardened Steel with Anti-Saw Insert
- Bolt Throw: 14 mm
- Housing Material: Die-Cast Zinc Alloy
- Time Delay Range: 0–30 seconds (Adjustable)
- Monitoring Output: NO/NC Dry Contact (Door Position Sensor)
- Durability Rating: 200,000+ Cycles (EN 12209 Equivalent)
- Key Override: Euro Profile Cylinder (Included, 3 Keys)
Application Scenarios
The Sentinel Bolt is deployed wherever the cost of an unlocked door exceeds the cost of the lock itself — a calculation that applies to far more environments than most security audits acknowledge. In server rooms and data centers, the fail-secure default means that a fire-alarm-triggered power cut does not leave racks of equipment physically accessible — the bolt stays thrown, and only the mechanical key cylinder or a UPS-backed access controller can retract it. In pharmaceutical storage and cannabis grow facilities, the time-delay relay is paired with dual-authentication readers to create a two-stage entry process that satisfies regulatory chain-of-custody requirements. In multi-tenant commercial buildings, the Sentinel Bolt integrates with intercom and video entry systems to control common-area access doors, and the NO/NC monitoring output feeds door-ajar alerts to the building management dashboard. The zinc-alloy body and corrosion-resistant internals also make it suitable for sheltered outdoor gates and perimeter doors in temperate climates, where cheaper electromagnetic shear locks would seize after a single winter of condensation.
Frequently Asked Questions
Q: What happens if the power fails?
A: The Sentinel Bolt is fail-secure — when power is lost, the deadbolt remains extended and the door stays locked. Entry is still possible via the mechanical key cylinder (three keys included). If your access control system needs to remain operational during outages, connect the lock to a UPS-backed 12V power supply. The lock draws only 80mA in holding state, so even a modest UPS can maintain dozens of doors for hours.
Q: Can this lock be used outdoors?
A: The Sentinel Bolt is rated for sheltered outdoor installation — under an awning, in a recessed gate post, or within a weatherproof enclosure. Direct exposure to driving rain or standing water is not recommended. For fully exposed outdoor gates, consider our IP65-rated electromagnetic gate lock series.
Q: How does the time-delay relay work in practice?
A: There is a small potentiometer on the lock body that sets the delay (0–30 seconds). When a valid access signal is received, the lock waits for the set duration before retracting. During the delay, the bolt remains extended and the door cannot be opened. This feature is typically used in high-security environments where a guard or monitoring system verifies the entry attempt during the delay window. To disable the delay, set the potentiometer to zero.
Q: Is this compatible with my access control system?
A: The Sentinel Bolt accepts a standard 12VDC trigger signal from any access controller, keypad, RFID reader, or intercom system with a relay output. The NO/NC monitoring contacts provide door-position feedback that most access control panels (HID, Paxton, Rosslare, etc.) can read as a standard input. No proprietary communication protocol or software is required — it is a pure electromechanical device.
Q: What is the difference between fail-secure and fail-safe?
A: Fail-secure (this lock) stays LOCKED when power is lost — appropriate for server rooms, storage areas, and perimeter doors where security is the priority. Fail-safe unlocks when power is lost — required by fire code for emergency egress doors so occupants can exit during a power failure. Always check local building and fire codes before specifying lock type for any door on an egress path.
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