1. Product Overview
The Securitron FSUNL-12 UnLatch Strike is a specialized module designed to provide fail-safe or fail-secure operation for door security systems. This innovative strike eliminates the need for cutting or altering the door jamb, simplifying installation. It is engineered to fit standard ANSI 4-7/8 inch strike cutouts and ensures the deadlatch function is maintained at all times.
Figure 1: Securitron FSUNL-12 UnLatch Strike module. This image shows the electronic circuit board with capacitors and relays housed within a black metal enclosure. A white label with product information is visible on the inside of the enclosure's lid.
2. Key Features
- Easy Installation: Designed for fully concealed installation without requiring cutting or altering of the door jamb.
- Standard Compatibility: Fits standard ANSI 4-7/8 inch strike cutouts.
- Deadlatch Functionality: Maintains the deadlatch function of the lockset at all times, enhancing security.
- Versatile Finishes: Also available in Polished Brass (US03) and Oil Rubbed Bronze (US10B) to match various door hardware.
- Voltage: Operates on 12V DC at 90mA.
3. Specifications
| Attribute | Detail |
|---|---|
| Model Number | FSUNL-12 |
| Product Dimensions | 9.6 x 7.1 x 3.6 inches |
| Weight | 1.64 Pounds |
| Operating Voltage | 12V DC |
| Current Draw | 90mA |
| Manufacturer | Securitron |
| First Available Date | December 31, 2009 |
4. Setup and Installation
The Securitron FSUNL-12 is designed for straightforward installation, primarily due to its ability to fit standard ANSI 4-7/8 inch strike cutouts without requiring modifications to the door jamb.
4.1. Pre-Installation Checklist
- Verify the door frame has a standard ANSI 4-7/8 inch strike cutout.
- Ensure the power supply is 12V DC and can provide at least 90mA.
- Confirm all necessary wiring (power, control signals) is available at the installation site.
- Gather required tools: screwdriver, wire strippers, multimeter (for testing).
4.2. Installation Steps
- Disconnect Power: Before beginning any electrical work, ensure all power to the door system is disconnected at the circuit breaker.
- Prepare Wiring: Route the 12V DC power wires to the strike location. Ensure proper polarity if specified by the wiring diagram (refer to the product's internal label or separate wiring diagram if provided).
- Mount the Module: Insert the FSUNL-12 module into the standard ANSI 4-7/8 inch strike cutout in the door frame. The design allows for a fully concealed installation. Secure the module using appropriate fasteners.
- Connect Wiring: Connect the 12V DC power wires to the designated terminals on the FSUNL-12 module. Double-check all connections for secure fit and correct polarity.
- Test Functionality: Restore power to the system. Test the operation of the UnLatch strike with the associated door hardware. Verify that the deadlatch function is maintained and that the strike operates correctly in both fail-safe and fail-secure modes as configured.
- Final Adjustments: Make any necessary adjustments to ensure smooth operation and proper alignment with the door's latch bolt.
Note: For detailed wiring diagrams and specific configuration instructions (fail-safe vs. fail-secure), please refer to the documentation provided with the physical product or contact Securitron technical support.
5. Operation
The Securitron FSUNL-12 UnLatch Strike operates in conjunction with a door lockset to control access. Its primary function is to allow the door to be opened when authorized, while maintaining the deadlatch function for enhanced security when locked.
5.1. Fail-Safe vs. Fail-Secure Operation
The FSUNL-12 module supports both fail-safe and fail-secure configurations. The specific mode of operation depends on how the unit is wired and configured during installation.
- Fail-Safe (Power to Lock): In this configuration, the strike will unlock when power is removed. This is typically used for emergency exits where the door must unlock during a power failure.
- Fail-Secure (Power to Unlock): In this configuration, the strike will remain locked when power is removed. This is common for secure areas where the door must remain locked during a power failure.
When power is applied (or removed, depending on configuration), the internal mechanism of the UnLatch strike retracts or extends, allowing the door's latch bolt to clear the strike opening, thus permitting the door to be opened. When the door is closed and the strike is in its locked state, the deadlatch mechanism of the lockset is fully engaged, preventing unauthorized manipulation of the latch bolt.
6. Maintenance
The Securitron FSUNL-12 UnLatch Strike is designed for minimal maintenance. Regular inspections can help ensure its long-term reliability and proper function.
6.1. Routine Checks
- Visual Inspection: Periodically inspect the strike and surrounding door frame for any signs of wear, damage, or misalignment. Ensure no debris is obstructing the strike opening.
- Functionality Test: Regularly test the strike's operation by activating the access control system. Verify that the strike unlocks and locks smoothly and that the deadlatch engages correctly.
- Wiring Integrity: If accessible, check the wiring connections for any looseness or corrosion. Ensure all wires are securely terminated.
6.2. Cleaning
Clean the visible parts of the strike with a soft, dry cloth. Avoid using abrasive cleaners or solvents, as these can damage the finish or internal components.
6.3. Lubrication
The internal mechanisms of the UnLatch strike are generally self-lubricating or designed for maintenance-free operation. Do not apply lubricants unless specifically instructed by Securitron technical support, as this could attract dust and debris, leading to malfunction.
7. Troubleshooting
This section provides guidance for common issues encountered with the Securitron FSUNL-12 UnLatch Strike. For problems not listed here, contact Securitron technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Strike does not unlock/lock | No power or incorrect voltage. Loose or incorrect wiring. Faulty control signal. Internal component failure. | Verify 12V DC power supply and connections. Check all wiring for secure connections and correct polarity. Test the control signal from the access control system. Contact technical support for further diagnosis. |
| Door binds or does not close properly | Misalignment between strike and latch bolt. Debris in strike opening. Damaged strike mechanism. | Adjust the strike or door hardware for proper alignment. Clear any obstructions from the strike opening. Inspect for physical damage; replace if necessary. |
| Deadlatch function not maintained | Improper installation or alignment. Worn or damaged deadlatch mechanism on lockset. | Re-check installation and alignment of the strike with the lockset. Inspect the lockset's deadlatch; replace lockset if faulty. |
Important: Always disconnect power before performing any inspection or maintenance on electrical components.
8. Warranty and Support
Securitron products are known for their reliability and are typically backed by a comprehensive warranty. For specific warranty terms and conditions applicable to your FSUNL-12 UnLatch Strike, please refer to the warranty card included with your product or visit the official Securitron website.
For technical assistance, product inquiries, or to report a defect, please contact Securitron customer support. Contact information can usually be found on the manufacturer's website or on the product packaging.
Manufacturer: Securitron
Website: www.securitron.com
