SDC LR100FAK Electric Latch Retraction Controller
Overview
The SDC LR100FAK is a dedicated latch retraction controller purpose-built for mid-to-large multi-door access control systems. It manages electric latch release across up to 63 doors simultaneously and supports 250,000 user credentials, making it suitable for campus-wide, multi-building, and enterprise deployments where credential volume and door count scale beyond single-reader installations. The LR100FAK communicates via OSDP (Open Supervised Device Protocol) and TCP/IP, enabling integration into modern access control platforms without proprietary middleware or gateway hardware.
Key Features
- Multi-Door Capacity (63 Doors): Eliminates the need for separate controllers per entrance or floor, reducing system complexity and cost. A single LR100FAK can handle a mid-size office building or warehouse with multiple access points, keeping wiring and power distribution simpler than distributed per-door controllers.
- Credential Support (DESFire, MIFARE, NFC 13.56 MHz, 125 kHz Prox): Works with both high-frequency smart cards and legacy proximity badges, so you don't have to replace existing reader infrastructure immediately. Mixed-credential environments are fully supported, letting you migrate or support contractors and vendors on different card types within the same system.
- 250,000 User Records: Handles large workforce rosters without external database strain. Useful for enterprises managing employees, contractors, and temporary access across distributed locations—each credential can be linked to specific door schedules and access levels without additional licensing or seat charges.
- OSDP Protocol Support: Vendor-neutral, encrypted communication standard eliminates lockdown to proprietary platforms. OSDP also enables real-time tamper alerts, reader diagnostics, and secure credential updates over the network—features that older Wiegand-only controllers cannot deliver.
- TCP/IP Connectivity: Integrates into existing IP networks without specialized serial infrastructure. Enables remote management, audit logging, and firmware updates over standard Ethernet, reducing on-site engineering overhead.
- Wired Controller Architecture: Designed for permanent installation in secured equipment rooms or cabinet-mounted deployments, not field-mounted readers. Provides centralized latch logic and credential validation, keeping sensitive control away from public access points.
Integration and Compatibility
The LR100FAK is part of the broader SDC access control ecosystem and integrates with access control platforms that support OSDP and TCP/IP protocols. It pairs with compatible reader hardware (SDC and third-party models) that output OSDP credentials. No proprietary software subscription is required for basic door-release operations; credential assignment and scheduling are handled by your chosen access control management platform.
For deployment in multi-door access control systems, confirm that your readers are OSDP-compatible or support credential conversion to OSDP format. If migrating from Wiegand-only systems, budget for reader replacement or Wiegand-to-OSDP gateway hardware.
Deployment Considerations
The LR100FAK is a controller, not a reader. It must be paired with compatible card readers positioned at each door. Power requirements for the latch solenoids themselves (typically 12 VDC, 500 mA–1 A per door) must be supplied by external power distribution or UPS; the controller does not provide latch power internally. Plan cabling runs from the controller enclosure to each door's strike plate and reader, accounting for conduit, voltage drop, and failsafe behavior (normally-locked vs. normally-open on power loss) per your security policy.
Credential capacity (250,000 records) is sufficient for large single-site or multi-site operations, but verify your access control platform's database synchronization speed if you anticipate frequent adds/removals (e.g., high-turnover warehouse or retail).
Frequently Asked Questions
Q: Does the LR100FAK work with existing Wiegand readers?
A: Not directly. The LR100FAK requires OSDP-compliant readers or gateways that convert Wiegand output to OSDP format. If you have legacy Wiegand readers, you will need to upgrade to OSDP readers or install Wiegand-to-OSDP converter hardware.
Q: What happens if power is lost to the LR100FAK?
A: The controller itself powers down, but latch behavior depends on your solenoid configuration (fail-safe or fail-secure). A failsafe strike releases on power loss; a fail-secure strike locks. Consult your integrator to confirm the correct mode for your facility and ensure backup power (UPS) is in place if access must remain available during outages.
Q: Can I manage the LR100FAK remotely?
A: Yes, TCP/IP connectivity allows remote credential assignment, schedule changes, and audit log retrieval through your access control management platform, provided the controller has network connectivity and the platform supports remote administration.
Q: How many readers can connect to one LR100FAK?
A: The controller supports up to 63 doors (latch outputs); the number of readers depends on your OSDP network topology. Consult the system architecture with your access control integrator to confirm reader density and network bandwidth requirements.
Q: Is the LR100FAK NDAA-compliant or manufactured outside China?
A: No NDAA or country-of-origin certification is listed in the product documentation. If NDAA compliance or domestic sourcing is a hard requirement, confirm with the manufacturer or your procurement team before proceeding.
Q: What credentials can the LR100FAK store and validate?
A: The controller supports DESFire, MIFARE, NFC (13.56 MHz), and 125 kHz Prox formats, supporting up to 250,000 unique credential records across all formats mixed together.
Ted PerryPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The LR100FAK solves a real scaling problem: multi-door installations without protocol overhead. Most small-to-medium access control systems rely on per-reader logic or distributed controllers, which means you're pulling Ethernet and power to every reader cabinet. The LR100FAK consolidates latch release logic for up to 63 doors into a single enclosure-mounted controller, and the use of OSDP as the communication backbone means you're not locked into proprietary gateway hardware or subscription licensing.
Technical Highlights:
- 63-Door Capacity: One controller handles a mid-size building or warehouse floor, reducing cable runs, power distribution complexity, and single-points-of-failure compared to 63 independent per-door controllers.
- OSDP + TCP/IP Dual Protocol: OSDP is encrypted, vendor-neutral, and supports real-time reader diagnostics and tamper alerts—things Wiegand cannot do. TCP/IP means firmware updates and credential provisioning happen over your existing network without serial port gear or sneaker-net USB drives.
- 250,000 Credential Slots: Scales from small office to enterprise workforce. No per-credential licensing or seat charges; the capacity is built in, making it cost-efficient for high-turnover or contractor-heavy environments.
- Mixed Credential Support (DESFire, MIFARE, NFC, 125 kHz Prox): Eliminates the need to standardize on one card format across the organization. Legacy proximity badges work alongside modern NFC smartphones in the same door reader, simplifying phased upgrades.
Deployment Considerations:
- OSDP Readers Required: If your site runs Wiegand-only readers, the LR100FAK will not plug-and-play. Budget for reader replacement or Wiegand-to-OSDP gateway hardware. This is a hard migration point; confirm reader inventory and upgrade path before committing.
- Power Design for Solenoid Circuits: The controller itself is low-power, but the door strike solenoids (typically 12 VDC @ 500 mA–1 A per door) are your own responsibility. Plan a dedicated 12 VDC power distribution for all 63 potential strikes, account for voltage drop over long runs, and ensure failsafe/fail-secure behavior aligns with your security policy. A dead power supply to the latch circuits defeats the whole system.
- Wiring Distance and Conduit: 63 doors mean potentially long cable runs from the controller to each strike. Verify voltage drop calculations and use properly gauge cabling to avoid solenoid chatter or dropout on the far end of the run.
The LR100FAK is the right choice for enterprise or campus environments with 20+ doors where you want centralized credential logic, vendor-neutral protocol, and the ability to retire proprietary gateways. It is overkill for single-door or two-door installations, and it requires OSDP readers—if you're locked into legacy Wiegand infrastructure, this is a longer-term upgrade path, not a plug-and-play swap.
