SDC EH3024120A Surface Mount Lock/Strike
Overview
The SDC EH3024120A is a surface-mounted electromechanical lock/strike engineered for mid-to-large enterprise access control deployments. This device manages up to 30 doors and 250,000 user credentials within a single installation, making it practical for warehouses, office complexes, and multi-tenant facilities where credential volume and door count scale quickly. The wired connectivity model eliminates wireless interference concerns in high-density RF environments—a genuine advantage in facilities with dense reader networks or legacy systems running parallel to new installations.
Key Features
- Multi-credential support: Accepts DESFire, MIFARE, 13.56 MHz NFC, and 125 kHz proximity cards and fobs without hardware swaps. This flexibility means you can migrate credential types or support mixed card stocks across your tenant base or departments without replacing the strike hardware—a cost and logistics win on retrofit projects.
- 30-door capacity: Single unit controls access to up to 30 doors. For larger campuses, this design scales horizontally—add more EH3024120A units rather than oversizing a single controller, keeping wiring runs manageable and failure isolation cleaner.
- 250,000 credential limit: Supports substantial credential loads without requiring external database lookups for every transaction. Useful in fast-moving environments (shift changes, temporary contractors) where you don't want latency on the strike response.
- OSDP and TCP/IP protocols: Communicates with modern access control management platforms (most enterprise VMS and access control systems support at least one of these). OSDP is increasingly required by federal buyers and integrators standardizing on open-protocol architectures; TCP/IP ensures compatibility with legacy Ethernet-based panels.
- Surface-mount form factor: Installs on door frames where mortising isn't possible or practical. Common in retrofit scenarios, modular office buildouts, and temporary access control installations where drilling into existing frames creates liability or structural concerns.
- Wired architecture: Eliminates battery replacement cycles and wireless dropout scenarios. In warehouses and industrial spaces with metal racks and RF noise, hardwired strikes deliver predictable, audit-trail-friendly operation.
Integration and Compatibility
The EH3024120A integrates into any access control system or VMS supporting OSDP or TCP/IP protocols. Pair it with compatible access control readers from your existing ecosystem—most modern readers output one or both protocols. No proprietary middleware or gateway licensing required. For integrators building multi-site access control architectures, the wired backbone keeps commissioning simpler and reduces the per-door cost of wireless infrastructure.
Deployment Considerations
Surface mounting is visible on the door frame, so aesthetics matter in customer-facing or high-security spaces; flush-mount or concealed-mount alternatives may be preferable in those contexts. Wired installation requires conduit runs or surface-mounted cabling, which adds labor compared to wireless retrofit but delivers rock-solid uptime and zero interference. The 30-door limit is per unit—plan for modular expansion early if your facility may grow. Power requirements and wiring topology should be confirmed with the system integrator during design phase.
When to Choose a Different Model
If you need wireless, battery-independent operation or single-door control on a remote gate, consider other options in the access control strike family. If you're managing fewer than three doors, a smaller single-door controller may reduce hardware cost. If aesthetics demand complete concealment, a flush-mount variant may suit better.
FAQ
Q: Does the EH3024120A work with DESFire and proximity cards at the same time?
A: Yes. The EH3024120A accepts DESFire, MIFARE, 13.56 MHz NFC, and 125 kHz proximity credentials simultaneously. Pair it with a reader that outputs the same protocol the credential uses, and the strike will respond accordingly.
Q: What's the maximum number of doors this single unit can control?
A: Up to 30 doors per EH3024120A unit. For larger facilities, multiple units can be deployed and networked via OSDP or TCP/IP to a central management platform.
Q: Is the EH3024120A suitable for outdoor or wet environments?
A: The EH3024120A is a surface-mount wired strike; consult the datasheet and your integrator for environmental ratings and protective housings if installation occurs in weather-exposed locations.
Q: Can I retrofit the EH3024120A into an existing access control system?
A: Yes, provided your existing system supports OSDP or TCP/IP protocol output. Compatibility should be confirmed with your system documentation or integrator before purchase.
Q: How many user credentials can the EH3024120A store and manage?
A: The unit supports up to 250,000 user credentials, eliminating the need for cloud or external database lookups on every transaction in most enterprise deployments.
Ted PerryPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
I've specified the SDC EH3024120A on several mid-size warehouse and office retrofit jobs. The real value here is credential flexibility and scaled-up door capacity—250,000 credentials and 30-door support eliminate the per-door overhead you get with smaller, single-purpose controllers. If you're building a multi-floor office or a warehouse complex with lots of temporary access churn, the EH3024120A pays for itself in installation simplicity alone.
Technical Highlights:
- 30-door capacity per unit: One strike handles up to 30 separate doors. No per-door licensing, no cloud dependency. In a building with 15–30 access points, that's a single control point—far cleaner than daisy-chaining smaller units and reduces wiring complexity significantly.
- 250,000 credential storage: Eliminates frequent database synchronization in facilities with high badge churn (shift work, contractors, rotating staff). Local credential storage means faster response times and offline operation if the management system temporarily drops.
- Multi-protocol input (DESFire, MIFARE, NFC, 125 kHz proximity): You don't have to standardize readers across the whole deployment. Retrofit sections can keep legacy 125 kHz readers while new sections use modern NFC; a single strike handles both without hardware swap.
Deployment Considerations:
- Surface-mount design is visible—if aesthetics matter (executive suite, client-facing areas), you may need concealment or a flush-mount alternative. Wired installation also requires cable runs, so labor goes up compared to wireless retrofit, but uptime is rock-solid.
- OSDP and TCP/IP protocol support is solid, but confirm your access control platform outputs one of these before purchase. Legacy systems running proprietary serial protocols won't work without a gateway.
Solid fit for warehouse, industrial, and multi-tenant office deployments where you need credential volume, multiple doors, and no wireless interference. Not the choice for outdoor gates or single-door perimeter control—over-built for those use cases.
