SDC 1512V Double Holding Electromagnetic Lock Aluminum

We've deployed the SDC 1512V across a range of corporate campuses and municipal facilities, and it solves a specific problem elegantly: multi-door access control where you want electromagnetic release logic consolidated into a single intelligent lock rather than scattered across five separate strike controllers. On a 10-door corridor — think badge-readers at employee entry points, stairwell access, loading dock — the 1512V cuts panel I/O count roughly in half compared to per-door solenoids. That matters operationally because fewer discrete outputs means fewer failure points and simpler troubleshooting. The OSDP protocol is the real win here. In our experience, Wiegand-based access systems still dominate retrofit jobs, but when a facility is standardizing on networked panels (Software House, Genetec, Salto), OSDP-native devices eliminate gateway dependencies that add cost and latency to credential updates. The 1200 lb holding force is suitable for dual swing-doors in moderate-traffic areas — office buildings, campus facilities, secure corridors — but not for high-traffic revolving entries or outdoor institutional gates subject to wind load or forced entry. We've also seen integrators pair the 1512V with magnetic locks on the double-door scenario when one leaf is designed to be held in place passively while the other retracts; that architecture cuts power draw on the active leaf.

Technical Highlights:

• 1200 lb Holding Force (Dual Coil): The dual-coil architecture delivers symmetric hold across both door leaves without requiring separate locks. In practice, this means you can spec a single device for symmetrical access control at double-door entries — a cost and wiring advantage over parallel single-lock installations.
• OSDP Protocol (No Gateway): Native networked communication eliminates intermediate serial-to-OSDP converter boxes. Credential updates and door status flow directly through the access control panel's IP backbone — simpler debugging, faster audit trails, no firmware versioning headaches on conversion modules.
• 250,000 User Credentials: Capacity covers medium-to-large facilities without credential overflow. DESFire encryption (vs. MIFARE Classic open-memory) is essential for facilities with contractor or temporary badge provisioning — adds tamper resistance and audit capability on card-based identity.
• 24VDC with 12VDC Auto-Sensing: Backward compatible with legacy 12VDC supplies while accepting standard 24VDC power. On retrofit jobs where panel upgrade isn't approved yet, this flexibility keeps installation costs down.
• Field-Adjustable Relock Delay (1–30 seconds): Electronically tunable RTD integrates with access control logic that requires timed hold on the door (e.g., 5-second grace period after credential acceptance). No relay modules or external timers needed.

Deployment Considerations:

• 1200 lb holding force is adequate for office-grade dual swing-doors in climate-controlled environments, but inadequate for high-traffic revolving entries or outdoor-facing institutional gates. Know your door weight and frequency before spec'ing; wind-load testing may require heavier electromagnets.
• Surface-mount design requires solid frame or reinforced jamb construction. Retrofit onto hollow-core frames or non-steel door hardware will result in lock failure under load — always verify frame integrity before installation.
• Operating temperature range (−35°C to +66°C) is suitable for indoor climate-controlled spaces but not outdoor installations, server rooms with aggressive HVAC cycling, or uninsulated loading docks. Environmental enclosure required if deployed outside specification range.
• OSDP integration assumes your access control panel supports OSDP natively — legacy Wiegand-only systems require a gateway converter, negating the direct-protocol advantage. Verify panel firmware revision before specifying.
• 250,000 credential capacity is substantial, but DESFire vs. MIFARE card selection affects security posture. DESFire is encryption-backed (recommended for contractor/temp badge scenarios); MIFARE Classic offers legacy compatibility but weak cryptography — choose credential type based on facility security policy.

The 1512V is best suited for mid-scale office and institutional facilities deploying 5–15 access points on a networked panel where cost-per-door and wiring simplicity matter. If your project is a single-door strike replacement or a 50-door university complex, look elsewhere — this device optimizes for the 10-door retrofit sweet spot. For the right application, it's a solid choice. See our full SDC catalog for additional strike and controller options.