SDC 350V Electromagnetic Strike Lock 24VDC

SDC 350V Electromagnetic Strike Lock

Overview

The SDC 350V is a single narrow line electromagnetic strike designed for door access control integration. Operating at 24VDC, this wired lock delivers standardized credential-based access across multiple reader technologies and protocols. The 350V is sized for small to medium deployments where electromagnetic strike hardware must integrate cleanly with existing access control infrastructure without requiring custom fabrication or oversized mounting frames.

Key Features

• 24VDC Electromagnetic Strike: Standard voltage eliminates the need for specialized power conditioning—most access control panels and power supplies already output 24VDC, so wiring is straightforward and parts are readily available. Narrow form factor fits standard door frame preparation.
• OSDP Protocol Support: OSDP (Open Supervised Device Protocol) enables two-way communication between the 350V and your access control controller, allowing real-time door status feedback and remote configuration changes without polling delays.
• Multi-Credential Reader Compatibility: Works with proximity readers (125kHz), NFC (13.56MHz), DESFire, and MIFARE—you're not locked into a single card type. This flexibility matters when integrating with existing badge infrastructure or migrating to newer credential formats without replacing the strike itself.
• Keypad Input Support: Accepts both card readers and numeric keypads on the same circuit, allowing hybrid deployments where some access points use badges and others use PIN codes.
• 250,000 User Credential Capacity: Maximum 250,000 credentials across up to 10 controlled doors. For large enterprises, this means a single 350V installation can manage access across an entire warehouse section or office suite without requiring segregated controllers per door.
• Door Capacity: 10 Doors: The 350V's control logic can manage up to 10 separate doorways, reducing panel clutter and simplifying wiring when securing multiple adjacent access points (e.g., a suite of server rooms or secure storage corridors).

Integration & Compatibility

The 350V integrates with door control infrastructure that supports electromagnetic strike technology. Its wired 24VDC design means installation requires low-voltage cabling run through conduit to the strike and back to the access panel—no wireless complications, no battery replacement cycles. OSDP support ensures compatibility with modern access control systems from major vendors. Credential capacity (250,000 users across 10 doors) scales adequately for warehouse, retail, and light industrial deployments; enterprise multi-site environments should verify total credential pooling requirements before finalizing hardware counts.

For deployments requiring networked access control with IP-based readers and cloud integration, pair the 350V with an IP-enabled access controller. For traditional hardwired panels, the strike's wired input/output connections attach directly to relay outputs on your existing system without intermediary conversion hardware.

When to Choose a Different Model

If you need proportionally higher credential capacity (500,000+ users) or significantly more doors (15+), consult the broader SDC access control line for models with expanded capacity. If your application requires fail-secure (locked when power lost) rather than fail-safe (unlocked when power lost), verify the 350V's energization logic with your installer before commissioning. For high-traffic applications where strike response time is critical (sub-100ms latency), benchmark the 350V's de-energization speed against your specific reader technology and panel firmware.

Typical Deployment Scenarios

Warehouse secure zones (tool cages, hazmat storage, finished goods lockup), retail stock rooms, office suite entry points, small server room clusters, and light industrial material control areas where access must be logged and revoked remotely. The 350V's narrow profile and standard 24VDC power make retrofit installations into existing door frames feasible without structural modification.

Frequently Asked Questions

Q: What happens if power to the SDC 350V is lost?

A: The strike de-energizes and enters a fail-safe state (unlocked). For fail-secure operation (remain locked on power loss), a secondary manual bolt or door closer mechanism is required on the door itself.

Q: Can I upgrade the SDC 350V to support more doors or credentials later?

A: Credential expansion requires firmware updates or replacement of the strike's control logic. Door expansion (beyond 10) requires a separate strike unit or controller upgrade. Consult an integrator for your specific growth scenario.

Q: Is the SDC 350V compatible with mobile credential (smartphone) readers?

A: The 350V supports DESFire and MIFARE credentials, which can be provisioned on NFC-enabled smartphones. Compatibility depends on your reader hardware and mobile credential backend service.

Q: Does the SDC 350V work with existing Honeywell or Salto access panels?

A: OSDP protocol support enables integration with systems that expose OSDP reader or output control interfaces. Direct compatibility varies by panel model and firmware version. Verify with your integrator before purchasing.

Q: What is the typical installation time for the SDC 350V?

A: Physical strike installation (cutting frame mortise, wiring) typically 1–2 hours. Commissioning (credential provisioning, reader pairing, access rules) depends on your controller and number of users.

Q: Can the SDC 350V be used indoors only, or is it rated for outdoor mounting?

A: The 350V is designed for indoor or covered outdoor installation. For fully exposed outdoor applications with heavy rain or salt spray, consult the datasheet for environmental limits or consider additional weatherproofing.

Ted Perry

Perspective based on aggregated IP Security Depot and affiliated engineering team experience.

The SDC 350V is a no-nonsense electromagnetic strike for small-to-medium access control deployments. Its 24VDC power and OSDP protocol backbone align well with modern hardwired and IP-hybrid systems, and the 250,000-credential capacity across 10 doors scales naturally for a warehouse or office complex without requiring parallel controllers for different access zones.

Technical Highlights:

• 24VDC Strike Supply: Standard voltage already present on most access panels eliminates custom power conditioning. Wiring is a straightforward low-voltage run to the frame mortise—no special cabling or isolation required, and replacement parts (24VDC relays, solenoids, PSUs) are commodity stock at any electrical supplier.
• OSDP Two-Way Protocol: Bidirectional communication allows your access panel to request strike status (energized/de-energized, fault detection) in real-time rather than relying on polling. This matters for audit trails and emergency lockdown scenarios where you need immediate feedback that a door is secured.
• 250,000 Credentials Across 10 Doors: That credential depth is valuable when managing workforce rotation, contractor access, or seasonal staffing without needing to reset user pools between access points. One strike deployment can absorb a large manufacturing site's badge ecosystem.

Deployment Considerations:

• Fail-Safe by Design: The 350V unlocks when power is lost—correct for general access but unacceptable for high-security vaults or secure rooms. If you need fail-secure (locked on power loss), the strike itself cannot deliver that; you'll need a manual deadbolt or electromagnetic latch on the door itself, which complicates the hardware spec.
• Wired Only—No Wireless Fallback: This is a hardwired strike. If your access panel loses connectivity or power, the 350V follows the panel's behavior. For sites requiring emergency unlocking via cellular backup or battery-backed reader, a separate wireless override mechanism or UPS is necessary.
• Credential Migration Risk: Moving from 125kHz proximity to DESFire/NFC requires reader replacement, but the 350V can accommodate both in the same deployment. Plan reader upgrades independently of the strike replacement cycle to avoid unnecessary hardware swaps.

Best fit: warehouse access zones with centralized panel control, retail stock rooms transitioning from proximity to NFC, and light industrial facilities needing reliable credential capacity without cloud complexity. Skip the 350V if fail-secure is mandatory or if you're building a fully IP-based, cloud-integrated access platform—use an IP strike controller instead.