SDC Z7252EQR 12/24VDC ECLIPSE Electrified Cylindrical Lockset

The SDC Z7252EQR is a Grade 1 solenoid-controlled electrified cylindrical lockset engineered for commercial, industrial, and institutional door openings where retrofit compatibility and enterprise-scale credential management are critical. Operating at field-selectable 12/24VDC with integrated power regulation, it replaces standard mechanical cylindrical locks without requiring separate electric strikes, magnetic locks, or auxiliary egress hardware. The ECLIPSE trim design integrates seamlessly into existing door hardware footprints, and the proprietary vandal-resistant clutch addresses physical abuse in high-traffic secured environments. With OSDP and TCP/IP wired connectivity, it connects directly to third-party access control systems supporting up to 250,000 user credentials across 63 networked doors.

Key Features

• Grade 1 Solenoid Strike: Withstands 5,000+ lbs. of abuse force per ANSI standards. Delivers reliable, tamper-resistant access control on high-security perimeter and internal doors.
• 12/24VDC Field-Selectable Power: Single unit adapts to 12VDC or 24VDC supply; built-in regulator eliminates external conditioning hardware. Reduces spare-parts inventory and simplifies branch office deployments.
• OSDP & TCP/IP Wired Connectivity: Direct integration with third-party access control platforms (Genetec, Salto, Hirschfeld, Vanderbilt, etc.). No proprietary gateway or license fees—standard open protocols.
• Multi-Credential Support: Reads DESFire, MIFARE, NFC 13.56 MHz, and 125 kHz proximity cards. Supports 250,000 user credentials per door or across networked array. Scales from single-door retrofits to 63-door enterprise floors.
• Failsafe/Failsecure Field-Selectable: Function 50 (failsafe—unlocks on power loss) or Function 52 (failsecure—locks on power loss). Configurable via control system without hardware modification.
• Latch Status & Request-to-Exit Monitoring: Standard LS output reports bolt state; optional REX output integrates egress-control logic directly into door automation or emergency-exit signaling. Eliminates separate request-to-exit boxes on monitored exits.
• Fire-Door Rated: Maintains latch integrity even when electrically unlocked, ensuring compliance on UL-rated fire doors and smoke barriers. No special door closer or auxiliary hardware required.
• Retrofit & New Construction: Direct mechanical replacement for most cylindrical locksets; no frame or latch modification. SFIC I-Core prep available for higher-security key management (keyed-alike or keyed-different cylinders standard).

The Z7252EQR sits at the intersection of mechanical reliability and networked credential scale. Where a magnetic lock or electric strike requires a separate accessory and a power management node, the Z7252EQR consolidates solenoid actuation, latch monitoring, and field-selectable voltage into one form factor that fits existing cylinder bores. This eliminates a supply-chain variable and reduces on-site wiring complexity. On a 30-door office retrofit, you avoid buying 30 individual electric strike frames, 30 power supplies, and 30 request-to-exit modules—and you gain OSDP-native reporting of bolt state on every entrance.

Integration with enterprise access-control systems is straightforward: OSDP or TCP/IP wired drops from your existing control panel to the door frame relay, no VLAN segmentation or wireless mesh required. The Z7252EQR responds to credential reads (DESFire, MIFARE, or 125 kHz) at the reader device upstream, meaning the lockset receives a simple 12 or 24VDC pulse to unlock. Latch status reports back via dry contact; request-to-exit wiring replaces that output if egress automation is needed. This wired topology is deterministic—no latency jitter, no mesh-network recalculation overhead—critical for fail-secure deployments where bolt reporting must be instantaneous and reliable.

Voltage regulation is factory-built, so branch offices or sites with marginal power infrastructure don't require additional 12/24VDC conditioners. The clutch design mitigates damage from forced-entry attempts or aggressive key manipulation; unlike some electrified cylinders that jam under physical stress, the Z7252EQR's vandal-resistant mechanism absorbs impact without loss of electrical function. On high-traffic healthcare campuses or detention facilities, that durability translates directly to lower field-replacement rates and reduced emergency unlock callouts.

Fire-door safety is baked in: even when the solenoid is energized (door electrically unlocked), the mechanical latch remains engaged. This preserves compartmentalization on rated barriers—a critical detail often overlooked in retrofit projects. The lockset doesn't require a fire-door-rated strike frame or a separate accessory to meet code; the mechanism itself is dual-function. Request-to-exit integration simplifies egress-aisle wiring on emergency exits: instead of a separate REX sensor + motion detector + solenoid control, a single REX line from the Z7252EQR to your access panel governs unlock logic during evacuation scenarios.

Jerry Tildsen

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

We've seen the Z7252EQR solve a specific retrofit pain point that trips up a lot of integrators: replacing mechanical cylindrical locks in older buildings where you need networked access control but can't justify a full electrified-lock hardware refresh. The ECLIPSE variant is SDC's answer to that middle ground—it's a solenoid-controlled cylindrical that fits the existing mechanical bore, doesn't require door-frame modification, and talks OSDP or TCP/IP to your control panel. On a 40-door office park retrofit, that's a real capex and labor savings compared to installing electric strikes and separate power supplies on every door. The field-selectable 12/24VDC voltage is underrated—most integrators don't realize how many legacy control systems run 12VDC, not 24. A single SKU that handles both eliminates confusion in the field and keeps spares simpler. Where the Z7252EQR differs from a basic electric strike is the latch status and optional REX integration; you get bolt feedback without running a separate sensor, and egress control doesn't require a motion detector or PIR—the lockset itself can gate unlock requests. That's elegant on smaller deployments where wiring drops are tight.

Technical Highlights:

• Grade 1 Solenoid Strike (5,000+ lbs. abuse resistance): SDC's solenoid design is rock-solid in high-traffic or contested areas. We've deployed these on detention facility perimeters and hospital secure wings—they handle repeated forced-entry attempts without loss of electrical function. The clutch mechanism absorbs impact instead of jamming, which is why field service callbacks are rare.
• Integrated Power Regulator (12/24VDC auto-select): Factory-regulated voltage means no external 12/24VDC power supplies or conditioning modules. On sites with aging electrical infrastructure or sites relying on UPS backup, one less external component to fail or manage.
• OSDP & TCP/IP Native (open-protocol wired): Direct integration without proprietary gateways. We've paired these with Genetec, Salto, and Vanderbilt systems—zero licensing surprises, zero additional hardware.
• Latch Status + Optional REX Output: Standard dry-contact LS reporting keeps you informed of bolt state; REX output eliminates the need for separate request-to-exit boxes on monitored exits. Reduces panel input count and simplifies egress-control logic.
• Fire-Door Rated (latch stays engaged even when energized): Compliance is automatic—no special frame or additional hardware needed. The lockset itself maintains compartmentalization on UL-rated barriers.
• 250,000-Credential Capacity across 63 Doors: Scales from single-door retrofits to medium enterprise deployments. OSDP backend handles credential sync across the array without local-reader storage bottlenecks.

Deployment Considerations:

• Retrofit mounting requires that the existing mechanical lock be a standard cylindrical-bore type. Mortise locks or lever-handle mechanisms require different hardware—verify bore diameter (typically 1 1/8″ or 1 1/4″) before ordering.
• Wired OSDP/TCP/IP means a power and control line to every door frame. On retrofit projects with limited conduit space, coordinate with the electrical crew early—running 12/24VDC + data through an existing hole can be tight.
• Failsafe vs. failsecure selection (Function 50/52) is a field-selectable configuration, but verify compliance requirements with local AHJ before installation. Fire-door egress requirements and life-safety code sometimes mandate one mode over the other.
• Request-to-exit wiring replaces standard latch-status output. If you need both LS reporting AND REX logic, coordinate with the access-control system to see if the panel can derive REX from LS feedback, or confirm that a separate REX interface is available on the reader/controller.
• SFIC I-Core prep is available for keyed-alike or keyed-different security; standard 6-pin cylinders are factory-included. On campuses requiring high-security key management, budget for I-Core master-key systems and verify that your integrating locksmith has I-Core reset tools on hand.

The Z7252EQR is the right choice for integrators retrofitting multi-door facilities where mechanical-lock replacement is required and networked credential scale matters. It's not a wireless product, and it's not a full-featured motor-driven lock—it's a solenoid strike that happens to live in a cylindrical form factor and talk OSDP. That narrowness is its strength: fewer moving parts, fewer power demands, fewer integration variables. If you're speccing access control for a 40-door office, a healthcare clinic, or a light-industrial facility, and the existing locks are mechanical cylinders, this lockset earns its place on the bill of materials. Explore the full range of solenoid and electrified-lock options in the SDC catalog.