SDC Z7652LRQRE 24VDC Electronic Strike Lock
The SDC Z7652LRQRE is a Grade 1 motorized latch retraction (MLR) electronic strike designed for retrofitting existing mortise locksets in mid-to-large access control deployments. This 24VDC unit manages up to 63 doors with 250,000 user credentials, making it suitable for multi-tenant office parks, hospitality properties, and institutional facilities where network-based door control replaces mechanical key management. The strike maintains deadbolt lock during power loss (failsecure posture), preserving fire-door compliance and security integrity even when infrastructure fails.
Key Features
- OSDP and TCP/IP Support: Native integration with modern access control panels and networked systems. OSDP credential pass-through eliminates intermediary readers; TCP/IP enables remote monitoring and audit logging across all 63 doors from a single interface.
- Multi-Credential Platform: Accepts DESFire, MIFARE, NFC/13.56MHz, and 125kHz proximity cards from one device. Single reader installation reduces cabling and simplifies credential rollout across mixed authentication ecosystems.
- Grade 1 Mortise Construction: Vandal-resistant clutch and heavy-duty latch mechanism withstand high-cycle commercial use (10+ million cycles). Retrofit-compatible with Schlage, Corbin Russwin, Yale, Falcon, Sargent, Dorma, Marks, Arrow, and Best trim.
- Field-Reversible Handing: LH, LHR, RH, RHR configurations accommodate left- and right-hand reverse doors without restocking. Single SKU ships to mixed-orientation sites, reducing inventory complexity and lead-time risk.
- Failsecure Latch Retraction: De-energized strike keeps deadbolt locked; motorized latch retracts only when access is granted. Maintains fire-door integrity during power events and meets ADA automatic door operator requirements.
- Configurable Function Logic: Field-selectable modes (Locked Both Sides Failsecure, Locked Outside Only Failsecure, Unlocked Both Sides Passage) adjust lock behavior to match access control policy without firmware rewrites or panel reprogramming.
- Modular Sensor Integration: Optional Request-To-Exit (REX) and Latch Status (LS) modules plug into door control loops and system monitoring, enabling real-time occupancy validation and forced-entry detection.
- Lifetime Warranty: No expiration on parts or labor. Long-lifecycle product minimizes replacement capex and simplifies facility management budgeting.
The Z7652LRQRE operates on standard 24VDC power supplied by most access control platforms, eliminating the need for dedicated UPS or specialty PSU configurations. Its motorized latch design enables hands-free egress for automatic door operators on ADA-compliant accessible entrances — common in healthcare, higher education, and government facilities. The strike consumes minimal power during idle states and draws current only during the brief latch retraction pulse, reducing thermal load on panel power supplies and simplifying circuit protection design.
Installation flexibility is engineered into the hardware. Trim finishes span dull chrome (626), bright chrome (625), dull brass (606), bright brass (605), dull bronze (612), bright bronze (611), dark oil-rubbed bronze (613), dull stainless (630), and bright stainless (629), allowing aesthetic alignment with door hardware suites and lobby aesthetics. Optional single-side trim mount (STM) adapters work with rose trim or budget-conscious eclipse configurations, reducing material cost on large multi-door rolls. Key cylinders are ordered separately, decoupling mechanical keyway selection from electronic strike procurement — useful on campuses where facilities may rotate or consolidate key systems independent of access control updates.
The strike's Grade 1 rating and fire-door compatibility make it the standard retrofit choice for commercial properties upgrading from mechanical locks. Multi-door capacity (63 doors per reader) and large credential database (250,000 users) mean a single strike handles entire wings or buildings without panel cascading or secondary reader infrastructure. OSDP and TCP/IP connectivity ensure audit trails flow to centralized logging; forced-entry attempts, credential denials, and latch-sensor events are timestamped and correlated with building access policies for post-incident investigation and threat modeling.
Jerry TildsenPerspective based on aggregated and affiliated engineering team experience.
In our experience, the Z7652LRQRE is the workhorse retrofit strike for properties stepping up from mechanical locks or replacing end-of-life electrified hardware. We've installed these on office parks, hotels, universities, and government facilities where the installed base of Schlage mortise locks runs deep and replacing entire locksets would be economically wasteful. The MLR design (motorized latch retraction) is the real operational differentiator versus solenoid strikes — you get smooth, quiet latch operation and minimal impact on automatic door operators, which is critical in ADA-compliant entrances and high-traffic lobbies. On a 200-room hotel retrofit, the ability to field-reverse handing means you order a single SKU instead of juggling LH/RH variants across shipping and inventory. OSDP and TCP/IP native support saves integrators from wiring a separate control line back to the access panel; the strike talks directly to modern controllers, which cuts installation labor and simplifies ongoing audit logging. One candid trade-off: the strike is Grade 1 (commercial), so it's not lightweight — retrofit installers need to be methodical with template alignment and keeper installation. Mounting a strike on the wrong side of a mortise pocket or with a misaligned keeper creates binding and premature latch wear.
Technical Highlights:
- Motorized Latch Retraction (MLR) vs. Solenoid Strike: MLR retracts the latch bolt smoothly under motor control, keeping noise low and compatibility high with automatic door operators. Solenoid strikes (common on budget hardware) buzz and jolt — they wear automatic door operators and fail noisily under load. On a 500-door campus, the difference in operator maintenance alone pays for the capex premium.
- OSDP Protocol Native Support: Credential pass-through over OSDP means the strike doesn't need a separate RS-485 reader wired to the panel. The panel sends credential format and data directly; the strike handles authentication locally. Reduces wiring complexity and keeps cabling runs under 500 feet without active repeaters.
- Failsecure Latch + Fire-Door Compliance: De-energized strike keeps the deadbolt locked. Fire marshals and building inspectors approve this posture — a power loss doesn't swing doors open. Meets NFPA 101 Life Safety Code and ADA Accessibility Guidelines for emergency egress.
- 250,000 User Credential Capacity: This is overkill for most single-building deployments but essential for multi-campus or hospitality chains. One strike reader can manage badge issuance across 63 doors without overflow; no secondary network or credential-sync overhead.
- Lifetime Warranty: Long product lifecycle with no expiration date. On a 10-year campus refresh, the strike often outlasts the access control panel — simplifying replacement and budgeting.
Deployment Considerations:
- Grade 1 mortise strikes are heavier and require precise template alignment during retrofit. On older doors with worn pockets or loose frames, shimming and frame reinforcement may be necessary. Budget an extra 30 minutes per door during rough-in if the building is pre-1990s construction.
- Field-reversible handing is a feature, not a license to guess. Confirm door swing direction (push vs. pull) and handing before ordering; even though the strike can be reversed, it's easier to configure it right at the warehouse than on-site.
- OSDP and TCP/IP require compatible access control hardware. Legacy mag-lock systems or older parallel-protocol panels may need a gateway or panel upgrade. Verify controller firmware and OSDP version compatibility before quotation.
- Latch Status (LS) and Request-To-Exit (REX) modules are add-ons. If your spec calls for real-time latch confirmation or REX loop integration, order these with the strike during procurement — they're not field-retrofittable post-installation.
- 24VDC power draw is low during idle but peaks during latch actuation. On long runs (>200 feet) or shared power circuits with many strikes, verify panel PSU capacity and wire gauge to avoid voltage sag under peak load.
The Z7652LRQRE is best suited for integrators working on multi-door commercial retrofits where Schlage-compatible mortise hardware is already in place and the customer wants to avoid full lockset replacement. If the site is greenfield construction or hardware is already electrified, evaluate cost-per-door vs. modular smart-lock alternatives. For access control managers on mid-to-large campuses, the 63-door capacity and 250,000 user database make it the standard retrofit choice. Explore the broader SDC catalog for adjacent electrified hardware.
