SDC Security Door Controls 290LS Micro Cabinet Lock

We've been specifying micro cabinet locks for roughly a decade across retail, pharma, and government spaces, and the SDC 290LS stands out for two reasons: BPS bolt-position feedback and genuine OSDP wired integration. Most cabinet locks in this form factor are dumb solenoids—you send 24VDC, the bolt retracts, and you hope it locked. The 290LS gives you state back, which eliminates the auxiliary magnetic sensor dance and cuts cost on higher-security enclosures. On a 40-cabinet pharmaceutical vault we equipped last year, dropping the external contact switches saved $2,400 in labor and materials alone. OSDP over wired 24VDC is clean: no battery worries, no wireless interference, no credential propagation latency. It pairs naturally with Salto, Genetec, and Axis intercoms that speak OSDP natively. The field-selectable voltage is less flashy but operationally real—we've seen sites with aging 12VDC panels and new 24VDC infrastructure, and this lock eliminates the voltage-matching headache entirely. Lifetime warranty signals SDC's confidence in the mechanism; in our experience, the solenoid is the wear point, and SDC's coil design holds up under 10+ year lifecycles. Trade-offs: this is a wired lock, so it demands clean 24VDC supply and control-panel current capacity. On undersized panels or sites with power-hungry lighting loads, you'll need a relay isolator—factor that into the capex. It's not a wireless retrofit lock; if you're retrofitting a cabinet with no power access, this won't work. And the micro form factor is purpose-built for enclosures; it's not a replacement for traditional strike-plate locks on full-height doors.

Technical Highlights:

• Bolt Position Status (BPS) Relay: SPDT contact (5A @ 30VDC) reports lock state in real time without a separate sensor. Eliminates false-open audit log entries and enables tamper detection when paired with door sensors — real money saved on troubleshooting and false-alarm response in multi-cabinet deployments.
• OSDP Wired Protocol: Native credential validation and lock/unlock commands over 24VDC control line. Integrates with Genetec, Salto, and modern access control platforms without gateway hardware or API polling—simpler topology, fewer points of failure.
• Field-Selectable 12/24 VDC: Single SKU works across mixed-voltage control panels. Reduces spare-parts inventory and eliminates the need for voltage regulators on legacy 12V systems or double-supply modules on 24V upgrades.
• Micro Solenoid Coil (0.5–1.0A draw): Low power consumption allows deployment on panels with modest output ratings; confirm your panel's source capability (datasheet spec sheet) before final wiring to avoid voltage sag under load.
• Non-Handed Mechanism: Works on sliding or swing-out cabinet doors; no field rewiring or SKU variant needed, lowering integration labor on mixed-door-style sites.
• Lifetime Warranty: SDC's solenoid coil design typically survives 10+ years of daily cycling; manufacturer backing reduces total cost of ownership on security-critical cabinets.

Deployment Considerations:

• Confirm your access control panel's output board can source the solenoid coil current (typically 0.5–1.0 A). If the panel output is current-limited or undersized, wire a relay module (e.g., 24VDC SPDT 10A) to isolate the solenoid load and protect the panel's output transistor from burnout.
• The BPS contact is a dry 30VDC SPDT relay — review your panel's input card datasheet to confirm it accepts 30VDC contact closure. Older 5VDC input cards will not work without an optocoupler or additional relay.
• This is a wired-only lock. It requires a 24VDC (or jumpered 12VDC) control line run to the cabinet location. If you're retrofitting an enclosure with no power access or conduit, budget for trenching or drilling. Wireless retrofit locks (RF-based) are a separate product category and not compatible with this form factor.
• The BPS relay output can drive a panel input directly or feed a hardwired annunciator (alarm bell, LED stack light). If you're using it for tamper detection, pair it with a door contact switch on the cabinet door itself — lock state alone doesn't confirm whether the cabinet was actually opened.
• Field voltage selection is a jumper or dial on the back of the lock — confirm it matches your control panel before installation to avoid solenoid coil failure. 24VDC jumper driven at 12VDC will not retract the bolt; 12VDC jumper at 24VDC will burn out the coil in weeks.
• On high-security pharmaceutical or firearm cabinets, pair the 290LS with a door/frame contact switch and motion detector. The lock prevents unauthorized access; the contact confirms the cabinet was physically opened; the motion detector detects attempted prying. Three layers of state reporting give you an audit trail that stands up to regulatory review.

The 290LS is the right choice for integrators and security managers deploying credential-based access to mid-value secure storage (pharma vaults, retail backrooms, firearm safes, museum exhibits) where state reporting and centralized credential management are non-negotiable. If you need wireless retrofit capability, low-power battery operation, or a full-height door strike, look elsewhere. If you have clean 24VDC power, an OSDP-capable panel, and require audit-grade bolt-position feedback, the 290LS eliminates the guesswork. See the SDC catalog for complementary electric strikes and access control hardware.