HES SLP-1M 12V DC Electric Strike Stainless Steel
The HES SLP-1M is a 12V DC electric strike purpose-built for retrofit and new installations into standard commercial door frames. Stainless steel construction delivers corrosion resistance in both indoor and outdoor-rated environments, while the single-gang form factor minimizes frame modification and reduces installation labor. This strike integrates directly into any conventional access control system operating at 12V DC — no specialized power supplies or signal conditioning required.
Key Features
- 12V DC Power: Direct integration with standard access control circuits. Operates on common 12V power distributions; no PoE, no DC-DC converter needed.
- Stainless Steel Housing: Resists salt spray and moisture degradation in outdoor-rated applications. Extends operational life in high-humidity or coastal environments without annual maintenance.
- 1/2-inch Latch Compatibility: Fits industry-standard door latches on hollow metal and wood frames. No custom hardware or fabrication required — spec to existing door prep.
- Single-Gang Form Factor: Compact design fits standard door frame opening. Minimizes structural modifications and reduces retrofit project scope compared to larger strike housings.
- Red LED Status Indicator: Pre-installed visual feedback shows strike activation in real time. Supports manual verification and helps diagnose power or control signal faults during commissioning.
- Hollow Metal and Wood Frame Compatible: Works with both hollow metal and solid wood frame preparations common in commercial, institutional, and government facilities.
- Mounting Hardware Included: Fasteners and brackets supplied; ready for immediate installation without sourcing additional hardware.
The SLP-1M operates at low power draw, compatible with standard access control power supplies and battery backup systems. The electromagnetic locking mechanism engages within milliseconds of control signal, providing consistent door security without mechanical wear or calibration drift over time. Stainless steel eliminates the annual maintenance cycles required by painted or zinc-plated strikes in outdoor or high-moisture settings.
Deployment contexts include commercial office access control, educational institutions, healthcare facilities, government buildings, and secured parking structures. The strike integrates with card readers, keypads, mobile credential systems, and intercom entry stations — any standard 12V DC access control controller. On retrofit projects, the single-gang housing often eliminates the need for door frame reinforcement, reducing total project cost and installation downtime compared to larger strike models.
The SLP-1M is compatible with all major access control platforms (Salto, dormakaba, HID, Honeywell, Bosch, Genetec) that output 12V DC strike control. ONVIF integration is not applicable to electric strikes — power and signal come directly from the access control panel. For battery backup integration, confirm your UPS or backup power system supports 12V DC output at the amperage required (typically 0.5–1.0A per strike during energized hold).
Jerry TildsenPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've installed the HES SLP-1M across dozens of retrofit projects, and it remains one of the most straightforward electric strike choices for existing door hardware. The stainless steel housing is the real differentiator here — in a typical retrofit, you're retrofitting into aged frames, and painted or galvanized strikes rust within 18 months in outdoor or semi-exposed conditions. Stainless eliminates that cycle. The 1/2-inch latch compatibility is also critical: most hollow metal and wood frames ship with 1/2-inch latches as the industry standard, so this strike avoids the cost and delay of custom latch sourcing. Power draw is modest (under 1A at 12V), which means you can back up 8–12 strikes on a standard 12V access control UPS without oversizing. The red LED is less flashy than some competitors' blue or green indicators, but it's visible in bright sunlight without glare — a real advantage on outdoor door frames.
Technical Highlights:
- 12V DC Single Voltage: Operates on any 12V power supply or battery backup system — no dual-voltage switching or power conditioning boards. On a 32-door building, you can run all strikes from a single 12V UPS rated for the aggregate amperage. Simplifies commissioning and reduces spare parts inventory.
- Stainless Steel Grade (Type 304 equivalent): Corrosion resistance rated for outdoor and marine salt-spray environments. Real-world consequence: strikes installed in covered outdoor areas or high-humidity parking structures see zero rust after 5+ years; galvanized alternatives require repainting or replacement every 18–24 months.
- 1/2-inch Latch Compatibility: Fits 90%+ of commercial hollow metal frames without modification. On a 50-door project, this specification alone can save 2–3 weeks of frame inspection, custom latch ordering, and field re-work.
- Single-Gang Form Factor: Fits standard electrical box opening in door frame. Eliminates custom frame reinforcement or grinding — install hardware as-is. Typical labor savings: 30–45 minutes per door on retrofit jobs.
- Red LED Indicator (pre-installed): Shows strike energization status without opening the door or testing with a voltmeter. On service calls or during access control troubleshooting, you can verify strike power from across the room — critical for fault isolation in high-traffic entry points.
Deployment Considerations:
- 12V DC power sourcing: Confirm your access control panel or power supply outputs 12V DC at sufficient amperage. If you're retrofitting an older system with 24V DC strikes, you'll need a step-down converter or new power supply — plan for that lead time and cost.
- Door frame pre-drill verification: Before ordering, physically inspect the door frame to confirm 1/2-inch latch and standard single-gang opening. Odd frame preparations (custom latches, reinforced frames) will require field adaptation. On large deployments, a site survey saves cost and delays.
- Outdoor installation grounding: On exterior doors, ensure the door frame is bonded to ground via the building's electrical system. Stainless housing provides corrosion resistance, not lightning protection — proper grounding is your primary defense against electrical surge.
- Battery backup sizing: If you're integrating this into an access control system with UPS backup, size the 12V UPS for the total current draw of all strikes. A typical strike draws 0.6–0.8A during activation; underestimated backup capacity will cause unexpected strikes to release under power loss.
- Control signal wiring: Strikes require low-voltage access control wiring (typically 18 AWG or 16 AWG). Separate this run from building power and data cables to avoid inductive coupling and noise — a common source of false strike activations during commissioning.
The SLP-1M is the right choice for commercial retrofits, multi-door installations where stainless durability matters, and any project where you want to minimize frame modification and labor cost. It's a mature, no-surprises product with broad platform compatibility. Consider alternatives only if your door frame uses non-standard latches (1/4-inch or 5/8-inch) or if your facility has a standardized platform preference (e.g., all Salto or dormakaba hardware). For mainstream access control, spec the SLP-1M and move on. Explore more HES access control hardware.
