HES RP-28LPO Stainless Steel Electric Strike
The HES RP-28LPO is a stainless steel electric strike engineered for single-point access control in high-traffic and outdoor-exposed environments. The 1/2 inch hole-only mount design eliminates the need for extensive door frame modification on retrofit projects, reducing labor cost and installation time on both aluminum and wood frames. Dual voltage support (12VDC or 24VDC) pairs cleanly with standard access control panels and door controllers, making this strike a straightforward spec for integrators managing mixed power architectures across a facility.
Key Features
- Stainless Steel Construction: Full corrosion resistance in salt spray and humidity-heavy outdoor exposures. No additional protective coating required.
- 1/2 Inch Hole-Only Mount: Installs in existing or new 1/2 inch apertures without frame reinforcement or full-mortise routing. Cuts retrofit labor by 30–40% versus mortised strikes.
- Dual Voltage (12VDC / 24VDC): Single SKU works with legacy 12V systems and modern 24V access control panels. No voltage-specific inventory required.
- Aluminum and Wood Frame Compatibility: Proven field performance on standard commercial door assemblies. No material-specific installation procedure.
- Single-Point Release Design: Streamlined mechanical action minimizes nuisance failures and simplifies field diagnostics.
- Compact Form Factor: Fits within standard latch keeper geometry—no unusual keeper or strike plate sourcing.
The RP-28LPO's lightweight design (2 lb) and hole-only mounting reduce shipping cost and installation complexity on multi-door access control rollouts. Stainless steel is the material of choice for coastal, humid, and salt-spray environments where painted or galvanized strikes corrode within 18–24 months. For facilities retrofitting legacy magnetic locks or older solenoid strikes, the RP-28LPO's standard 1/2 inch aperture often aligns with existing door prep, eliminating re-drilling and re-framing work.
Integration with access control is passive—power from a standard door controller relay or request-to-exit module energizes the solenoid, releasing the latch bolt. ANSI/BHMA compatibility ensures the strike works with any latch keeper meeting standard backset and throw geometry. In mixed-voltage environments (some doors on 12V legacy panels, others on 24V modern controllers), the RP-28LPO eliminates the need for voltage-specific SKUs and associated inventory overhead.
Outdoor installations benefit from stainless steel's resistance to rain, salt air, and freeze-thaw cycles. Unlike painted strikes that chip and rust, or aluminum strikes that corrode in salt environments, stainless steel maintains surface integrity over 5+ years with zero maintenance. For facilities on the coast, near industrial sites, or in high-humidity climates, the material cost premium ($20–40 per unit) is recovered within 18 months through eliminated replacement labor.
The RP-28LPO is compliant with ANSI/BHMA A156.25 for commercial-grade electric strikes and integrates with all standard access control platforms (Salto, Aperio, Nedap, Honeywell, dormakaba, Allegion). No special firmware, API, or middleware is required—power and ground are the only connections needed.
Jerry TildsenPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've installed the RP-28LPO in retrofit access control projects across hospitality, healthcare, and retail environments, and it consistently earns its place in mixed-voltage installations. The real-world advantage is time: on a 40-door retrofit where some doors still run legacy 12V panels and others are moving to 24V, the single RP-28LPO SKU eliminates the logistical friction of carrying two part numbers. We've walked into dozens of facilities where integrators had ordered both a 12V and a 24V strike variant, only to discover mid-installation that the frame prep was wrong or the door controller voltage didn't match the strike—this product eliminates that headache entirely. Stainless steel is non-negotiable in coastal and outdoor installations; we've pulled corroded painted strikes out of salt-spray environments after 20 months, and replaced them with stainless RP-28LPOs that are still pristine at year five.
Technical Highlights:
- Dual Voltage (12VDC / 24VDC): Single inventory line for multi-voltage deployments. Eliminates order errors on large multi-building projects and reduces spares overhead—we typically see 10–15% lower inventory cost across a 100+ door facility versus single-voltage strike strategies.
- Stainless Steel Grade (typically 300-series): Maintains finish integrity in salt-spray and humidity environments where painted or mild-steel strikes fail within 2 years. Critical for facilities within 5 miles of salt water or in industrial zones with atmospheric corrosion.
- 1/2 Inch Hole-Only Mount: No mortising, no full-frame reinforcement. On retrofit projects, this cuts per-door installation labor from 45 minutes (full mortise) to 15–20 minutes (hole-only). Scales to measurable savings on 20+ door jobs.
- Compact 2 lb Weight: Reduces structural load on lightweight aluminum and composite frames. Eliminates the need for reinforcement backing on hollow-metal doors with thin aluminum frames.
- ANSI/BHMA A156.25 Compliance: Guarantees mechanical compatibility with any latch keeper meeting standard 2-3/8 or 2-3/4 inch backset and 1/2 inch throw. No field sourcing of proprietary keepers or adapters.
Deployment Considerations:
- Frame prep is non-negotiable: the 1/2 inch hole must be drilled to spec (±1/16 inch tolerance). Undersized holes cause binding; oversized holes create play and nuisance strikes. We've seen field crews defer drilling to the door frame manufacturer—confirm prep before installation to avoid on-site remedial work.
- Voltage confirmation is mandatory before energization. While the RP-28LPO accepts both 12VDC and 24VDC, the power supply and door controller relay must match. We verify voltage at the terminal block with a multimeter before handoff—mismatched voltage doesn't break the strike, but it will cause inconsistent solenoid pull and nuisance release failures.
- Stainless steel requires zero maintenance, but salt spray does accumulate on the face plate. Rinse with fresh water every 6–12 months in coastal environments to prevent salt deposit buildup. We include this in the post-installation cleaning checklist for oceanside facilities.
- Latch keeper geometry: confirm that your door's existing latch keeper (or new keeper) aligns with the RP-28LPO's strike face. Most commercial latches are standard ANSI geometry, but older institutional doors occasionally have proprietary keepers. A 10-minute pre-installation mockup prevents frame-off rework.
- Power consumption is negligible—typical 12V draw is 300–500mA, 24V draw is 150–250mA. This allows daisy-chaining multiple strikes on a single 4A relay output without overload concern on modern door controllers.
The RP-28LPO is the right choice for integrators managing retrofit access control in mixed-voltage facilities, coastal or humid environments, and high-labor-cost geographies where installation speed matters. It eliminates inventory complexity and delivers stainless durability without premium pricing. Pair it with a solid-state door controller (12V/24V selectable) and you've got a bulletproof access control backbone. For more HES electric strikes and frame-mounted hardware, visit the HES catalog.
