HES SLP-2L Electric Strike Lock Accessory

We've installed the SLP-2L across dozens of retrofit and new-build projects, and it remains one of the most reliable 12V strikes in its class. The reason is straightforward: stainless steel eliminates corrosion failures in HVAC-heavy spaces, the dual solenoid design gives you real operational flexibility (redundancy or split control), and the 1/2-inch strike body means zero frame modifications on 99% of commercial doors. What separates the SLP-2L from commodity strikes is the integration quality—HES engineering ensures the solenoid mounts are stable, the LED is visible without disassembly, and the electrical terminals are keyed to prevent reversed polarity during roughed-in commissioning. We've seen installations where a poorly designed strike forces you to pull the frame every time you need to swap a solenoid; the SLP-2L is not that product.

Technical Highlights:

• Dual Solenoid Configuration (2EA DSW-4): Allows one strike to be controlled by two independent access control outputs—critical in redundant panel deployments or tiered credential verification (card reader + PIN pad). If one solenoid fails, the second remains functional, reducing false lockouts. We've used this in high-security lobbies where entry requires both badge and code.
• Fail-Safe and Fail-Secure Switchable Design: The same hardware supports both modes without purchasing two different strikes. Fail-secure (locked on power loss) is required by fire code in some jurisdictions; ability to reconfigure in the field without hardware swap saves time and cost on post-occupancy changes.
• Red LED Status Indicator: Non-negotiable for troubleshooting on live systems. We can visually confirm strike is energized without breaking the door security chain; on a 20-door project, this eliminates ten callbacks to onsite testing.
• Stainless Steel, US Manufactured: No hidden rust failures after three years. Domestic sourcing means shorter lead times and easier warranty support compared to offshore imports.
• 1/2-Inch Strike Body: True standard—fits 99% of hollow-metal and wood commercial frames. No frame mortising, no structural reinforcement, no budget surprises mid-install.

Deployment Considerations:

• Verify your access control panel output supports the strike's rated solenoid draw. A single DSW-4 solenoid pulls approximately 0.3–0.5A at 12V; if you're running dual solenoids, you need panel outputs rated for 1A+ or you'll encounter intermittent energization. Pull the datasheet before ordering.
• Red LED is visible but not bright enough to troubleshoot in direct sunlight outdoors; if you're retrofitting an exterior door, consider a secondary mechanical test point or a multimeter continuity check as backup confirmation.
• Fail-secure mode requires UPS backing on the access control power supply. If the panel loses power, the strike locks immediately; without backup, you have a building lockout until utility power returns. Plan this into your power architecture before commissioning.
• The strike mounts on the frame side, not the door; door frame condition matters. If the frame is cracked or the mounting surface is not flat, the strike may not seat properly and will buzz or chatter on energization. Inspect frames before installation.
• Solenoid modules (DSW-4) are field-replaceable but not field-adjustable. If a solenoid fails, you swap it; you don't repair it. Stock spares on larger deployments to avoid emergency downtime.

The SLP-2L is the right choice for integrators specifying commercial access control on a tight timeline and budget—no surprises, no custom mounting, no corrosion callbacks. Pair it with a quality access control panel (Salto, Allegion, DMP) and standard PoE infrastructure, and you have a door control foundation that will outlive most of the site's other systems. For more HES strikes and access control hardware, see the HES catalog.