HES 74R2-130 Electric Strike

We've installed the HES 74R2-130 on dozens of commercial retrofit projects, and it remains a solid workhorse for integrators looking to add electronic locking to standard outswinging doors without major frame rework. The key operational advantage over electromagnetic locks or magnetic locking is mechanical simplicity — no magnetic coil to de-energize, no sustained power draw during occupancy. You send a momentary 12VDC pulse from your access control panel, the solenoid retracts the bolt, door opens, solenoid spring resets. On a 100-door office building, that power profile difference is real money year-over-year. We've also seen it paired with motion-sensor override logic — unlock the stairwell door if fire alarm is triggered, lock it down during off-hours. The trade-off: the 74R2-130 requires active control signal from your panel. It's not a passive stand-alone lock like a mechanical strike. If your panel loses power or communication, the strike posture (locked or unlocked) depends on your failsafe configuration. Most of our deployments choose fail-unlock for life-safety compliance, which means power loss = door unlocks automatically. That's a feature in fire emergency, but it's a control risk if your facility policy demands fail-secure. Verify that constraint early with your end-user's security director and your local AHJ (Authority Having Jurisdiction) before spec'ing the hardware.

Technical Highlights:

• 12VDC Solenoid Actuation: Low-voltage DC control eliminates the need for 110VAC wiring to the door frame. Sourced from access control panel auxiliary supply (standard on all commercial panels). Momentary 2–4A draw during unlock pulse, zero draw when locked — much lower sustained power than magnetic locking.
• Electromechanical Strike vs. Electromagnetic Lock: Requires only control pulse, not sustained power. Simpler spring mechanism, lower failure rate in high-cycle environments (hospitals, secure facilities). Mechanical reliability is a differentiator if your site has poor UPS backup or unreliable auxiliary power.
• Retrofit-Friendly Form Factor: Mounts into standard commercial door strike pocket (Ada / commercial frame standard). Most outswinging hinged doors can accommodate retrofit in under 30 minutes of labor. No need to relocate frame or re-hinge the door.
• Failsafe Configurability: Field-jumperable or control-logic-set for fail-unlock (emergency egress) or fail-secure (intrusion prevention). Our experience: commercial offices and institutional facilities almost universally choose fail-unlock to comply with life-safety code. Healthcare facilities sometimes split: main egress fail-unlock, secure ward doors fail-secure with manual emergency release lever.
• Access Panel Compatibility: Works with any commercial access control panel that can source a 12VDC relay output (Tyco, Honeywell, Salto, dormakaba, Isonas, Mercury, etc.). No proprietary firmware or encoding required. Integrators love this because panel choice is independent of strike choice.

Deployment Considerations:

• Verify your access control panel has a spare relay output rated for 12VDC and 2–5A minimum. Older panels may have limited relay capacity; confirm before ordering the strike.
• Run 18 AWG or heavier twisted pair from panel relay to strike location. Anything over 50 feet should be double-checked for voltage drop (12VDC with 3A draw across 60 feet of 20 AWG can sag below operating threshold). Use a dedicated auxiliary 12VDC supply if the panel's built-in power is already saturated.
• Fail-unlock vs. fail-secure posture must be decided in design phase. Document this in your statement of work and verify with the end-user's security director. Life-safety code almost always mandates fail-unlock on main egress doors, but secure areas may require fail-secure with a manual release lever nearby.
• Pair the strike with a door position switch (inexpensive reed or magnetic sensor) if you need to audit whether the door is actually open after unlock signal. The strike itself doesn't report position; only the panel knows when it sent the unlock command.
• In high-traffic areas (lobbies, emergency departments), expect 5,000–10,000 unlock cycles per year. The HES solenoid mechanism is rated for 1M+ cycles, so longevity is not a concern. Plan for periodic inspection of the spring mechanism if the site uses the door more than 100 times daily.
• Test failsafe behavior during commissioning. Kill power to the panel and verify the door unlocks (or locks) as configured. Walk through the unlock timing with security staff — how long between badge swipe and audible confirmation the door is unlocked? Slower strikes may frustrate high-volume foot traffic.

The HES 74R2-130 is the right choice for integrators building electronic access control into leased or managed commercial spaces where retrofit cost and minimal structural work are constraints. If you're designing a new build with pre-rough-ed access control cabling and unlimited power infrastructure, you might consider a magnetic lock for higher flexibility and supervised status reporting. But for fast retrofit, low power draw, and mechanical reliability in standard commercial frame, the 74R2-130 consistently delivers. See the HES catalog for related strikes, electromagnetic locks, and access control hardware.