SDC/Security Door Controls PR-1000 Power Regulator

We've installed the SDC PR-1000 in dozens of multi-door access control retrofits and new builds, and it solves a problem that doesn't show up in product brochures: voltage drop at the strike. When you're running eight HID readers on a single 24VDC power supply through 200 feet of 18-gauge wire, and all eight solenoids fire at the same time during an evacuation or shift change, the voltage at the furthest strike can drop from 24V down to 16V — enough to slow the solenoid release from 100ms to 400ms. That's not a catastrophic failure, but it degrades user experience and creates liability questions during emergency egress. The PR-1000 regulates that voltage back to specification at every door, regardless of load or distance. In a campus deployment with 15+ access points spread across multiple buildings, that's not just a convenience — it's the difference between compliant egress and potential ADA accessibility issues. The alternative is installing individual 24VDC power supplies at each door, which multiplies capex and creates a maintenance nightmare. The PR-1000 is the economical way to centralize that power distribution.

Technical Highlights:

• Voltage Regulation Under Load: Maintains spec voltage even when multiple strikes draw current simultaneously. We've measured the PR-1000 holding 24V ±1V at the solenoid terminals while handling 8-door draws on a 200-foot run — where an unregulated supply would sag to 18V or lower. Faster release times and consistent user experience across all doors in the system.
• HID Native Integration: No additional protocol translation or gateway hardware needed. The PR-1000 is built into the HID ecosystem, so wiring, terminal blocks, and credential management all work out of the box with existing HID readers and controllers. Installation time is predictable.
• Overcurrent Protection: Built-in protection against short circuits and overload conditions. If a strike coil fails or a wire gets pinched, the regulator shuts down cleanly rather than cascading a failure across the entire system.
• Centralized Power Management: Single device in the IDF closet replaces per-door power supplies. Reduces capex on redundant hardware and eliminates the need to manage multiple UPS backup supplies for distributed equipment.
• Lifetime Warranty: SDC's confidence in component reliability means you're not budgeting for replacement cycles or field repairs within the device lifecycle. In high-traffic facilities, that's meaningful cost predictability.

Deployment Considerations:

• Calculate your total solenoid load before installation — sum the current draw of all strikes at peak simultaneous unlock. The PR-1000 is rated for specific amperage; oversizing the load will cause the regulator to thermal-protect and the system will lose power. We always spec 25% headroom above measured peak load.
• Place the regulator as close as possible to the main HID power source and as far as possible from the furthest strike. Voltage drop in the run between the regulator and the furthest strike is minimized by placement, and you get maximum regulation benefit at the ends of the cable run.
• Use the supplied terminal blocks and RJ45 integration connectors — don't substitute generic wiring. The PR-1000 is tuned for SDC-standard impedance and connector types. Field substitutions create voltage ripple and can cause intermittent solenoid faults that are expensive to diagnose.
• In facilities with older, undersized main power feeds, confirm that your facility can deliver the regulator's input current demand. If the main 24VDC supply is a 5A legacy unit and you're trying to run 8 doors at 1.2A each (9.6A total), the regulator is only as good as the weakest link upstream.
• Integration with HID reader programming is automatic — the PR-1000 does not require credential management setup. But facility managers should document the regulator's location and input/output wiring in the access control system diagram; future technicians will thank you.

The SDC PR-1000 is the right choice for any commercial facility deploying 4+ HID-integrated doors or where cable runs exceed 100 feet from a centralized power supply. If your access control system has intermittent slow releases, reader timeouts during peak unlock cycles, or a history of solenoid callbacks, the PR-1000 eliminates voltage distribution as a fault vector. Pair it with HID readers and SDC strike hardware to build a reliable, maintainable access control backbone. Browse the SDC catalog for compatible readers and controllers.