Altronix PD4UL 4-Output Power Distribution Board
The Altronix PD4UL is a UL-listed power distribution board engineered for 28VAC/VDC auxiliary power circuits in security, access control, and integrated surveillance deployments. This board-form factor module provides four independent power outputs, allowing you to route and manage auxiliary power from a single centralized source across multiple security devices—door locks, magnetic strikes, and electromagnetic devices—without requiring separate power supplies for each load.
Key Features
- Four Independent Power Outputs: Separate 28VAC/VDC circuits eliminate single-point failures and allow individual load management. If one circuit trips or requires maintenance, the other three remain operational, reducing system downtime during troubleshooting or device replacement.
- 28VAC/VDC Compatibility: Matches the standard auxiliary voltage used throughout legacy and modern access control infrastructure. This voltage is industry-standard for door locks, solenoid strikes, and common electromagnetic devices, meaning you integrate the PD4UL without redesigning existing wiring or control logic.
- UL Listed Safety Certification: Meets electrical safety standards required in North America for integration into control panels and equipment racks. Simplifies code compliance and insurance requirements when the distribution board is part of a larger panel or cabinet installation.
- Board Form Factor Design: Mounts directly into equipment racks, control panels, or backplanes. No external enclosure required if integrated into an existing cabinet—saves space and simplifies assembly compared to standalone distribution units that consume additional rack depth.
- Auxiliary Module Construction: Designed as a companion to Altronix power conversion systems. When paired with compatible Altronix power supplies and chargers, the PD4UL creates a modular, scalable auxiliary power architecture that grows with your deployment.
- Lifetime Limited Warranty: Coverage for defects in materials and workmanship provides confidence in long-term reliability without ongoing warranty renewal costs—important for access control installations expected to run 5–10+ years with minimal maintenance.
Deployment Scenarios
The PD4UL suits multi-device access control and security installations where you need centralized power management. Typical applications include routing auxiliary 28VAC/VDC power to electromagnetic door locks, mag locks, electric strikes, and gate operators from a central panel. In larger deployments, the PD4UL integrates into security equipment racks supporting dozens of devices, consolidating wiring and reducing complexity. It also functions as a power management module in integrated control panel builds where auxiliary circuits must remain isolated and independently managed.
For systems relying on power infrastructure components, the PD4UL pairs with Altronix battery chargers, power supplies, and backup systems to create reliable, redundant auxiliary power distribution.
Compatibility & Integration
The PD4UL is designed as a module within the Altronix power ecosystem. Verify compatibility with your existing Altronix power supply or charger model before ordering. Board-form installation requires mounting space within a control panel or rack; confirm available board depth in your enclosure. Auxiliary power termination is field-configurable, supporting standard industry connector types—review the datasheet for recommended terminal block sizes and wire gauge limits for your specific loads.
Frequently Asked Questions
Q: Can the PD4UL power door locks and magnetic strikes simultaneously?
A: Yes. Each of the four outputs is independent, allowing you to distribute power to multiple devices in parallel. However, confirm the total current draw across all four circuits does not exceed the source supply's maximum output—check your Altronix power supply specifications.
Q: Is the PD4UL suitable for outdoor installations?
A: The PD4UL itself is a board-form module designed for indoor panel and rack mounting. It does not have an IP-rated enclosure. If outdoor protection is needed, mount it inside a weatherproof control cabinet or junction box.
Q: What happens if one output overloads?
A: Individual circuit protection and tripping behavior depend on the source power supply and any branch protection (fuses or circuit breakers) you install on each output. The PD4UL distributes power but does not include built-in overload protection per output—add external protection if isolation is required.
Q: Does the PD4UL work with non-Altronix power supplies?
A: The PD4UL is optimized as an auxiliary module for Altronix power conversion systems. Compatibility with other brands' power supplies requires verification of voltage, connector type, and current capacity. Contact the manufacturer or an integrator for confirmation before cross-vendor use.
Q: What is the warranty coverage on the PD4UL?
A: The PD4UL includes a Lifetime Limited Warranty covering defects in materials and workmanship. Review the warranty document for exclusions and claim procedures.
Ted PerryPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The Altronix PD4UL is a straightforward, modular approach to auxiliary power distribution in access control and security panel builds. It's not a power supply—it's a distribution board that sits downstream of your centralized 28VAC/VDC source, breaking one feed into four independent circuits. If your control panel architecture already relies on 28VAC/VDC auxiliary power, the PD4UL simplifies wiring and management by centralizing branch points in one module rather than hand-wiring multiple terminal blocks across the panel.
Technical Highlights:
- Four Independent 28VAC/VDC Outputs: Each circuit isolates load management—one overloaded or shorted output won't bring down the other three. This modularity matters in larger panels where you're distributing power to a dozen locks and strikes; one bad device or loose connector doesn't cascade into a full system failure.
- UL Listed Construction: Compliance with electrical safety standards removes friction during panel inspection and insurance sign-off. You're not betting on a generic, unvetted board design—UL listing means testing and validation against North American electrical codes.
- Board Form Factor for Rack/Panel Integration: Mounts directly into panel backplanes or equipment racks without consuming external wall space. If you're building a large multi-panel access control system, internal mounting saves cabinet real estate compared to standalone distribution blocks.
Deployment Considerations:
- The PD4UL is a passive distribution board—it does not include built-in breakers, fuses, or current limiting per output. You must add branch protection (fuses or circuit breakers) on each output if isolation or overload cutoff is required. Verify your Altronix power source's total current capacity before wiring all four outputs to full-load devices.
- This is an indoor, panel-mount module. It lacks environmental sealing (no IP rating). Do not mount it directly in outdoor cabinets or damp locations; enclose it in a weatherproof panel or cabinet first.
- Compatibility is tightest with Altronix power conversion systems. While 28VAC/VDC is a standard auxiliary voltage, connector types and current delivery specs vary across brands. If you're using a non-Altronix power supply, confirm pinouts and ratings match before assembly.
The PD4UL works best in mid-to-large multi-device access control deployments where you're already running centralized 28VAC/VDC auxiliary power and need clean, organized distribution to locks, strikes, and solenoids. It's not a luxury—it's a practical infrastructure play that reduces panel complexity and improves maintainability over time.
