Von Duprin PS904 Base Power Supply 4A 12/24 VDC Field Selectable for Access Control

Von Duprin PS904 Base Power Supply 4A 12/24 VDC Field Selectable for Access Control

Consolidated PS900 Series Power Supply for Commercial Access Control Applications

The Von Duprin PS904 Base Power Supply is part of the PS900 Series, a consolidated line of power supplies and accessories engineered to deliver enhanced flexibility and functionality for the evolving access control market. This unit converts high-voltage AC input (universal 120–240 VAC) into low-voltage DC outputs—either 12 VDC or 24 VDC—selectable via a field-selectable jumper, providing a constant output rating at both voltages for superior performance. UL 294 certified and Class 2 rated, the PS904 delivers filtered and regulated power that protects downstream access control devices in demanding commercial environments.

Professional Features & Benefits

• Field-Selectable Voltage Output: Constant output rating at both 12 VDC and 24 VDC via an included field-selectable jumper, providing superior performance and installation flexibility across a wide range of access control devices.
• Universal AC Input: Accepts universal 120–240 VAC input, making the PS904 compatible with standard commercial power infrastructure without requiring additional transformers or adapters.
• Class 2 Rated & Regulated Output: Delivers low-voltage DC power that is filtered and regulated, protecting downstream devices and meeting Class 2 power requirements for safe, code-compliant installations.
• UL 294 Certified: Fully certified to UL 294—the recognized standard for access control equipment—ensuring compliance and reliability in commercial security applications.
• Electronic Power Limiting Foldback Circuit: Built-in AC current overload protection via electronic power limiting foldback circuit, along with a fused primary input, safeguards connected devices and the power supply itself.
• Polarized Connectors & Flat Option Board Mounting: Polarized connectors for option boards eliminate the need for racks and side connectors, while flat mounting of option boards provides easier access to terminal blocks for connection of electrified devices.
• AC Status Monitor & LED Indicators: Isolated SPDT contacts for AC status monitoring, plus AC input and DC output LED status indicators and cover-mounted AC input indication, enable quick visual verification of system status.
• Fire Alarm Relay Configurable: The fire alarm relay can be configured to provide either switched or un-switched outputs from the power supply, supporting integration with emergency systems.
• Battery Back-Up Board Auto-Selects Voltage: Compatible battery back-up board automatically selects the correct voltage, ensuring seamless transition to backup power without manual intervention.
• Hinged Cover with Lock-Down Screws & High Voltage Protective Cover: Secure enclosure design with a hinged cover, lock-down screws, and a high-voltage protective cover for safe access and tamper resistance.
• Extensive Option Board Ecosystem: Compatible option boards include the 900-4R (4 relay controlled output board), 900-4RL (4 relay distribution board with logic for time delay, auto operator, and security interlock), 900-8F (8 individually fuse-protected outputs), 900-FA (emergency fire alarm interface relay), 900-BB (battery backup), 900-2RS (2 relay EL panic device control board, PS914 only), and 900-BBK (battery backup kit with two 7A/hr batteries providing up to four hours of backup power when cycled every 5 minutes at full load).
• Grade 1 Commercial Rating: Rated Grade 1 for use in demanding commercial access control installations where reliability and durability are essential.

Technical Specifications

• Product Group: Electronic Access Controls
• Series: Electrical Products
• Grade: Grade 1
• Product Subgroup: Power Supplies
• Subcategory: Power Supplies
• Product Type: Power Supplies
• Commercial/Residential: Commercial
• Product Category: Electronic Access Controls
• Department: Door Hardware

Professional Applications

• Commercial Building Security and Access Control Systems
• Healthcare Facility Access Control and Emergency Egress
• Educational Institution Safety and Security Systems
• Retail Loss Prevention and Entry Management
• Industrial Facility Monitoring and Access Points
• Government and Municipal Building Security Infrastructure
• Multi-Tenant Residential and Mixed-Use Property Access Control

Why Choose Von Duprin Quality?

Von Duprin PS900 Series power supplies are UL 294 certified and Class 2 rated, delivering filtered and regulated low-voltage DC power engineered for the rigorous demands of commercial access control. The PS904 supports a broad ecosystem of compatible option boards—including relay, logic, fuse-protection, fire alarm interface, and battery backup configurations—providing the flexibility to scale and adapt to complex security system requirements. With Grade 1 commercial ratings and a robust, field-configurable design, Von Duprin power supplies are a trusted foundation for professional access control installations where dependable performance is essential.