Von Duprin PS904-2RS-FA Access Power Supply 2 Relay

Product Description

The VON DUPRIN PS904-2RS-FA is an access control power supply unit featuring two relay board outputs and an integrated fire alarm interface. Designed for use in commercial access control and door security systems, this power supply provides reliable, code-compliant power distribution to electrified door hardware such as electric strikes, magnetic locks, and access control panels. The fire alarm interface allows the unit to respond to fire alarm signals, enabling automatic door release or lock-down sequences depending on system configuration. Licensed security and low-voltage installers are the primary trade professionals who specify and install this unit.

This power supply is suited for commercial and institutional installations where access control hardware must integrate with a building fire alarm system. Typical applications include office buildings, schools, healthcare facilities, and multi-tenant properties where electrified door hardware requires a dedicated, regulated power source with relay switching capability. The two relay board outputs allow independent control of multiple door hardware circuits from a single supply unit.

Key Features

• Two relay board outputs for independent circuit control of electrified door hardware
• Integrated fire alarm interface for automatic door hardware response during alarm events
• Designed for commercial access control system integration
• Supports code-compliant installation where fire alarm interfacing is required
• Sold as a single unit (each)

Compatibility

Designed as an OEM-style power supply for commercial access control systems requiring relay board output switching and fire alarm interface capability.

Installation Notes

Installation should be performed by a licensed low-voltage or security systems technician familiar with access control and fire alarm integration requirements. Disconnect and de-energize all connected circuits before servicing or wiring the unit. Consult local building codes and NFPA 72 guidelines when integrating with fire alarm systems to ensure compliant installation. Verify that the power supply output ratings are compatible with all connected door hardware loads before energizing the system.