The Schlage PS902 Power Supply is a reliable and versatile low-voltage power solution engineered to meet the evolving demands of modern access control systems. Designed for seamless integration with electrified hardware such as electric strikes, magnetic locks, card readers, and other security devices, the PS902 delivers dependable regulated power in a compact and installer-friendly design.

Built with convenience in mind, the PS902 features a flat mounting layout and polarized locking connectors that simplify installation while eliminating the need for racks and side connectors. Its accessible terminal blocks allow for easier wiring and maintenance, making it ideal for commercial, institutional, and high-security applications.

The PS902 provides a constant 2A output at both 12VDC and 24VDC, field selectable via jumper, ensuring flexibility across a wide range of electronic locking systems. Universal 120–240 VAC input compatibility makes it suitable for installations worldwide, while integrated monitoring circuits with LED indicators provide instant visual status for AC input and DC output conditions.

For enhanced safety and system integration, the PS902 supports optional fire alarm interface boards that allow outputs to be configured as switched or unswitched during alarm conditions. Additional features such as battery backup auto-voltage selection, isolated SPDT contacts, and high-voltage protective covers further improve reliability and protection.

Features & Benefits

• 2A constant output at 12VDC or 24VDC
• Field-selectable voltage via jumper
• Filtered and regulated Class 2 low-voltage power
• Universal 120–240 VAC fused primary input
• Flat mounting design for simplified installation
• Polarized locking connectors for option boards
• LED indicators for AC input and DC output monitoring
• Externally visible AC input indicator with isolated SPDT contacts
• Optional fire alarm interface board compatibility
• Auto-selecting battery backup board voltage
• High-voltage protective cover for added safety
• UL 294, ULC-S318, RoHS, and FCC Part 15 certified

Perfect for access control and electronic security systems, the Schlage PS902 Power Supply delivers dependable performance, flexible configuration options, and simplified installation for professional-grade security applications.

Model

• PS902: 2 amp Class 2 filtered and regulated power limited output

Input voltage

• 120/240 VAC, 50/60 Hz, universal input

Output voltage

• 12 or 24 VDC field selectable with jumper
• Switching supply, 5% regulation, 240Vpp max ripple
• DC output overload protection: current limited fold back circuit

Option boards

• 900-BB: Battery backup option board (installs on main board)
• 900-BBK: Battery backup kit (includes option board and two 7A/hour batteries)
• 900-FA: Emergency interface/fire alarm plug-in (integrates with fire alarm and is used to cut power in case of emergency).  Install on main or option board
• 900-2RS: 2 relay option board capable of individual or sequential operation for single and pair door applications
• 900-4R: 4 relay board; independently controlled, no timing or logic 
• 900-4RL: 4 relay board with integrated logic; field programmable; individual or sequential operation for controlling security interlocks, auto operators, and time delay function
• 900-8F: 8 individually fuse protected outputs, giving the flexibility to power multiple devices and provides another layer of protection
• 900-8P: 8 PTC protected outputs with auto resettable fuses; 1.8A output (class 2)
• 900-KL: Key lock cover
• Option board connectors: 1 (see Configuration Options)

Operating temperature

• 32° to 120° F (0° to 49°C)

Fuse size

• AC primary: T3.15A, 250VAC, 5 x 20mm
• Battery: 7.5A 32v ATO blade style

Cabinet

• 14"H x 12"W x 4"D in grey, baked enamel finish
• Hinged cover with lockdown screws and optional key lock
• NEMA Grade 1
• Weight: 9lbs., add 4lbs. for each battery