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PS902 Power Supplies

The Schlage PS902 2-amp power supply is designed to deliver a highly filtered and regulated "clean" output to protect downstream devices. The PS902 is factory and field configurable to suit specific needs. Separate battery management extends battery life and ensures consistemt output.


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The Schlage PS902 is a 2-amp power supply that offers a high degree of configurability to address the changing needs of the electronic access control market. Designed with versatility and reliability in mind, the PS902 can be factory ordered to meet specific needs or configured in-field using a wide selection of option boards. Their use of separate battery management ensures tight output power regulation to protect downstream devices. 

Installation is simple with a flat mounting board and polarized locking connectors to make in-field expansions virtually plug-and-play. The design also provides easier access to the terminal blocks for connection of electrified devices, such as electric strikes, mag locks and card readers. 

 Dual Voltage 12/24 VDC

 Field Configurable


 Status Indicator

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Power Supplies

For frequently asked questions, educational resources and technical product materials visit the Power Supplies 101 page. 


  • 2 amp
  • Clean, consistent power output helps protect the sensitive circuitry of downstream products
  • Overload protection prevents too much current being pulled by an overload of devices
  • 12/24 VDC output field selectable with plug-in jumper
  • Externally visible LED indicator provides visual status on AC input 
  • Ability to provide continual power with battery backup



  • Universal 120-240 VAC, fused primary input
  • Externally visible AC input indicator with isolated SPDT contacts
  • Battery back-up board auto-selects voltage
  • LED indicator provides visual status on DC output



  • Order to specification or field configure; option boards use polarized plug-in connectors to simplify in-field expansions
  • Option boards enable basic fuse protection, simple relay, advanced logic with sequencing and timing, panic device control, fire alarm relay and battery backup 
  • Cabinet accommodates 2 batteries and up to 2 option boards, plus fire alarm relay and battery backup boards; see Configuration options for details


  • 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



  • 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


Additional information

  • Please refer to the PS902 data sheet
  • The Von Duprin PS914 power supply is designed for high in-rush applications
  • UL 294 for access control
  • ULC-S318
  • RoHS
  • FCC Part 15 
  • Class 2
  • Von Duprin QEL - Up to 2*
  • Von Duprin EL - None (see Von Duprin PS914)
  • Falcon EL - None (see Von Duprin PS914)
  • Falcon MEL - up to 2*


* Requires the use of one 900-2RS option board

One fire alarm board can be connected directly to the PS902.

Please refer to page two of the PS902 data sheet for an image with additional configuration details.

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Did You Know?

Carrying on the legacy of the groundbreaking push-button lock, Schlage changed the game again with its descendent in 2019—the ALX Series. This series features a patent-pending chassis and revolutionary new modular design.

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As part of Allegion’s family of pioneering brands, Schlage benefits from the strength, efficiencies, resources, and integration from a global power. In turn, we pass those advantages on to you.

Allegion helps keep people safe and secure where they live, work and visit. With more than 30 brands sold worldwide, we specialize in security around the doorway and beyond. It’s the power of one.