Lawrence Hardware

PS440 Series Power Supply

The PS440 power supply is a regulated, linear power supply rated at 4 Amps @ 24VDC. It’s state-of-the-art, solid-state design offers a flexible and cost effective solution to powering and controlling low current DC locking devices such as mortise locks, cylindrical locks, panic trim, and electric strikes. 

This gives the installer the flexibility to control low current and high surge current devices together with one power supply. 

The unit offers a continuous 27.6V battery charging circuit while allowing adjustable output voltage (24-27VDC). The PS440 is available in 4, 6, and 8 I/O models to accommodate most field conditions you might encounter. Housed in an attractive, high-quality enclosure, the PS440 series will be a complement to your installation while offering value not found elsewhere.


  • UL Listed
  • Adjustable output voltage from 24-27VDC 
  • Independent, Battery backup charging circuit at 27.6V with Solid-state design and very low voltage loss
  • Fire Alarm Link
  • Solid-state design eliminates mechanical problems associated with relays
  • Removable euro-style terminal blocks allow for easy wiring
  • 3-year “no hassle” warranty


  • Input voltage - 110 VAC
  • Output voltage - 24VDC @ 4A continuous current
  • Up to (8) Solid-state inputs (specify dry contact or voltage trigger)
  • Up to (8) Solid-state outputs
  • LEDs - Red = power indicator / Green = Channel on
  • Thermal auto-resettable fuses
  • Enclosure dimensions - 13” x 15.5” x 5” (accommodates two 7AH batteries - batteries not included)


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Lawrence Hardware
676 Petrolia Road, Toronto, ON M3J 2V2
Business Hours

Mon - Thur: 8:30am to 5:00pm
Fri: 8:30am to 1:00pm

Mon - Thur: 7:00am to 4:00 pm
Fri: 7:00am to 1:00pm
Shipping & pickup can be arranged based on these hours.

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