{"product_id":"command-access-ps440b-24vdc-4a-power-supply-with-battery-backup-4-outputs","title":"Command Access PS440B 24VDC 4A Power Supply with Battery Backup | 4 Outputs","description":"\u003cp\u003eThe \u003cstrong\u003eCommand Access Technologies PS440B\u003c\/strong\u003e is a \u003cstrong\u003eregulated 24VDC linear power supply with battery-backup capability\u003c\/strong\u003e, engineered for electrified commercial door hardware and access-control systems. It provides \u003cstrong\u003e4A continuous combined output\u003c\/strong\u003e plus a \u003cstrong\u003e6A short-duration boost at a 20% duty cycle\u003c\/strong\u003e to handle the initial inrush requirements of compatible solenoid and motor-driven latch-retraction devices. Four independent solid-state control inputs operate four individually protected outputs.\u003c\/p\u003e\u003ch3\u003eFour-Output Supply and Battery Planning\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003ePS440B\u003c\/strong\u003e distributes regulated \u003cstrong\u003e24VDC\u003c\/strong\u003e power from a \u003cstrong\u003e4A combined continuous\u003c\/strong\u003e source across four protected output channels. Its specified \u003cstrong\u003e6A boost\u003c\/strong\u003e function is intended for approved short-duration demand, not continuous loading. Each channel does not provide an independent 4A budget.\u003c\/p\u003e\u003ch4\u003eBefore Ordering and Installing\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCalculate aggregate current for all connected locks, solenoids, relays and controllers, including simultaneous operation and cable voltage drop.\u003c\/li\u003e\n\u003cli\u003eConfirm branch\/output protection, source power, terminal diagrams and any fire-alarm interface requirements against the manufacturer's current wiring instructions.\u003c\/li\u003e\n\u003cli\u003eFor battery backup, verify supported battery type, capacity, quantity, charger requirements and anticipated standby time; backup batteries are not included by default.\u003c\/li\u003e\n\u003cli\u003eEnsure enclosure access, heat clearance, service wiring, separation and listing requirements are met, then test each output under actual operating conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePS440B battery-backup version:\u003c\/strong\u003e A built-in independent, regulated battery charger and automatic uninterrupted backup circuit support standby operation. The enclosure accommodates \u003cstrong\u003etwo 12VDC 7Ah batteries (not included)\u003c\/strong\u003e, and battery connection cables are supplied. This is the \u003cstrong\u003efour-output PS440B\u003c\/strong\u003e; the separate PS480B model provides eight outputs.\u003c\/p\u003e\n\u003ch3\u003eKey Features and Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRegulated 24VDC linear power:\u003c\/strong\u003e 4A continuous combined output, designed for compatible electrified locks, electric strikes, maglocks and exit devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6A surge capability:\u003c\/strong\u003e Short-duration boost at 20% duty cycle for compatible motorized and solenoid latch-pullback hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour independent control channels:\u003c\/strong\u003e Four normally-open dry-contact-triggered solid-state inputs and four matching 24VDC outputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndividually protected circuits:\u003c\/strong\u003e Four auto-resetting 1.5A PTC-fused outputs; total continuous demand across all outputs must not exceed 4A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated battery backup:\u003c\/strong\u003e Automatic uninterrupted backup transfer, independent battery charging and included battery connection cables; two batteries are required but sold separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire-alarm link:\u003c\/strong\u003e Connection for approved fire-alarm and access-control safety integration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid-state relay protection:\u003c\/strong\u003e Over-voltage protection and circuit design intended to protect connected control relays from shorts, grounds and surges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy maintenance:\u003c\/strong\u003e Removable Euro-style wire connectors, output-voltage adjustment and red\/green\/orange diagnostic indicators.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommercial-grade metal cabinet:\u003c\/strong\u003e 13\" wide x 15-1\/2\" high x 5\" deep, with 1\/2\" and 3\/4\" knockouts on all sides and a removable hingeless cover.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety listing:\u003c\/strong\u003e Identified in manufacturer documentation as UL 294 Sixth Edition and Class 2 power-limited.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003eCommand Access Technologies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer Part Number \/ SKU\u003c\/th\u003e\n\u003ctd\u003ePS440B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eRegulated linear power supply with battery backup\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAC Input\u003c\/th\u003e\n\u003ctd\u003e120VAC \/ 60Hz (110–120VAC nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInput Fuse\u003c\/th\u003e\n\u003ctd\u003e2A, 250VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRegulated DC Output\u003c\/th\u003e\n\u003ctd\u003e24VDC, ±10%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eContinuous Power\u003c\/th\u003e\n\u003ctd\u003e4A combined maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShort-Duration Boost\u003c\/th\u003e\n\u003ctd\u003e6A at 20% duty cycle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eControl Channels\u003c\/th\u003e\n\u003ctd\u003e4 independently triggered solid-state inputs and outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIndividual Output Protection\u003c\/th\u003e\n\u003ctd\u003e4 auto-resetting fused outputs, rated 1.5A each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBattery Backup\u003c\/th\u003e\n\u003ctd\u003eAutomatic uninterrupted transfer; independent regulated charging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRequired Backup Batteries\u003c\/th\u003e\n\u003ctd\u003e2 x 12VDC 7Ah batteries; sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBattery Cables\u003c\/th\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFire-Alarm Interface\u003c\/th\u003e\n\u003ctd\u003eFire-alarm link\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput Adjustment\u003c\/th\u003e\n\u003ctd\u003eVoltage trim potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiagnostic LEDs\u003c\/th\u003e\n\u003ctd\u003eRed AC power, green DC output, orange battery output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEnclosure Size\u003c\/th\u003e\n\u003ctd\u003e13\" W x 15-1\/2\" H x 5\" D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEnclosure Features\u003c\/th\u003e\n\u003ctd\u003eMetal cabinet, removable hingeless cover; 1\/2\" and 3\/4\" conduit knockouts; cam lock not supplied\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003e32–120°F (0–49°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Relative Humidity\u003c\/th\u003e\n\u003ctd\u003e85%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Weight\u003c\/th\u003e\n\u003ctd\u003e14 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eListing\u003c\/th\u003e\n\u003ctd\u003eUL 294 Sixth Edition, Class 2 power-limited output per manufacturer documentation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eCommon Commercial Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUp to four separately triggered circuits for compatible electric locks, mortise locks and cylindrical locksets\u003c\/li\u003e\n\u003cli\u003eCompatible 24VDC motor-driven and solenoid-operated latch-retraction panic or exit devices\u003c\/li\u003e\n\u003cli\u003eCommercial electric strikes, electrified exit trim and magnetic locks\u003c\/li\u003e\n\u003cli\u003eDoor access-control systems requiring a regulated power source and battery-backup support\u003c\/li\u003e\n\u003cli\u003eInstitutional, industrial, medical, educational and commercial-building openings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003eOne \u003cstrong\u003eCommand Access PS440B\u003c\/strong\u003e 24VDC 4A linear power supply installed in a large metal enclosure, with four independently triggered protected outputs, fire-alarm link, integrated battery charger, automatic backup circuitry and battery connection cables.\u003c\/p\u003e\n\u003ch3\u003eNot Included \/ Installation Notes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTwo 12VDC 7Ah backup batteries are required for standby operation and are not included.\u003c\/strong\u003e Electric locks, exit devices, access-control panels, field wiring, conduit, cam lock and installation labor are also sold separately. Verify actual connected loads, 1.5A per-output protection, 4A total continuous capacity, surge duty cycle, battery runtime, fire-alarm wiring and applicable building or life-safety requirements. Installation must follow the current Command Access instructions and applicable electrical codes.\u003c\/p\u003e","brand":"Command Access Technologies","offers":[{"title":"Default","offer_id":68030687412439,"sku":"PS440B","price":380.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/4933\/1927\/files\/bcbb3de8-7ab7-41ce-8e05-b5e9dfd94968_PS440B-480B-Power-Supply.jpg?v=1794340500","url":"https:\/\/shop.commercialdoorworx.com\/products\/command-access-ps440b-24vdc-4a-power-supply-with-battery-backup-4-outputs","provider":"Commercial Door Worx","version":"1.0","type":"link"}