The Command Access Technologies PS480B is a professional regulated 24VDC linear access-control power supply with integrated battery backup. It provides up to 4A combined continuous output, with 6A short-duration boost at 20% duty cycle, for compatible electric locking hardware. Designed for commercial and institutional installations, the PS480B includes eight independent solid-state input/output channels, eight PTC-protected output circuits and a dedicated fire-alarm link.

Eight-Output Power Distribution for Access-Control Systems

The PS480B offers eight protected output channels powered by a 24VDC, 4A combined continuous regulated supply, with a separately rated 6A short-duration boost capability. Eight outputs do not mean eight independent 4A supplies; budget all connected loads together.

System Design and Battery Planning

• Connected loads: Calculate electric lock, exit-device, relay and controller current under normal and simultaneous activation, including cable voltage drop.
• Output wiring: Match controlled circuits to the appropriate channel and follow the current manufacturer's protection, wiring and fire-alarm interface documentation.
• Backup: Establish the project standby duration, supported battery chemistry/capacity, charger restrictions and enclosure requirements; batteries are separate unless specifically included.
• Verification: Test all eight outputs, under-load voltage, required alarm release functions, fault indications, loss-of-power response and approved battery transfer.

Battery-backup model: The PS480B includes integrated regulated battery charging, automatic uninterrupted transfer to standby power and connection leads. The large metal enclosure accommodates two 12VDC, 7Ah backup batteries (not included). The related PS440B provides four channels, while the PS480B provides eight.

Key Features and Benefits

• Regulated 24VDC linear output: Supplies up to 4A total continuous current for compatible commercial access-control and electrified door hardware.
• Eight independent control channels: Eight solid-state inputs and eight corresponding 24VDC PTC-protected outputs support control of multiple compatible devices.
• 6A short-term boost: Provides momentary inrush capability at 20% duty cycle for compatible solenoid-driven and motorized latch-retraction exit devices.
• Auto-resetting output protection: Each output is individually protected by a 0.75A PTC; combined continuous output remains limited to 4A.
• Integrated battery-backup circuitry: Automatic uninterrupted backup transfer and independent regulated charging, using two separately purchased 12VDC 7Ah batteries.
• Fire-alarm interface: Dedicated link for approved fire-alarm and life-safety access-control integration.
• Solid-state circuit design: Helps protect system relays against shorts, grounds and surges, with overvoltage protection and intelligent short-circuit detection.
• Installation and maintenance: Easy-to-remove Euro-style connectors, output-voltage trim potentiometer and diagnostic power indicators.
• Commercial metal cabinet: Large enclosure with removable hingeless cover and standard conduit knockouts.
• UL 294 Sixth Edition: Access-control power supply listed according to published Command Access product documentation.

Technical Specifications

Typical Commercial Applications

• Access-control projects requiring up to eight independently triggered compatible electrified locking circuits
• Compatible 24VDC motorized or solenoid latch-retraction exit devices and panic hardware
• Electric strikes, electrified mortise or cylindrical locks, exit trims and magnetic locks
• Institutional, healthcare, education, industrial and commercial-building entrance systems
• Door hardware projects needing a fire-alarm link and standby battery support

What's Included

One Command Access PS480B regulated 24VDC power supply in a large metal enclosure with eight protected input/output circuits, fire-alarm link, integrated battery charger, automatic backup-transfer circuitry and battery connection cables. Verify the latest factory package contents at purchase.

Not Included / Installation Checklist

Two 12VDC, 7Ah standby batteries are not included. Electrified locking hardware, access-control equipment, field wiring, conduit, cabinet cam lock and installation labor are also sold separately. Before installation, calculate both the total 4A combined continuous load and the 0.75A per-output limit, confirm inrush/boost duty requirements, determine battery runtime and verify wiring distance and fire-alarm operation with the current Command Access instructions and applicable life-safety codes.