Command Access PS440B/480B UL ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$495.00
$362.00
Command Access Command Access PS440B/480B UL 6E/CSA Linear with 4 or 8-I/0 Power Supply CAT PS440B

Command Access PS440B/480B UL 6E/CSA Linear Power Supply with 4 or 8 I/O and Battery Backup

(No reviews yet) Write a Review

Model: PS440B

In Stock (leaves warehouse same day if ordered before 3pm ET)

$495.00
$362.00
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Command Access PS440B/480B UL 6E/CSA Linear Power Supply with 4 or 8 I/O and Battery Backup

Professional Linear Power Supply for Electronic Access Control Systems

The Command Access PS440B/480B series delivers reliable 4 amp @ 24VDC power with 110-120VAC input for electronic access control applications. Available in 4 I/O (PS440B) or 8 I/O (PS480B) configurations, these linear power supplies feature PTC fused outputs and solid-state input triggers that protect system relays from shorts, grounds, and surges. The compact 13" W x 15.5" H x 5" D enclosure accommodates (2) 12VDC 7AH batteries for uninterrupted backup power.

Professional Features & Benefits

  • Linear Design Performance: Ensures ample inrush/hold current for reliable latch retraction in solenoid and motor driven exit devices, electric locks, electric strikes, and mag locks.
  • Dual Configuration Options: PS440B provides 4 solid-state I/O’s while PS480B offers 8 I/O’s, both with 1.5A auto-resetting fused outputs for flexible system design.
  • Comprehensive Power Protection: Over-voltage protection and output voltage trim pot ensure stable power delivery while protecting connected devices from electrical surges.
  • Visual Status Monitoring: LED indicators provide clear status feedback - Red for A/C Power, Green for D/C Output, and Orange for Battery Output operation.
  • Battery Backup System: Regulated, independent battery charging with automatic uninterrupted backup circuit accommodates (2) 12VDC 7AH batteries with included cables.
  • Professional Installation Features: Easy-to-remove euro connectors, door mounted LED power indicator, and 1/2" & 3/4" knockouts on all sides for versatile mounting options.
  • Robust Environmental Rating: Operating temperature range of 0 to 49°C (32 to 120°F) with maximum 85% humidity for reliable performance in various conditions.

Technical Specifications

  • Battery Operated: Yes
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Product Category: Electronic Access Controls
  • Product Group: Electronic Access Controls
  • Product Subgroup: Power Supplies
  • Product Type: Power Supplies
  • Series: PS440B Series
  • Subcategory: Power Supply

Professional Applications

  • Commercial Building Security Systems
  • Electronic Access Control Installations
  • Exit Device Power Management
  • Electric Strike and Mag Lock Systems
  • Multi-Door Access Control Networks
  • Emergency Backup Power Applications
  • Industrial Facility Security Systems

Why Choose Command Access Quality?

Command Access PS440B/480B power supplies deliver professional-grade reliability with linear design technology and comprehensive protection features. The robust enclosure design with hinge-less removable cover and multiple knockout options ensures versatile installation capabilities. Engineered for demanding commercial applications where dependable power delivery and system protection are essential.

Manufacturer Resources

Command Access Catalog

Product Specs

Product Group:
Electronic Access Controls
Series:
PS440B Series
Subcategory:
Power Supply
Commercial/Residential:
Commercial
Product Type:
Power Supplies
Battery Operated:
Yes
Product Subgroup:
Power Supplies
Product Category:
Electronic Access Controls
Department:
Door Hardware

Command Access PS440B – Frequently Asked Questions

1) What is the difference between the PS440B and the PS480B?
Input count, and nothing else in the power section. The PS440B gives you 4 solid-state I/O's, the PS480B gives you 8. Both are the same 4 amp 24VDC linear supply with battery backup, and both run 1.5A auto-resetting fused outputs. Count your doors and your trigger inputs first: four openings on one board means the PS440B, anything beyond that goes to the PS480B rather than a second cabinet.
2) Will the PS440B enclosure fit batteries, and what size do I need to buy?
The cabinet takes two 12VDC 7AH batteries and the battery cables come with it. The enclosure measures 13 x 15.5 x 5 inches (W x H x D), sized to hold the pair inside. Batteries themselves are the one thing you add to the order; wire them in series for the 24VDC backup and the changeover circuit takes over with no drop.
3) Can I set the PS440B to 12VDC for 12 volt strikes?
No. The PS440B/480B is a 24VDC supply at 4 amps, not a field-selectable dual-voltage unit. If your hardware is 12 volt, look at a dual-voltage supply instead: the Securitron AQL4 is a 12/24VDC switching supply at 4/3 amps, and the SDC 634 Series is a 4 amp regulated supply with dual voltage selection. Where you are mixing 12 volt strikes with 24 volt latch retraction on the same job, most techs run two supplies rather than trying to make one cover both.
4) I need more than 4 amps at 24 volts for a bank of doors. What should I look at instead of the PS440B?
The PS440B/480B tops out at 4 amps at 24VDC, which is the ceiling on how many devices you can hang off one cabinet. For a larger door count, the Altronix AL1024ULACMCB is a power supply and access power controller with 8 PTC outputs at 24VDC and 10 amps from a 115VAC 60Hz input, and the BEST PS161-6 is a 6 amp 120V unit with 12/24V output built for delayed egress exit devices. Both are steps up in capacity from a single PS480B.
5) Which power supply should I choose for motorized latch retraction exit devices, the PS440B or the BEST RPSMLR2?
The BEST RPSMLR2 Series is a power supply built specifically for motorized latch retraction exit devices. The Command Access PS440B/480B addresses the same load with a linear design that supplies the inrush and hold current for latch retraction in both solenoid and motor driven exit devices, and it also feeds electric locks, electric strikes and mag locks from the same enclosure, with 4 or 8 solid state I/O's and 1.5A auto resetting fused outputs. If the opening is exclusively motorized latch retraction, the RPSMLR2 is purpose built for it; if the panel also has to run strikes or mag locks on separate triggered outputs, the PS440B/480B covers the mixed load.
6) What is the closest 4 amp equivalent to a Command Access PS440B power supply?
The SDC 634 Series is a 4 amp regulated and filtered low voltage power supply with dual voltage selection, matching the PS440B/480B on 4 amp output. The Securitron AQL4 is also a 4 amp unit, rated 12/24VDC at 4/3 amp, though it is a switching design rather than the linear design the PS440B/480B uses. Command Access builds the PS440B/480B as a linear supply specifically to deliver the inrush and hold current that solenoid and motor driven latch retraction exit devices draw, and it accepts (2) 12VDC 7AH batteries for backup, which the 634 and AQL4 descriptions do not cover.
7) I only need to power one electric strike. Is there a smaller power supply than the PS440B?
Yes. For a single low draw device, the SDC 620 Series is a 1 amp regulated and filtered low voltage supply with dual voltage selection, and the Adams Rite PS-1 is a 1 amp 12/24 volt DC regulated supply with battery backup. The SDC 631 Series steps up to 1.5 amp and the SDC 632 Series to 2 amp. The Command Access PS440B/480B is sized differently: 4 amp at 24VDC with 4 or 8 solid state I/O's, which is what a multi door network with several triggered outputs needs.
8) What is the difference between the Command Access PS480B and the RCI DKPS-2A for a multi door access control panel?
Both are multi output panels. The RCI DKPS-2A provides 8 outputs at 12/24VDC and 2 amps for access control systems. The Command Access PS480B also gives 8 solid state I/O's, but at 4 amp @ 24VDC with 1.5A auto resetting fused outputs, plus room in the 13 inch W x 15.5 inch H x 5 inch D enclosure for (2) 12VDC 7AH batteries. If the panel needs 12 volt output the DKPS-2A selects between 12 and 24VDC; the PS440B/480B is a 24VDC supply.
9) I need a 12 volt power supply for access control. Will the Command Access PS440B work?
The Command Access PS440B/480B is a 4 amp @ 24VDC supply, so a 12 volt device needs a different unit. The Securitron AQD1 is a 12/24 VDC 1 amp switching supply, the Aiphone AC-PS1250 is a UL listed 12V DC 5A supply for AC Series access control kits, and the ROFU 9102-12D UL / 9102-24D takes 10/120VAC 60Hz input and is offered in a 12 volt version. The ROFU 9126T is a plug in mini supply at 12 VDC / 1.5A with a built in time delay for a single door.
10) Can I mount a Command Access PS440B in an electrical room with conduit coming in from the top?
Yes. The enclosure carries 1/2 inch and 3/4 inch knockouts on all sides, so you can bring conduit in from whichever direction the run lands. The cover is hinge-less and lifts off, which makes terminating easier in a tight closet, and the field connections are euro-style plug connectors you can pull rather than re-landing wire. There is also a door mounted LED power indicator so a tech can confirm A/C without opening the can.
11) Can the PS440B be installed in an unconditioned space like a parking garage or a rooftop penthouse?
Its rated operating range is 0 to 49 degrees C (32 to 120 degrees F) at up to 85 percent humidity. That covers a warm mechanical room or an interior garage level, but not a space that drops below freezing or takes direct weather. Note also that lead-acid backup batteries lose capacity in the cold, so a marginal-temperature location shortens your runtime even when the supply itself is inside its range.
12) Will a short on one door take down the whole access control panel?
No. Each output on the PS440B/480B is PTC fused at 1.5A and auto-resets, so a shorted lock or a pinched wire on one opening trips only that output and clears itself once the fault is cleared. The inputs are solid-state triggers rather than mechanical relays, which is what protects the board from shorts, grounds and surges coming back down a run. Over-voltage protection sits on the supply side as well.
13) How is a linear power supply different from a switching power supply for access control?
A switching supply is smaller and lighter and is fine for steady loads like mag locks or card readers. A linear supply, which is what the PS440B/480B is, carries the surge current that a motor or solenoid latch retraction device pulls the instant it fires, so the device actually retracts instead of browning out the bus. If your load is all mag locks, a switching unit such as the Securitron AQS1210 or the AQL4 will do it. If there is an electrified exit device on the job, buy linear.
14) Is there a smaller Command Access alternative if I only have one door and a single strike?
The PS440B/480B is a 4 amp cabinet with battery backup and four to eight I/O's, which is more supply than one strike needs. For a single low-current opening, smaller regulated units cover it: the SDC 620 Series is a 1 amp dual-voltage supply, the SDC 631 Series is 1.5 amps, and the ROFU 9126T is a plug-in mini supply at 12VDC 1.5A with time delay. Step back up to the PS440B when you add a motorized latch retraction device or need battery backup on the opening.
15) Is the ROFU 10305-LA a substitute for a Command Access PS440B?
No. The ROFU 10305-LA/10306-LA is a tamper resistant power transfer hinge rated 1.5A at 42V in a plastic white finish - it carries power through the door edge from the frame to the leaf. It has no AC input, no outputs and no battery. The Command Access PS440B/480B is the source of the power itself, taking 110-120VAC in and delivering 4 amp at 24VDC with battery backup. On a job with an electrified lock you would commonly need both, not one or the other.
16) Which access control power supplies include battery backup besides the Command Access PS440B?
The Adams Rite PS-1 is a 1 amp 12/24 volt DC regulated supply with battery backup, and the Detex 10-800 Series pairs a universal logic controller with a 120VAC/24VDC power supply and battery backup. The Command Access PS440B/480B carries regulated, independent battery charging with an automatic uninterrupted backup circuit and takes (2) 12VDC 7AH batteries with the cables included. The Detex unit differs in that it bundles logic control with the supply, while the PS440B/480B is the power source with 4 or 8 solid state input triggers.
17) Is the BEST ELR150 an alternative to the Command Access PS440B?
They fill different roles on the same panel. The BEST ELR150 Series is a power supply control module for electronic access control - a control module rather than a complete supply with its own enclosure and AC input. The Command Access PS440B/480B is the full unit: 110-120VAC input, 4 amp @ 24VDC output, 4 or 8 solid state I/O's, and a 13 inch W x 15.5 inch H x 5 inch D enclosure with knockouts on all sides and space for two backup batteries.
18) What power supply works for a door where no AC power is available?
The Securitron BPSS is a boxed solar power supply, which is the option when there is no line voltage at the opening. The Command Access PS440B/480B requires a 110-120VAC input and is mounted in a 13 inch W x 15.5 inch H x 5 inch D enclosure with 1/2 inch and 3/4 inch knockouts on all sides; its (2) 12VDC 7AH batteries are backup for an AC outage, not a substitute for an AC feed.
19) What do the LED colors on the Command Access PS440B mean?
Three indicators, and reading them tells you where a dead door actually is. Red means A/C power is present. Green means D/C output is live. Orange means the unit has dropped to battery output, so utility power is gone or the transformer side has failed. Orange with no red on a service call is a building power or input problem, not a lock problem.
20) Can I trim the output voltage on the PS440B if my lock is seeing low voltage at the end of a long run?
There is an output voltage trim pot on the board, so you can bring the output up to compensate for drop on a long home run. Set it with the load energized and measure at the device, not at the cabinet. Over-voltage protection stays in circuit while you adjust.
21) Is the Command Access PS440B suitable for a commercial building, or is it a residential unit?
It is a commercial-duty product, built for multi-door access control networks, exit device power management, electric strike and mag lock systems, and industrial facility security. The 4 amp 24VDC linear output with two-battery backup and four or eight supervised I/O's is sized for a building, not a house.
How fast can I get the Command Access PS440B delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Command Access PS440B come with a warranty?
Absolutely. The Command Access PS440B is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Command Access PS440B?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Command Access PS440B from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!