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Command Access PS220 Series 24VDC Power Supply | Backup Options
Command Access PS220 Series 24VDC Power Supply | Backup Options
$482.00
$287.70
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PS220 Power Supplies — Detailed Buyer Guide
The Command Access PS220 family supplies regulated 24VDC power for compatible electrified commercial locking hardware with 2A continuous combined output and a 3A short-duration boost, subject to the published duty-cycle and operating conditions. Select the basic PS220 where no standby backup is needed or the PS220B where battery-backup capability is specified.
Choosing PS220 Versus PS220B
The PS220 is the standard regulated 24VDC supply; the PS220B adds a battery-backup-ready configuration. Both are designed around the model family's 2A continuous rating and separately specified 3A boost function. Compare the exact power-supply enclosure and charging features before choosing a variant.
- Steady-state versus actuation: Size the connected locking devices against the continuous rating, then separately evaluate short-duration retraction or solenoid current.
- Backup: For PS220B, verify approved battery type, quantity, charging current, enclosure clearance and required standby duration. Batteries are not automatically included.
- Control wiring: Review the latest terminal diagram, output protection, required fire-alarm interface, cable size and voltage-drop limits.
- Acceptance: Test output with all intended devices connected and verify any required loss-of-power, release and standby behavior.
24VDC Power Sizing and Backup Configuration Guide
Choose a Command Access PS220 supply when the project calls for a regulated 24VDC source for compatible access-controlled door hardware. The family is described with 2A continuous output and a 3A boost capability; the boost figure is not a replacement for the continuous-duty rating. Choose PS220B when a battery-backup-ready assembly is required rather than the standard PS220 configuration.
System Design Checks
- Continuous versus peak load: Calculate the steady current draw of connected devices separately from brief startup or latch-pullback inrush. Verify whether the specific connected hardware and boost duration meet the supply manufacturer’s allowable limits.
- Wiring and output allocation: Confirm the number and rating of available output circuits, terminal arrangement, protective devices, wire gauge, voltage drop and the final electrical diagram for the selected variant.
- Battery-backup version: For PS220B, establish the required standby period, battery type and capacity, charging arrangement, installation location and inspection procedure. Do not assume batteries or extended runtime are included.
- Emergency release and controls: Check fire-alarm interface, door control sequencing, loss-of-power requirements and any electronic latch retraction loads with the hardware and life-safety specifications.
- Mounting: Verify enclosure dimensions, input power, environmental conditions, service access and electrical separation requirements prior to installation.
Acceptance and Service Tests
Verify regulated 24VDC output at working load, branch protection and correct behavior during operation of every connected lock or retraction motor. Test required release interfaces and, where applicable, the PS220B’s battery charging and power-transfer behavior. Obtain the model-specific manufacturer wiring instructions before energizing the system.
| Model | Output capacity | Control architecture | Backup configuration |
|---|---|---|---|
| PS220 | 24VDC; 2A continuous, 3A boost | Two separately controlled channels | Standard; no integrated backup |
| PS220B | 24VDC; 2A continuous, 3A boost | Two separately controlled channels | Battery backup / charging support |
Specifications and Selection Guidance
- Power input: Nominal 110–120VAC, 60Hz; verify AC input protection, grounding and enclosure requirements in the current factory cut sheet.
- Boost rating: The 3A rating is short-duration and subject to duty-cycle restrictions; it is not a continuous 3A rating for multiple devices.
- Two-channel operation: Separate input/output control channels may support compatible electric lock, latch-retraction, electric strike or maglock applications within the shared power budget.
- Backup choice: PS220B adds standby battery charging and transfer provisions. Select manufacturer-approved batteries separately and size runtime for the expected loads.
- Control integration: Verify all interfaces, input trigger wiring, protective outputs, fire-alarm integration, door-release behavior and device current draw before wiring.
- Startup requirements: Electrified devices may require more current during initial actuation; check both steady-state and inrush loading before choosing the supply.
The power supply does not include the connected electrified locks, panic devices, controller or field wiring. Follow applicable electrical and life-safety requirements during installation.
Before You Order
- Match the exact factory model and variant to the project hardware schedule; model suffixes indicate important operational differences.
- Confirm electrical supply, wiring, control interface, local codes and compatibility with the installed equipment.
- Use current manufacturer wiring diagrams, cut sheets and installation instructions; test the complete door assembly after installation.
Command Access PS220 power supply family, 24VDC 2A continuous with 3A boost, offered with or without the battery-backup configuration. Consult each model's included features and battery requirements.
Available models
- PS220 — Standard — PS220
- PS220B — Battery Backup — PS220B
Model-specific technical details and installation requirements
PS220 — Standard — PS220
The Command Access Technologies PS220 is a commercial-grade, regulated 24VDC linear power supply for compatible electrified door hardware. Providing 2A continuous combined output and a 3A short-duration boost at 20% duty cycle, it is designed to power electric locks, latch-retraction exit devices, electric strikes, electric trim and magnetic locks within the manufacturer's load limits. Two separately triggered solid-state input/output channels offer flexible control for up to two compatible locking circuits.
Important model distinction: This listing is for PS220 without battery backup. For an integrated standby battery-charging and backup version, select the separately sold PS220B. The PS220 has a compact 11" W x 11" H x 4" D metal enclosure.
Key Features and Benefits
- Regulated 24VDC output: Provides 2A continuous total rated output for compatible commercial access-control equipment.
- 3A short-duration boost: 20% duty-cycle boost for compatible motorized or solenoid latch-retraction startup demands.
- Two independently controlled circuits: Two solid-state inputs triggered by normally-open dry contacts and two associated protected outputs.
- Auto-resetting output protection: Each solid-state output is individually rated up to 1.5A; combined continuous current must not exceed 2A.
- 0.5A constant-power tap: Separate protected 24VDC accessory power connection; include accessory consumption in the total output budget.
- Fire-alarm link: Interface connection for integration with the approved fire-alarm and life-safety design.
- Diagnostic indication: AC power and DC output LED indicators simplify troubleshooting.
- Installation-ready enclosure: Compact metal cabinet with removable hingeless cover, removable Euro-style terminals and 1/2" and 3/4" conduit knockouts.
- Output protection and adjustment: Over-voltage protection, auto-resetting output circuitry and output-voltage adjustment per manufacturer instructions.
- Commercial electrical listing: Manufacturer literature identifies UL 294 Sixth Edition and Class 2 power-limited output.
Technical Specifications
| Manufacturer | Command Access Technologies |
|---|---|
| Model / Manufacturer SKU | PS220 |
| Easy Order Number | 78851 |
| Type | Regulated linear power supply, without battery backup |
| AC Input | 110-120VAC nominal, 60Hz |
| Input Fuse | 2A, 250VAC |
| DC Output | Regulated 24VDC (+/- 10% per manufacturer literature) |
| Continuous Output | 2A maximum combined |
| Short-Term Boost | 3A at 20% duty cycle |
| Control Inputs | 2 normally-open dry-contact-triggered solid-state inputs |
| Protected Outputs | 2 auto-resetting solid-state outputs, up to 1.5A individually; 2A combined |
| 24VDC Auxiliary Tap | 0.5A protected; subject to system total load rating |
| Fire Alarm Integration | Fire-alarm link |
| Backup Battery Feature | Not included on the PS220; PS220B is the separate battery-backup model |
| Enclosure Size | 11" wide x 11" high x 4" deep |
| Operating Temperature | 32-120°F (0-49°C) |
| Maximum Relative Humidity | 85% |
| Unit Weight | 10 lb |
| Shipping Weight | 11 lb; confirm actual packaged carrier weight |
Typical Applications
- Commercial electric-lock and electric-strike systems
- Compatible 24VDC motorized or solenoid latch-retraction exit devices
- Electrified exit trims, mortise or cylindrical locks and magnetic locks
- Commercial offices, education, healthcare, industrial and facility-management access-control openings
Ordering and Installation Notes
Included: One PS220 regulated 24VDC power supply inside its metal enclosure with two protected control circuits and fire-alarm link. Not included: Battery backup circuitry, standby batteries, electric locks, exit devices, access controllers, field wiring, conduit or installation labor. Select the PS220B separately when battery backup is needed. Installation and fire-alarm integration must follow the latest Command Access instructions, applicable electrical codes, approved egress design and actual connected-device current requirements.
PS220B — Battery Backup — PS220B
The Command Access Technologies PS220B Regulated Linear Power Supply with Battery Backup is a professional 24VDC access-control power supply for compatible electrified commercial door hardware. Designed to support up to two compatible electric locks, motorized or solenoid-operated latch-retraction devices, electric exit trims, electric strikes or magnetic locks, the PS220B supplies 2 amperes continuous output with a 3-amp short-duration boost (20% duty cycle). It provides two independently triggered solid-state input/output channels, integrated battery charging, a fire-alarm link and a separate 24VDC constant-power tap.
Battery-backup model: The PS220B is the battery-backup version of the PS220. It includes an automatic uninterrupted backup circuit, regulated independent battery charging and battery connection cables. The larger metal enclosure accepts two 12VDC, 7Ah batteries (not included). This listing is for the complete PS220B enclosed power supply, not the smaller non-backup PS220 or a bare replacement circuit board.
Output sizing: The PS220B's 2A continuous rating is the combined rated output, not 2A independently available on each channel. Its two auto-resetting solid-state outputs are individually protected at 1.5A each, and the constant 24VDC power tap is protected at 0.5A. According to the product installation instructions, the total combined 24VDC output current must not exceed 2A. Check the connected hardware's startup current, steady draw, surge duty cycle, power-tap load, conductor sizing and wiring distance before designing an installation.
Key Features and Benefits
- Regulated 24VDC linear power: Stable low-voltage DC output for compatible electric locks, exit devices, electric strikes, magnetic locks and access-control equipment.
- 2A continuous total rating: Supports up to 2 amperes of combined continuous 24VDC output. Use an appropriately sized supply when connected devices exceed this rating.
- 3A boost at 20% duty cycle: Designed for short-duration inrush associated with compatible motor-driven and solenoid-operated electric latch-retraction hardware.
- Two independently controlled input/output channels: Two solid-state input triggers for normally-open dry contacts and two corresponding PTC-protected 24VDC outputs.
- Two auto-resetting outputs: Each individually protected output is specified at up to 1.5A; total simultaneous output demand remains subject to the 2A overall limit.
- Constant 24VDC power tap: A separately protected 0.5A power tap for compatible constant-power accessories, subject to the aggregate power budget.
- Integrated battery backup: Automatically transfers to standby battery power when installed with the specified batteries and correctly commissioned.
- Regulated independent battery charging: Maintains compatible backup batteries and provides an uninterrupted backup circuit when properly configured.
- Battery cables included: Factory backup-circuit battery connection leads are supplied; two 12VDC 7Ah batteries are required and are sold separately.
- Fire-alarm link: Provides fire-alarm control-interface wiring described in the factory installation instructions; integrate with the approved life-safety design.
- Red, green and orange LED diagnostics: Red AC-power indicator, green DC-output/channel indicator and orange battery-output indicator for service troubleshooting.
- Euro-style removable connectors: Designed for convenient low-voltage field wiring, service and replacement within manufacturer specifications.
- Voltage adjustment and protection: Output voltage trim, overvoltage protection and auto-resetting output protection, subject to the latest product instructions.
- UL 294 Sixth Edition: Manufacturer documentation identifies the PS220B as UL 294 6th Edition listed with Class 2 power-limited output.
- Large commercial metal enclosure: Measures 13" wide x 15-1/2" high x 5" deep and has 1/2" and 3/4" conduit knockouts.
- Removable hingeless cover: Metal enclosure cover is removable; a cam lock is not supplied.
Product Specifications
| Manufacturer | Command Access Technologies |
|---|---|
| Manufacturer Part Number | PS220B |
| Shopify SKU | PS220B |
| Easy Order Number | 78852 |
| Product Category | Access control / electric door hardware power supply |
| Power Supply Design | Regulated linear DC power supply with battery backup |
| AC Input | 110-120VAC nominal; 120VAC, 60Hz |
| Input Fuse | 2A / 250VAC, 5mm x 20mm; replace only as instructed |
| Nominal DC Output | 24VDC regulated, +/- 10% according to installation literature |
| Continuous Output Rating | 2A maximum combined output current |
| Boost Output | 3A short-duration boost at 20% duty cycle; confirm approved loads |
| Input Triggers | Two independent solid-state inputs triggered by normally-open dry contacts |
| Controlled Outputs | Two protected solid-state outputs, auto-resetting, individually rated up to 1.5A |
| Total Output Current Limit | Combined output current must not exceed 2A |
| 24VDC Constant Power Tap | 0.5A resettable protected tap; include accessory draw in total output budget |
| Battery Backup | Integrated automatic uninterrupted transfer and independent charging circuit |
| Required Batteries | Two 12VDC 7Ah batteries, not included |
| Battery Connection Cables | Included per manufacturer specifications |
| Fire-Alarm Interface | Factory fire-alarm link; follow published wiring instructions |
| Diagnostic LEDs | Red: AC power; green: DC output; orange: battery output |
| Output Voltage Trim | Adjustable, per manufacturer's instructions |
| Output Protection | Two PTC-protected / auto-resetting outputs; overvoltage protection |
| Electrical Listing | UL 294 Sixth Edition; Class 2 rated power-limited output according to factory literature |
| Enclosure Material | Metal with removable hingeless cover, cam lock not included |
| Enclosure Dimensions | 13" W x 15-1/2" H x 5" D |
| Conduit Knockouts | 1/2" and 3/4" sizes, located on enclosure sides |
| Operating Temperature | 32-120 degrees F (0-49 degrees C) |
| Maximum Relative Humidity | 85%, per manufacturer specification |
| Product Weight | 14 lb (supplier specification) |
| Shipping Weight | 15 lb (supplier shipment weight; verify actual packed carrier weight) |
Common Commercial Applications
- Power supplies for two independently triggered compatible commercial electric-locking circuits
- Motorized latch-retraction panic exit devices and low-current solenoid exit trim
- Compatible electrified mortise and cylindrical locksets
- Electric strikes and magnetic locks with compatible 24VDC voltage and current specifications
- Commercial office, institutional, educational, healthcare and facility-management access-control installations
- Projects needing a protected fire-alarm link and automatic backup power during AC service interruptions
PS220B Versus PS220 and PS210
PS220B has 2A continuous output, 3A short-duration boost, two independent input/output channels, a 0.5A protected constant-power tap and integrated battery backup in the 13" x 15-1/2" x 5" large enclosure. The otherwise similar PS220 does not include the battery-backup circuitry and uses a smaller enclosure. The PS210 has 1.5A continuous output and one input/output channel with no integrated battery-backup circuit. These models are not interchangeable without verifying electrical design and hardware requirements.
Ordering and Installation Checklist
- Confirm the correct product: Specify PS220B with battery-backup circuitry, rather than PS220 without backup or PS210 with a single channel.
- Install standby batteries: Order two separate 12VDC 7Ah batteries; the power supply includes battery charging circuitry and connection cables, but does not include the batteries.
- Verify branch circuit: A qualified installer should supply 120VAC/60Hz mains power in compliant conduit with correct overcurrent protection, grounding and separation.
- Calculate total system load: Do not exceed 2A combined continuous output or individual protected output limits; include power-tap draw and factor in the 3A 20% duty-cycle boost for compatible momentary loads.
- Plan controls: Two normally-open dry-contact triggers control two channels; match the current wiring diagram for door control relays, access systems and egress devices.
- Implement fire-alarm wiring: Follow the manufacturer's FIRE terminal wiring guide and local approved life-safety plan; the normal factory jumper must be handled correctly if connecting an external fire-alarm relay.
- Size and route field wires: Consider lock inrush/holding current, distance, voltage drop and wire gauge; do not put mains AC on low-voltage control terminals.
- Mount in a protected location: Ensure access to diagnostic indicators, service clearance and enclosure dimensions with appropriate knockout use.
- Commission and test: Test channel activation, regulated DC output, fire-alarm behavior, loss-of-AC backup transfer, battery charging and restoration under expected load.
What's Included
One Command Access PS220B regulated 24VDC, 2A continuous / 3A boost linear power supply in a large metal enclosure with two solid-state input/output channels, fire-alarm link and integrated battery-backup charger with battery connection cables. Verify mounting accessories and current package contents at purchase.
Not Included
Two required 12VDC 7Ah backup batteries are not included. Electric locks, panic exit devices, electric strikes, maglocks, access-control controllers, field wiring, conduit, enclosure cam lock and installation labor are sold separately. This listing is for the PS220B enclosed power supply only.
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