- Manufacturer and part number on the existing component
- Door or operator model, plus size and finish where applicable
- Mounting style, handedness, and electrical specifications when relevant
Replacement part details
Check the specifications below for compatibility, then confirm your original part number and equipment details before ordering. Contact our parts team if you need help.
Command Access 24VDC Power Supply Replacement Board | 2A Dual Output
Command Access 24VDC Power Supply Replacement Board | 2A Dual Output
$400.00
$280.00
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The Command Access Technologies PS2-BO Regulated Power Supply Board is a board-only replacement for compatible commercial electric latch-pullback and access-control systems. Designed as a replacement for the discontinued Von Duprin PS873-2 power-supply board, the PS2-BO provides regulated 24VDC output rated at 2A, built-in boost circuitry, two independently triggered solid-state input/output circuits and a fire-alarm disconnect link.
Replacement Board versus Complete Power Supply
The PS2-BO is a board-only replacement assembly designed for compatible Von Duprin PS873-2 power-supply applications. It is not a complete enclosed unit and does not include a battery charging circuit or backup battery system.
- Retrofit verification: Compare the existing board, cabinet, supply wiring, connector/terminal arrangement, power distribution and downstream control channels to the current Command Access replacement documentation.
- Electrical rating: Confirm the regulated 24VDC/2A output against the connected devices' continuous and inrush requirements. The two control channels share the rated source.
- Life-safety controls: Recheck any required fire-alarm interface, door release sequence and applicable exit-device wiring before returning the system to service.
- Qualified installation: Disconnect and secure the AC feed before board service and use the manufacturer’s wiring and mounting instructions; enclosure and field electrical work are separate.
Important: The PS2-BO is a replacement power-supply board assembly, not a complete power supply in an enclosure. A metal enclosure and battery-backup charging circuitry are not included. The battery-backup-equipped PS2BB-BO is a separate model and should not be substituted without verifying compatibility.
Key Features and Benefits
- Regulated 24VDC power: Supplies up to 2A total output for compatible electric latch-retraction exit devices and commercial electrified locking hardware.
- Replacement for legacy hardware: Designed to replace the discontinued Von Duprin PS873-2 power supply board in a compatible installation.
- Two independent control channels: Two solid-state inputs and corresponding outputs support independent electric latch-pullback activation, subject to manufacturer wiring requirements.
- Boost circuitry: Provides additional momentary inrush current needed by compatible electric latch pullback systems; verify load and duty-cycle requirements.
- Fire-alarm interface: Integrated fire-alarm link for connection per the approved egress and life-safety design.
- Solid-state reliability: Intelligent short-circuit detection and isolation help protect compatible door-control circuits.
- Thermal overload sensing: Supports protection during abnormal loading and overheating conditions.
- Service-friendly connections: Removable Euro-style terminal blocks simplify field wiring and maintenance.
- AC input: Designed for compatible 110/120VAC, 60Hz installations; wiring must follow the current factory instructions.
- Board-only design: Reuse or provide an appropriate protective enclosure and mounting arrangement in accordance with applicable electrical codes.
Technical Specifications
| Manufacturer | Command Access Technologies |
|---|---|
| Manufacturer Part Number / SKU | PS2-BO |
| Product Type | Regulated replacement power-supply board assembly, without enclosure |
| Designed Replacement For | Discontinued Von Duprin PS873-2 power supply board |
| Nominal AC Input | 110/120VAC, 60Hz |
| Nominal DC Output | Regulated 24VDC |
| Output Capacity | 2A total rated output at 24VDC |
| Control Channels | Two solid-state inputs and two outputs |
| Trigger Type | Dry-contact triggering per manufacturer instructions |
| Boost Feature | Built-in inrush / latch-pullback boost circuitry |
| Fire-Alarm Link | Yes |
| Protection Features | Thermal overload sensing and intelligent short-circuit detection |
| Field Connections | Removable Euro-style connectors |
| Metal Enclosure | Not included; board-only model |
| Battery Charging / Backup | Not included; see PS2BB-BO for the battery-backup version |
| Shipping Weight | 5 lb working estimate; verify actual packed weight before shipping |
Typical Commercial Applications
- Replacement of compatible discontinued Von Duprin PS873-2 power-supply boards
- Electric latch-retraction exit devices requiring regulated 24VDC power
- Two independently triggered electrified exit-device circuits
- Commercial door repair, access-control maintenance and legacy power-supply retrofits
- Institutional, commercial and industrial electrified door hardware installations
Included and Not Included
Included: One Command Access PS2-BO replacement power-supply board assembly. Not included: Metal cabinet/enclosure, backup batteries, battery charging circuit, exit devices, locks, field wiring, external control components or installation labor.
Installation and Ordering Notes
Confirm the existing cabinet, electrical supply, terminal configuration, connected load, fire-alarm integration and wiring compatibility before ordering. This is the PS2-BO board-only 24VDC/2A unit, not PS2BB-BO, a complete enclosed PS2 power supply or a generic relay board. Installation and mains wiring must be performed by qualified personnel following the current Command Access documentation and applicable electrical and egress codes.
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