Power Supplies for Surveillance & Access Control Systems

Plan Your Deployment

Voltage and amperage requirements for connected devices
Centralized vs distributed power architecture
Redundancy and failover considerations
Indoor vs outdoor installation requirements
Code compliance and surge protection planning

Showing Results for Power Supplies

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HES

SKU: AQD1-8C1

HES AQD1-8C1 1 Amp Dual Voltage Power Supply

8-channel 12/24V power supply with 1A per circuit for access control
- Eight independent 1 Amp outputs with individual PTC protection per channel
- Dual voltage (12/24 VDC) supports mixed-device installations in one unit
- Enclosure-mounted design for secure network closet or rack installation
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$206.99

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HES

SKU: AQD2

HES AQD2 Power Supply 2A 12/24VDC with Charger

Dual-voltage 2A power supply with integrated battery charger for access control
- Selectable 12VDC or 24VDC output at 2 amps for electric strikes and magnetic locks
- Built-in battery charger function eliminates need for separate backup charging unit
- Compact indoor-rated design fits standard access control system installations
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$203.99

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HES

SKU: AQD2-1R

HES AQD2-1R Dual Voltage Power Supply 2A with Charger

Dual-voltage 2A supply with integrated charger and fire relay for access control
- Selectable 12/24VDC output eliminates need for multiple SKUs in mixed systems
- Built-in battery charger maintains backup power without separate module
- Fire relay output integrates with building fire alarm systems
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$234.99

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HES

SKU: AQD2-4C

HES AQD2-4C 2A Power Supply 12/24VDC with Charger

Dual-voltage 2A power supply with 4 PTC-protected outputs for access control
- Selectable 12/24VDC output with 2-amp capacity across 4 channels
- Integrated battery charger for backup power in access control systems
- PTC protection per output eliminates need for external fuses
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$266.99

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HES

SKU: AQD2-4F1

HES AQD2-4F1 Power Supply 2A 12/24VDC with Charger

Regulated 2A supply with selectable 12/24VDC and integrated battery charger
- Four independently fused outputs for isolated circuit protection across devices
- Selectable 12VDC or 24VDC output matches access control and lock requirements
- Integrated battery charger maintains backup power for continuity during outages
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$250.99

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HES

SKU: AQD2-8C1

HES AQD2-8C1 2 Amp Dual Voltage Power Supply

8-channel dual voltage supply for access control and security systems
- 8 independent channels with 1 Amp PTC protection per channel
- Dual voltage operation supports both 12 VDC and 24 VDC equipment
- Wall or rack mount enclosed design with 2 Amp total output capacity
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$242.99

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HES

SKU: AQD2-8F8R1

HES AQD2-8F8R1 Power Supply 2A 12/24VDC Charger

Dual-voltage 2A power supply with 8 fused relays for access control
- Selectable 12VDC or 24VDC output at 2A for auxiliary power distribution
- 8 fused relay outputs including dedicated fire relay for life safety signaling
- Integrated battery charging in compact form factor for control panel mounting
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$294.99

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HES

SKU: AQD2B

HES AQD2B Power Supply Board 2A 12/24VDC

Compact 2A power board with field-selectable 12/24VDC output and integrated charging
- Field-selectable 12VDC or 24VDC output at 2A continuous (24W or 48W)
- Integrated onboard battery charger for backup power and UPS configurations
- Board-form factor sized for OEM integration and equipment enclosure mounting
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$131.99

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HES

SKU: AQD4

HES AQD4 4A 12/24VDC Power Supply with Integrated Battery Charger

Dual-voltage 4A supply with built-in battery charger for access control
- Selectable 12VDC or 24VDC output eliminates need for multiple supplies
- Integrated battery charging circuit backs up locks during power loss
- DIN rail mount fits standard control panels and electrical enclosures
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$443.99

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HES

SKU: AQD4-1R

HES AQD4-1R 4A Dual Voltage Power Supply with Charger

Dual-voltage 4A supply with integrated charger for access control
- Selectable 12VDC or 24VDC output supports mixed security installations
- Built-in battery charger maintains backup power during outages
- Fire relay output integrates with emergency signaling systems
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$260.99

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HES

SKU: AQD4-4C1R1

HES AQD4-4C1R1 Supervised Power Supply 12/24VDC

Dual-voltage supervised supply with active fault detection for access control
- 4A main output + 1A dedicated monitoring circuit with real-time status
- Selectable 12VDC or 24VDC output for flexible controller and reader support
- Integrated PTC protection auto-manages overcurrent without nuisance shutdowns
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$294.99

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HES

SKU: AQD4-4F1

HES AQD4-4F1 Supervised Power Supply 12/24VDC 4A

Supervised 12/24VDC 4A power supply with four isolated fused channels
- Four independent 1A fused channels with fault isolation per circuit
- Selectable 12VDC or 24VDC output for legacy and modern security devices
- Regulated output for access control, surveillance, and alarm system loads
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$262.99

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HES

SKU: AQD4-4F2

HES AQD4-4F2 Supervised Power Supply 12/24VDC

Supervised 12/24VDC power supply with 4-amp output for access control
- Selectable 12/24VDC regulated output with 4-amp capacity and 2-amp fused protection
- Integrated supervision circuit monitors power status and detects line faults in real time
- Overload and short-circuit protection for electromagnetic locks, card readers, door controllers
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$262.99

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HES

SKU: AQD6

HES AQD6 Power Supply 6A 12/24VDC with Charger

6A regulated power supply with dual 12/24VDC output and integrated charger
- 6-amp output supports access control systems, locks, and exit devices
- Selectable 12VDC or 24VDC voltage eliminates need for separate supplies
- Built-in battery charger maintains backup power in compact enclosure-mount design
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$255.99 $239.99 Save $16.00

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HES

SKU: AQD6B

HES AQD6B Power Supply Board 6A 12/24VDC Charger

Board-level 6A power supply with selectable 12/24VDC and battery charger
- 6A output at user-selectable 12VDC or 24VDC for access control and security devices
- Integrated battery charger maintains backup power for uninterrupted system operation
- Compact board form factor mounts directly in cabinets and control enclosures
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$180.99

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HES

SKU: AQL104

HES AQL104 10A 24V DC Power Supply Module

10A 24VDC module for access control power distribution
- 10-ampere output at 24VDC for door locks and strikes
- Module-only format integrates into custom enclosures
- Regulated DC power for auxiliary security devices
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$262.99

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What to Look For When Buying

The decisions that matter most before you spec.

Amperage & Load Planning

Size your supply at 120–130% of peak load to avoid thermal shutdown and extend component life. A 24V system with five 5A devices (25A nominal) needs a 32A or 40A supply. Under-sizing is a leading cause of system failure during peak demand.

Redundancy for Life-Safety & Access Control

Single supplies fail without warning. Dual-supply designs or UPS-backed configurations ensure doors unlock and intercoms function during power anomalies. Redundancy is required by code in many jurisdictions for egress and emergency communication.

Voltage Selection & Device Compatibility

Most locks, readers, and access points run 12V or 24V; cameras vary widely. Verify every device's rated voltage before specifying. Mixing 12V and 24V systems in one cabinet requires isolated supplies or regulators to prevent cross-voltage damage.

PoE Power Budget Constraints

Standard PoE (802.3af) supplies 15.4W per port; PoE+ (802.3at) 30W; High Power (802.3bt) up to 95W. A 24-port switch can deliver only ~375W total, easily exhausted by dense camera and access-point deployments. Injectors and midspans extend capacity.

Environmental & Mounting Constraints

Outdoor cabinets and damp enclosures require sealed, conformal-coated supplies rated for temperature extremes (−20 to +70°C typical). DIN-rail mounting saves space; enclosed supplies offer better noise isolation and thermal dissipation in server rooms.

Vendor Selection & Lead Times

Brands like Honeywell, Speco Technologies, and HES dominate access-control power; Pelco and Digi International focus on surveillance and networking. Verify manufacturer support, warranty, and stock availability before design lock-in.

Technology Stack

The specs and acronyms that actually affect power supplies performance.

DC Voltage Regulation & Ripple

Quality supplies hold output within ±5% of rated voltage under load variations and input sags. Ripple (AC noise superimposed on DC output) should be <2% peak-to-peak; excessive ripple causes camera image noise and lock chatter. Look for ±5V, ±12V, ±24V stability specs in datasheets.

Current Rating & Amperage Classes

Expressed in Amps (A) at rated voltage—e.g., 24V/5A, 24V/10A, 24V/40A. Higher amperage doesn't mean faster devices; it determines how many devices can draw simultaneously. Always check individual device current draw in milliamps (mA) and sum peak totals, not averages.

Power Factor & Input Voltage Range

Industrial supplies accept 100–240V AC input (worldwide compatible) and deliver regulated DC output. Power factor >0.9 reduces heating and helps avoid utility surcharges. Check input range to ensure compatibility with generators and unclean site power.

Short-Circuit & Fuse Protection

Integral fusing (fast or slow blow) and electronic current limiting protect the supply and downstream wiring from overcurrent events. Some supplies auto-recover; others latch off and require manual reset. Verify protection mode and response time for your application.

UPS Integration & Holdup Time

Supplies with integral or stackable battery backup maintain output for 5–60 minutes during AC loss, bridging the time for graceful shutdown or backup power activation. Holdup time (hold-up capacitor reserves) is separate; typical range 10–50 ms.

PoE (Power over Ethernet) Standards

802.3af (Type 1) = 15.4W, 802.3at (Type 2/PoE+) = 30W, 802.3bt (Type 3/4, High Power) = 60–95W. Injectors and midspan splitters add PoE to non-PoE switches. Always verify endpoint compliance and total switch/injector budget vs. connected device demand.

Typical Deployment Scenarios

Small Office Access Control (Single Door)

One 12V/5A regulated supply feeds an electric strike lock, RFID reader, and request-to-exit button. Total load ~2A. A simple wall-mount supply with integral fuse handles this; add a surface-mount enclosure in humid areas. Budget: 1 supply, 1 backup fuse kit.

Mid-Size Surveillance Closet (16 IP Cameras + NVR)

A 24V/20A regulated DIN-rail supply powers four 5A PoE injectors (one per four cameras), plus the NVR's 24V auxiliary input. If cameras are all PoE-enabled and the switch is remote, injectors bridge the gap. Add a second supply for redundancy and a UPS battery module for 10-minute hold-up.

Multi-Building Campus with Distributed Access (8 Doors, 24 Cameras)

Each building requires a local 24V/10A supply (for locks, readers, intercoms) plus one or two PoE injectors per camera cluster. Cabinet-mounted DIN-rail supplies with integral breakers minimize field wiring. Specify weatherproof outdoor enclosures for exterior cabinets; trunk all power back to a central UPS for life-safety compliance.

High-Density Server & Intercom Integration

A redundant 24V/40A supply pair feeds six 24V devices (intercoms, door controllers, call stations) and distributes 12V to analog sensors via a buck regulator. Modular or multi-output supplies reduce cable clutter. Proper conduit routing and junction boxing maintain code compliance and thermal management.

Frequently Asked Questions

What size power supply do I need for my system?

Add up the current draw (in milliamps or amps) of every device connected to that supply—cameras, locks, readers, intercoms. Multiply by 1.25 (safety factor) and round up to the next standard supply size (e.g., 5A, 10A, 20A, 40A). Always verify supply and load voltage match exactly.

Can I use one power supply for mixed 12V and 24V devices?

No. Single outputs are isolated; mixing voltages risks damage. Use separate regulated supplies for each voltage, or a multi-output supply with isolated rails. If you must share a cabinet, use a buck converter (24V down to 12V) downstream of a 24V primary supply, but size the primary for total current demand.

What's the difference between a regular power supply and a UPS-backed supply?

A regular regulated supply converts AC to clean DC and stops when AC fails. A UPS-backed supply includes integral or stackable battery modules that maintain DC output for minutes after AC loss, allowing orderly shutdown or switchover to backup power. Essential for access control and emergency intercoms.

Do I need a PoE injector if my switch already has PoE?

Not necessarily, but injectors solve two common problems: (1) extending PoE to non-PoE switches, and (2) supplementing insufficient switch PoE budget. A 24-port PoE+ switch can only deliver ~375W total; dense deployments often need additional injectors per camera cluster. Plan your PoE budget carefully upfront.

What does ±5% voltage regulation mean?

The supply guarantees output stays within ±5% of rated voltage (e.g., 24V ±1.2V = 22.8–25.2V) across load and input variations. Tighter specs (±3%) cost more but reduce noise and improve camera image stability. Cameras typically tolerate ±10%; locks are pickier (±5% or better).

How do I mount a power supply in an outdoor cabinet?

Use a DIN-rail mounted supply inside an IP65-rated enclosure. Ensure the enclosure has ventilation or a thermostat fan to keep internal temperature below the supply's rating (typically 70°C max). Add a surge protector or SPD at the AC input, and run conduit from the cabinet to devices using conduit adapters and gang plates for strain relief.

Power Supplies

Plan Your Deployment

Showing Results for Power Supplies

HES AQD1-8C1 1 Amp Dual Voltage Power Supply

HES AQD2 Power Supply 2A 12/24VDC with Charger

HES AQD2-1R Dual Voltage Power Supply 2A with Charger

HES AQD2-4C 2A Power Supply 12/24VDC with Charger

HES AQD2-4F1 Power Supply 2A 12/24VDC with Charger

HES AQD2-8C1 2 Amp Dual Voltage Power Supply

HES AQD2-8F8R1 Power Supply 2A 12/24VDC Charger

HES AQD2B Power Supply Board 2A 12/24VDC

HES AQD4 4A 12/24VDC Power Supply with Integrated Battery Charger

HES AQD4-1R 4A Dual Voltage Power Supply with Charger

HES AQD4-4C1R1 Supervised Power Supply 12/24VDC

HES AQD4-4F1 Supervised Power Supply 12/24VDC 4A

HES AQD4-4F2 Supervised Power Supply 12/24VDC

HES AQD6 Power Supply 6A 12/24VDC with Charger

HES AQD6B Power Supply Board 6A 12/24VDC Charger

HES AQL104 10A 24V DC Power Supply Module

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What to Look For When Buying

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Typical Deployment Scenarios

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Frequently Asked Questions

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