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

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DMP

SKU: 368/10

DMP 368/10 5.0 Ah 12 VDC Lead-Acid Battery

12 VDC 5.0 Ah lead-acid backup for access control systems
- 5.0 Ah capacity sustains door control and reader operation during power loss
- 12 VDC output compatible with HID access control and security infrastructure
- Direct connection to power distribution for credential system protection
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$335.99

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DMP

SKU: 369/4

DMP 369/4 7.0 Ah 12 VDC Lead-Acid Battery

12V sealed lead-acid battery for access control backup power
- 7.0 Ah capacity runs 1A loads for ~7 hours on full charge
- Sealed design needs no maintenance—no electrolyte monitoring required
- 12 VDC output integrates directly into DMP security architectures
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$177.99

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DMP

SKU: 370RJ

DMP 370RJ Lightning Suppressor

Lightning suppressor for access control and security power systems
- Protects against transient surge and lightning-induced damage to equipment
- Integrates into power distribution systems for security infrastructure
- Compatible with power supply systems in access control and telecommunications
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$112.00 $58.99 Save $53.01

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DMP

SKU: 372-500-W

DMP 372-500-W 12V 500mA Power Supply

12V 500mA regulated power supply for DMP security & access control
- 12V DC output at 500mA supports security panels and networked devices
- TCP/IP network compatible for system monitoring and remote integration
- Compact wall-mount or cabinet form factor for flexible installation
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$14.99

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DMP

SKU: 376

DMP 376 12 Volt Wall Plug-In Power Supply

12V DC wall-plug power for DMP access control and alarm panels
- 12V DC regulated output from standard 120V AC wall outlet
- Compact wall-mount design for access control, door strikes, alarm panels
- Indoor installation in equipment rooms or panel enclosures
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$36.40 $27.99 Save $8.41

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ELK Products

SKU: ELK-P624

ELK Products ELK-P624 6VDC Battery Charger and Power Supply

6VDC battery charger and power supply for ELK security panels
- Regulated 6VDC output with 1.0A rating for stable auxiliary power
- Integrated float charging maintains backup battery condition automatically
- Compact 3" × 3" enclosure-mount form factor with AC/DC surge suppression
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$42.99

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ELK Products

SKU: ELK-TRG1640

ELK Products ELK-TRG1640 16-Output 45VA Transformer

16-output 45VA transformer with regulated 5Vac for distributed access control
- 16 isolated channels distribute power to multiple readers and auxiliary devices
- 45VA capacity rated for continuous 24/7 operation in secured installations
- Compact form factor centralizes power regulation across multi-door deployments
In stock · Ships same business day

$25.99

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ELK Products

SKU: ELK-TRG2440

ELK Products ELK-TRG2440 24Vac 40VA Power Transformer

24Vac 40VA transformer for ELK security panel power distribution
- 24Vac output at 40VA capacity for control panels and door strike loads
- Regulated power supply designed for ELK security system installations
- Supports residential and commercial access control equipment integration
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$26.99

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ELK Products

SKU: ELK-W119

ELK Products ELK-W119 Dual Battery Wires for M1 Controls

Dual battery wire assembly for ELK M1 control panel backup power
- Supports dual battery configurations for continuous operation during power loss
- Designed specifically for ELK M1 control panels during initial setup or replacement
- Backup battery wire assembly for standard M1-based security system installations
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$18.99

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Geovision

SKU: GV-BATBOX

Geovision GV-BATBOX Battery Box

UPS battery enclosure for Geovision DVR, NVR, and IP camera systems
- User-configurable battery capacity—install your own cells for custom runtime
- Indoor mounting in control rooms, server closets, and equipment racks
- Enclosure only; ships without batteries for flexible system integration
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$73.99

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Geovision

SKU: GV-POWER

Geovision GV-POWER Power Box AC24AC 72VA

24V AC 72VA power box for centralized multi-camera Geovision deployments
- 72VA capacity distributes 24V AC power to multiple IP and analog cameras
- Rack or wall-mount installation in control rooms and equipment cabinets
- Regulates AC24V output for reliable centralized power architecture
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$124.99 $121.99 Save $3.00

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Hanwha

SKU: AT-IE048-240

Hanwha AT-IE048-240 240W Industrial Power Supply

240W @ 48Vdc AC/DC supply for industrial network infrastructure
- 240W continuous output at 48Vdc for enterprise switches and edge equipment
- DIN rail mount fits standard cabinets and control enclosures with compact profile
- AC/DC conversion accepts universal input from commercial and industrial power sources
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$850.00 $550.99 Save $299.01

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Hanwha

SKU: AT-PWR1200

Hanwha AT-PWR1200 Secondary Hot Swap Power Supply

Redundant hot swap power supply for Hanwha security systems
- Secondary module operates in tandem with primary supply for fault tolerance
- Replace unit under load with zero downtime—no system shutdown required
- Enterprise-grade design for 24/7 mission-critical surveillance operations
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$3,800.00 $2,461.99 Save $1,338.01

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HES

SKU: AQD1

HES AQD1 1A Auxiliary Power Supply 12/24VDC

1A auxiliary supply for access control—12/24VDC selectable with battery charger
- 1-amp continuous output powers door strikes, locks, and card readers from one unit
- Field-selectable 12VDC or 24VDC output matches existing site power infrastructure
- Integrated battery charger maintains backup power for fail-safe operation during outages
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$327.00 $169.99 Save $157.01

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HES

SKU: AQD1-1R

HES AQD1-1R 12/24VDC 1A Power Supply

Selectable 12/24VDC 1A power supply for mixed-voltage access control
- Dual-voltage output eliminates need for multiple supply units in retrofit deployments
- 1A maximum current rated for low-amperage auxiliary circuits and credential readers
- Compact wall-mounted or cabinet form factor with standard terminal connections
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$190.99

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HES

SKU: AQD1-4C1

HES AQD1-4C1 Dual Voltage Power Supply with Charger

Dual voltage 12/24VDC supply with integrated charger and 4 PTC outputs
- Selectable 12VDC or 24VDC output from single unit eliminates multiple SKUs
- Four PTC-protected outputs provide individual circuit protection without external fuses
- Built-in battery charger supports backup power for access control systems
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$199.99

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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

DMP 368/10 5.0 Ah 12 VDC Lead-Acid Battery

DMP 369/4 7.0 Ah 12 VDC Lead-Acid Battery

DMP 370RJ Lightning Suppressor

DMP 372-500-W 12V 500mA Power Supply

DMP 376 12 Volt Wall Plug-In Power Supply

ELK Products ELK-P624 6VDC Battery Charger and Power Supply

ELK Products ELK-TRG1640 16-Output 45VA Transformer

ELK Products ELK-TRG2440 24Vac 40VA Power Transformer

ELK Products ELK-W119 Dual Battery Wires for M1 Controls

Geovision GV-BATBOX Battery Box

Geovision GV-POWER Power Box AC24AC 72VA

Hanwha AT-IE048-240 240W Industrial Power Supply

Hanwha AT-PWR1200 Secondary Hot Swap Power Supply

HES AQD1 1A Auxiliary Power Supply 12/24VDC

HES AQD1-1R 12/24VDC 1A Power Supply

HES AQD1-4C1 Dual Voltage Power Supply with Charger

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