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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Altronix

SKU: ALTV2432300UCB3

Altronix ALTV2432300UCB3 24VAC 12.5A Power Supply Cord

24VAC 12.5A replacement cord for Altronix power supplies
- 24VAC output rated for 12.5A maximum current draw
- 32PTC thermal protection circuit safeguards against overcurrent
- Direct replacement for Altronix 24VAC power supply installations
$515.38 $332.99 Save $182.39

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Altronix

SKU: ALTV2432300UL

Altronix ALTV2432300UL 32-Output 24VAC Power Supply

32-output 24VAC wall supply for distributed access control and CCTV
- 32 individually fused outputs isolate circuits for independent protection
- 12.5A total capacity across selectable 24/28VAC output voltage
- 115VAC input, wall-mount form factor, UL Listed and CE marked
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Altronix

SKU: ALTV2432300UL3

Altronix ALTV2432300UL3 32-Output 24VAC Power Supply

32-output 24VAC supply for distributed security and access control
- 32 independent 24VAC channels eliminate need for multiple supplies
- UL Listed and CE approved for North American and European deployments
- Single consolidated unit reduces installation complexity in large systems
$567.10 $332.99 Save $234.11

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Altronix

SKU: ALTV2432300ULCB

Altronix ALTV2432300ULCB 32-Output CCTV Power Supply

32-output 24/28VAC Class 2 power supply for mid-scale CCTV systems
- 32 individually PTC-protected outputs prevent nuisance shutdowns and enable independent supervision
- 12.5A aggregate capacity with selectable 24/28VAC output for legacy and current cameras
- 115VAC input in wall-mountable BC300 metal enclosure, ready for control room or cabinet install
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Altronix

SKU: ALTV2432350

Altronix ALTV2432350 32-Output 24VAC Power Supply

32-output 24VAC wall-mount power supply for distributed camera systems
- 32 independently fused outputs for isolated circuit protection per device
- 24VAC regulated output maintains consistent voltage across all ports
$532.91 $343.99 Save $188.92

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Altronix

SKU: ALTV2432350CB

Altronix ALTV2432350CB 32-Output CCTV Power Supply

32-output 24/28VAC power supply for centralized CCTV distribution
- 32 independently controlled outputs with selectable 24VAC @ 14A or 28VAC @ 12A
- Rack-mount compatible design for large-scale surveillance installations
- Centralized AC/DC distribution eliminates individual camera power supplies
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Altronix

SKU: ALTV2432600

Altronix ALTV2432600 32-Output 24/28VAC Power Supply

32-output 24/28VAC power supply for large CCTV and access control
- 32 independent outputs with dual voltage: 24VAC @ 28A or 28VAC @ 25A
- Continuous duty operation for multi-camera surveillance deployments
- Centralized power distribution for enterprise security infrastructure
$753.83 $439.99 Save $313.84

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Altronix

SKU: ALTV2432600CB

Altronix ALTV2432600CB 32 Output CCTV Power Supply -24VAC @ 28

32-output -24VAC power supply for large CCTV installations
- 32 individually regulated channels isolate each camera on separate circuits
- 28-amp total capacity distributes power across extended surveillance networks
- -24VAC output matches standard CCTV camera voltage requirements
$753.83 $439.99 Save $313.84

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Altronix

SKU: ALTV2432600UCB3

Altronix ALTV2432600UCB3 24VAC 25A Power Supply

24VAC 25A power supply with 32 PTC-protected outputs for security systems
- 32 individually protected circuits prevent overcurrent without fuse replacement
- 25A capacity handles multi-door access control and camera arrays simultaneously
- 3-line power cord input for flexible rack or enclosure installation
$757.29 $443.99 Save $313.30

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Altronix

SKU: ALTV2432600UL

Altronix ALTV2432600UL 32-Output 24/28VAC Power Supply

32-output 24/28VAC wall-mount supply for distributed security power
- 32 individually fused circuits at 25A each for independent load protection
- Selectable 24/28VAC output from 115VAC input for flexible system integration
- UL Listed and CE approved for access control, CCTV, and alarm installations
$688.22 $443.99 Save $244.23

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Altronix

SKU: ALTV2432600ULCB

Altronix ALTV2432600ULCB 32 Output CCTV Power Supply -24VAC @ 25

32-output 24VAC power supply for large CCTV installations, 25A capacity
- 32 independent channels distribute regulated 24/28VAC across multi-camera arrays
- 25A total capacity handles simultaneous power to cameras and accessories
- Class 2 certified, 115VAC input, compact BC300 enclosure for rack deployment
$688.22 $443.99 Save $244.23

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Altronix

SKU: ALTV244

Altronix ALTV244 4-Output 24VAC CCTV Power Supply

Four-output 24VAC wall-mount supply with individual fuse isolation per channel
- Four independent 24VAC outputs, each with individual fusing for fault isolation
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$203.01 $117.99 Save $85.02

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Altronix

SKU: ALTV244175

Altronix ALTV244175 4-Output 24/28VAC Power Supply

Four independent 24/28VAC outputs for multi-camera security systems
- 4 isolated channels distribute 24/28VAC power across CCTV and access control devices
- Wall-mounted 115V AC input unit fits compact installation spaces in surveillance deployments
- Regulated output voltage maintains stable operation for cameras, door strikes, and PTZ motors
$420.59 $271.99 Save $148.60

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Altronix

SKU: ALTV244175220

Altronix ALTV244175220 24VAC 7.25A 4-Output Power Supply

24VAC 7.25A four-channel power supply for multi-camera CCTV systems
- Four independent 24VAC outputs distribute power to multiple cameras simultaneously
- 7.25A total capacity handles typical surveillance installations with headroom
- US-manufactured unit rated for security and access control applications
$431.25 $277.99 Save $153.26

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Altronix

SKU: ALTV244175CB

Altronix ALTV244175CB 4-Output 24VAC Power Supply

4-output 24VAC wall-mount power supply for CCTV and security systems
- Four independent 24VAC outputs distribute power to multiple security devices
- Wall-mount design fits compact installations without floor or rack space
- 28VAC input accepts standard AC voltage for reliable security infrastructure
$420.59 $271.99 Save $148.60

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Altronix

SKU: ALTV244175CB220

Altronix ALTV244175CB220 24VAC 7.25A 4-Output Power Supply

Four isolated 24VAC outputs, 7.25A total, 220V input for international CCTV
- Four independent regulated channels with individual isolation prevent cascading failures
- 7.25A aggregate capacity powers multiple cameras and access control devices simultaneously
- 220V AC input matches European and international facility power standards
$429.35 $277.99 Save $151.36

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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

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What to Look For When Buying

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