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Power Supplies

Power supplies provide stable and regulated power for surveillance cameras, access control devices, and intercom systems. Selecting the proper voltage, amperage, and redundancy configuration ensures reliable operation and minimizes system downtime in commercial environments.

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: EFLOW6N

Altronix EFLOW6N 12/24VDC 6A Power Supply Charger

12/24VDC 6A power supply with battery backup and fire alarm control
- Jumper-selectable 12 or 24VDC output at 6A for access control and locks
- Integrated battery backup with automatic AC fail switchover for continuity
- Fire alarm interface supervision with controlled power disconnect on alarm
$522.68 $306.99 Save $215.69

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Altronix

SKU: EFLOW6N16

Altronix EFLOW6N16 16-Output Fused Power Supply

16-output fused supply for distributed access control and security
- 16 independently fused outputs with 6A total capacity across 12/24VDC
- Selectable voltage output matches 12VDC or 24VDC device requirements
- FAI and LinQ2-ready architecture integrates with legacy and modern systems
$594.53 $348.99 Save $245.54

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Altronix

SKU: EFLOW6N16D

Altronix EFLOW6N16D 16-Output 12/24VDC Power Supply

16-output 12/24VDC power supply, 6A combined, FAI/LinQ2 ready
- 16 individually PTC-protected outputs prevent nuisance shutdowns on access control loads
- Selectable 12/24VDC output handles mixed-voltage systems from single unit
- Compact BC300 form factor fits standard racks and wall-mount installations
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Altronix

SKU: EFLOW6N16V

Altronix EFLOW6N16V 16-Output Power Supply 6A

16-output 6A power supply with selectable 12/24VDC and battery backup
- 16 independently fused outputs isolate faults and prevent cascading failures
- Integrated battery backup with AC mains, battery condition, and rail monitoring
- Selectable 12/24VDC output supports legacy and modern security equipment
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Altronix

SKU: EFLOW6N8

Altronix EFLOW6N8 8-Output Power Supply Charger

8-output 12/24VDC power supply with battery backup for security systems
- Eight independently fused outputs isolate faults and prevent cascade failures
- Selectable 12/24VDC output voltage supports mixed-device installations
- 6A total capacity with integrated charger for emergency battery backup
$560.27 $328.99 Save $231.28

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Altronix

SKU: EFLOW6N8D

Altronix EFLOW6N8D 12/24VDC 6A Power Supply Charger

Dual-voltage 6A power supply with 8 protected outputs and battery backup
- Selectable 12/24VDC output at 6A supports mixed-voltage security systems
- 8 individually PTC-protected circuits prevent single-device faults from cascading
- Integrated charger with AC fail and low battery supervision for uninterrupted operation
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Altronix

SKU: EFLOW6NB

Altronix EFLOW6NB 6A 24VDC Power Supply with Battery Backup and Fire Alarm Disconnect

6A 24VDC supply with integrated battery backup and fire alarm control
- Configurable 12V or 24V output supports mixed legacy and modern equipment
- 6A capacity powers 4–6 access doors, small NVR, or distributed sensors
- Built-in battery charger with AC fail and low-battery supervision outputs
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$390.97 $232.99 Save $157.98

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Altronix

SKU: EFLOW6NBV

Altronix EFLOW6NBV 6A Dual-Voltage Power Supply Charger

Dual-voltage 6A charger for 12V/24V security systems, 220VAC input
- Selectable 12VDC or 24VDC output at 6A continuous for mixed-voltage loads
- Integrated battery charging function for backup power in control panels
- Compact panel-mount design fits tight spaces in access and security installations
$397.25 $232.99 Save $164.26

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Altronix

SKU: EFLOW6NX

Altronix EFLOW6NX Two (2) Output Power Supply/Charger

8-output 12/24VDC power supply with battery backup for security systems
- 6A total capacity across 8 independent outputs for multi-device distribution
- Automatic battery switchover with AC Fail and Low Battery supervision
- UL Listed 120VAC input with Fire Alarm Disconnect function
$539.82 $311.99 Save $227.83

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Altronix

SKU: EFLOW6NX16

Altronix EFLOW6NX16 Power Supply/Charger w/Fire Alarm Discon

8-channel 12/24VDC power supply with fire alarm disconnect and battery backup
- Fire alarm disconnect function meets emergency shutdown code requirements
- 8 independent channels at selectable 12/24VDC for mixed-voltage systems
- Battery backup with AC fail, low battery, and battery presence supervision
$620.77 $357.99 Save $262.78

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Altronix

SKU: EFLOW6NX16D

Altronix EFLOW6NX16D Power Supply/Charger w/Fire Alarm Discon

8-output 12/24VDC supply with fire alarm disconnect for life safety
- 8 independent outputs at 4A each with 6A total current capacity
- Integrated fire alarm disconnect relay for emergency power sequencing
- Battery backup with AC fail, low battery, and battery presence supervision
$620.77 $357.99 Save $262.78

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Altronix

SKU: EFLOW6NX8

Altronix EFLOW6NX8 Power Supply/Charger w/Fire Alarm Discon

Eight-output 12/24VDC supply with battery backup and fire alarm disconnect
- 8 isolated channels with 6A total current and per-channel limiting
- Integrated battery charger maintains power during AC loss
- Fire alarm disconnect relay automatically shuts down non-critical outputs
$611.17 $351.99 Save $259.18

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Altronix

SKU: EFLOW6NX8D

Altronix EFLOW6NX8D Power Supply/Charger w/Fire Alarm Discon

8-output 12/24VDC supply with battery backup and fire alarm disconnect
- 8 independently regulated outputs at 6A total capacity for multi-device systems
- Integrated fire alarm disconnect relay for emergency circuit isolation
- Battery backup with automatic charging plus AC Fail and Low Battery supervision
$611.17 $351.99 Save $259.18

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Altronix

SKU: FIRESWITCH108

Altronix FIRESWITCH108 24VDC 10A NAC Power Supply

24VDC 10A power supply with segregated Class A/B circuits for access control
- 4 Class A + 8 Class B circuits isolate critical devices from load-shedding
- 10A continuous output across all circuits from single 115VAC input
- Ethernet remote monitoring and optional battery backup modules
$1,175.94 $674.99 Save $500.95

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Altronix

SKU: LPS3

Altronix LPS3 Linear Power Supply 12/24VDC 0.5A

Selectable 12/24VDC linear supply for security systems, 0.5A output
- Choose 12VDC or 24VDC output via board configuration—one unit fits mixed-voltage deployments
- Linear regulation minimizes RF noise for stable analog sensor and legacy alarm operation
- Accepts standard 16/24VAC transformer input; mounts in 12"H × 8"W × 6"D form factor
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$86.33 $85.99 Save $0.34

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Altronix

SKU: LPS3AC

Altronix LPS3AC Linear Power Supply/Charger 12/24VDC

Compact 12/24VDC linear supply with integrated battery charging for access control
- Selectable 12VDC or 24VDC output with 0.5–0.75A current capacity
- Built-in battery charger with AC fail and low battery supervision signals
- Board-form factor designed for OEM integration in small security installations
$116.27 $115.99 Save $0.28

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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

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