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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: DPS5

Altronix DPS5 Linear Power Supply/Charger 4A

Compact linear supply with selectable 6/12/24VDC output and 4A capacity
- Choose 6VDC, 12VDC, or 24VDC output to match security and access control gear
- 4A maximum current at 6VDC with linear regulation for clean, stable power
- Accepts 16–28 VAC input; single output simplifies wiring in cabinet installations
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Altronix

SKU: EFLOW102N

Altronix EFLOW102N Two-Output 12VDC Power Supply/Charger

Dual-channel 12VDC supply with isolated outputs for security equipment
- Two independent 12VDC outputs prevent cross-load faults between devices
- 6A total capacity splits across channels for mixed door strikes and cameras
- 115VAC input, UL Listed, BC300 enclosure fits standard rack installations
$522.68 $300.99 Save $221.69

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Altronix

SKU: EFLOW102N16

Altronix EFLOW102N16 Power Supply/Charger w/Fire Alarm Discon

12VDC power supply with 8 outputs, battery backup, fire alarm disconnect
- 8 independent 12VDC channels at 10A total capacity for multi-device systems
- Integrated battery backup with AC fail, low battery, and presence supervision
- Fire alarm disconnect function isolates power during alarm; UL Listed, DIN rail mount
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$594.53 $341.99 Save $252.54

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Altronix

SKU: EFLOW102N16D

Altronix EFLOW102N16D Power Supply/Charger w/Fire Alarm Discon

12VDC power supply with 16 outputs and integrated fire alarm disconnect
- 16 individually supervised PTC Class 2 outputs at 10A maximum capacity
- Battery backup with AC fail, low battery, and battery presence supervision
- Integrated fire alarm disconnect for emergency shutdown compliance
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Altronix

SKU: EFLOW102N8

Altronix EFLOW102N8 Power Supply/Charger w/Fire Alarm Discon

12VDC power supply with 8 circuits, battery backup, and fire alarm disconnect
- 8 independent 12VDC output circuits distribute power across access control and alarm loads
- Automatic battery switchover on AC loss with supervision for power status and battery health
- Integrated fire alarm disconnect relay de-energizes protected circuits during alarm activation
$560.27 $321.99 Save $238.28

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Altronix

SKU: EFLOW102N8D

Altronix EFLOW102N8D 12VDC Power Supply with Fire Alarm Disconnect

12VDC 10A power supply with 8 protected outputs and fire alarm disconnect
- Eight Class 2 PTC outputs with individual overcurrent protection isolate faults
- Integrated fire alarm disconnect relay auto-shuts security system on alarm signal
- 12VDC regulated output with automatic battery float charging and AC fail supervision
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Altronix

SKU: EFLOW102NA8

Altronix EFLOW102NA8 12VDC 10A Power Supply With 8-Output

12VDC 10A access control supply with 8 fused relay outputs
- 12VDC @ 10A primary output plus integrated battery charger for backup
- Eight independently fused relay circuits for door locks and solenoids
- 115VAC input in compact BC400 enclosure, UL Listed and CE Certified
$699.65 $409.99 Save $289.66

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Altronix

SKU: EFLOW102NB

Altronix EFLOW102NB 12VDC 10A Board Power Supply with Battery Backup

12VDC 10A board supply with integrated battery backup and fire alarm control
- 10A output powers multiple access control, alarm, and intercom devices simultaneously
- Integrated charger manages float and charge cycles; AC fail and low battery supervision
- Fire alarm disconnect with automatic load shedding complies with NFPA 72 fire codes
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$397.25 $232.99 Save $164.26

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Altronix

SKU: EFLOW102NBV

Altronix EFLOW102NBV 12VDC 10A Power Supply Board

12VDC @ 10A board-level supply for security cabinet integration
- 220V AC input with regulated 12VDC output for cameras and access control
- Compact board form factor designed for OEM mounting in control enclosures
- Single output supports mid-scale installations with 10A continuous capacity
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Altronix

SKU: EFLOW102NX

Altronix EFLOW102NX 12VDC 10A Power Supply Charger

12VDC 10A power supply with integrated battery backup and fire alarm disconnect
- 16 distribution terminals deliver 12VDC @ 10A continuous to multiple security devices
- Integrated battery backup with AC fail, low battery, and battery presence supervision
- FAI-compliant fire alarm disconnect automatically removes power on alarm signal
$539.82 $311.99 Save $227.83

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Altronix

SKU: EFLOW102NX16

Altronix EFLOW102NX16 16-Output 12VDC Power Supply

16-output 12VDC supply with battery backup for security systems
- 16 individually fused outputs isolate loads and prevent cascading failures
- Integrated charger with AC fail supervision maintains power during outages
- UL listed for security/fire alarm use with low battery detection
$622.98 $364.99 Save $257.99

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Altronix

SKU: EFLOW102NX16D

Altronix EFLOW102NX16D 12VDC 10A 16-Output Power Supply

16-output 12VDC power supply for distributed security loads
- 16 individually PTC-protected Class 2 outputs prevent short circuits
- 12VDC @ 10A with 115VAC input and auxiliary output for backup
- FAI supervision and LinQ2 ready for integrated system monitoring
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Altronix

SKU: EFLOW102NX8

Altronix EFLOW102NX8 12VDC 10A Power Supply Charger

12VDC 10A power supply with 8 fused outputs and battery backup
- 8 individually circuit-protected outputs isolate devices and prevent nuisance shutdowns
- Integrated charging circuit supports sealed lead-acid battery for UPS operation
- AC fail, low battery, and battery presence supervision with fire alarm disconnect
$577.42 $338.99 Save $238.43

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Altronix

SKU: EFLOW102NX8D

Altronix EFLOW102NX8D 12VDC 8-Output Power Supply

12VDC power supply with 8 protected outputs and battery backup
- Eight PTC-protected outputs isolate faults and prevent system-wide outages
- 12VDC regulated output with integrated battery backup and low battery monitoring
- UL Listed Class 2 with fire alarm disconnect supervision for life safety systems
$577.42 $332.99 Save $244.43

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Altronix

SKU: EFLOW104N

Altronix EFLOW104N Two (2) Output Power Supply/Charger

24VDC 10A power supply with integrated battery backup and fire alarm disconnect
- 10A total output from 120VAC input with UL Listed approval for code compliance
- Integrated battery backup maintains power during outages with supervision monitoring
- Fire alarm disconnect function for safety-critical access control installations
$580.78 $333.99 Save $246.79

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Altronix

SKU: EFLOW104N16

Altronix EFLOW104N16 Power Supply/Charger w/Fire Alarm Discon

24VDC power supply with 8 outputs, battery backup, and fire alarm disconnect
- Eight independent 24VDC outputs at 10A total for distributed power to security systems
- Integrated battery charger with supervised charging plus AC fail and low battery alerts
- Fire alarm disconnect relay provides emergency circuit isolation for code compliance
$652.84 $374.99 Save $277.85

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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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