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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: EFLOW104N16D

Altronix EFLOW104N16D 24VDC Power Supply with Fire Alarm Disconnect

24VDC 10A supply with 16 protected outputs and fire alarm disconnect
- 16 individually PTC-protected outputs reset automatically on fault clearance
- Integrated fire alarm disconnect shuts down non-life-safety loads on command
- Supports external 12V/24V battery backup with AC fail and low battery supervision
$652.84 $374.99 Save $277.85

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Altronix

SKU: EFLOW104N8

Altronix EFLOW104N8 Power Supply/Charger w/Fire Alarm Discon

24VDC 8-output power supply with fire alarm disconnect for life safety
- 10A total capacity across 8 isolated 24VDC circuits for independent loads
- Integrated fire alarm disconnect relay with automatic circuit isolation
- Battery backup with AC fail, low battery, and presence supervision
$617.08 $354.99 Save $262.09

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Altronix

SKU: EFLOW104N8D

Altronix EFLOW104N8D Power Supply/Charger w/Fire Alarm Discon

24VDC 10A power supply with 8 isolated outputs and fire alarm disconnect
- Eight independent 24VDC channels distribute power across mid-scale access control systems
- Integrated fire alarm disconnect relay meets code compliance for secured circuits
- Battery backup with AC fail and low battery supervision for continuous operation
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Altronix

SKU: EFLOW104N8V

Altronix EFLOW104N8V 24VDC 10A 8-Output Power Supply

Eight 24VDC outputs with battery backup and AC fail detection
- 10A total capacity across eight independently fused outputs for multi-zone
- Integrated battery charging with AC Fail, Low Battery, and presence monitoring
- 120VAC 60Hz input, UL listed, fire alarm disconnect supervision included
$617.08 $361.99 Save $255.09

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Altronix

SKU: EFLOW104NB

Altronix EFLOW104NB 24VDC 10A Board Power Supply with Battery Backup

24VDC 10A board supply with integrated battery backup and FAI disconnect
- 10A continuous output powers 20–30 mag locks or mixed access control loads
- Built-in battery charger and supervision (AC fail, low battery, presence detect)
- Fire alarm disconnect compliant; UL listed; compact board form for cabinet mounting
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$458.57 $268.99 Save $189.58

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Altronix

SKU: EFLOW104NBV

Altronix EFLOW104NBV 24VDC 10A Power Supply with Battery Backup

24VDC 10A power supply with sealed lead-acid battery backup and failover
- 10A continuous output from 220VAC input handles 4–8 camera systems without sag
- Sealed lead-acid charger with auto-failover maintains uptime during AC mains loss
- Auxiliary low-current output isolates independent circuits for signage and relay loads
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Altronix

SKU: EFLOW104NK1

Altronix EFLOW104NK1 Power Supply/Charger w/Fire Alarm Discon

10A dual-output power supply with fire alarm disconnect and battery backup
- Two independent 120VAC outputs plus supervised battery backup for continuous operation
- Automatic fire alarm disconnect triggers system shutdown during fire events
- UL Listed for access control, surveillance, and alarm system integration
$697.69 $408.99 Save $288.70

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Altronix

SKU: EFLOW104NK8

Altronix EFLOW104NK8 Dual Output Power Supply/Charger

24VDC dual-output supply with 10A capacity and battery backup
- Independent fused channels with 10A total current for access control
- Battery backup with supervision and fire alarm disconnect for code compliance
- UL Listed 120VAC input for security and camera system integration
$754.52 $441.99 Save $312.53

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Altronix

SKU: EFLOW104NK8D

Altronix EFLOW104NK8D Dual-Output 24/12VDC Power Supply

Dual-output 24/12VDC supply with battery backup and fire alarm disconnect
- 24VDC @ 10A primary output plus 12VDC @ 6A auxiliary for mixed-voltage systems
- Integrated charger supports two 12VDC 7Ah batteries for sustained backup power
- Hard-wired fire alarm disconnect meets life-safety code compliance requirements
$754.52 $441.99 Save $312.53

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Altronix

SKU: EFLOW104NK8DQP

Altronix EFLOW104NK8DQP Dual-Output 24/12VDC 6A Power Supply

Dual 24/12VDC output from one supply, 6A total, 8 PTC circuits
- Simultaneous 24VDC and 12VDC outputs eliminate need for separate supplies
- 8 PTC-protected circuits isolate faults without tripping entire power feed
- LINQ integration for remote monitoring and diagnostics via cloud connection
$1,185.62 $694.99 Save $490.63

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Altronix

SKU: EFLOW104NK8QP

Altronix EFLOW104NK8QP 10A 24VDC Power Supply Fire Alarm Disconnect

10A 24VDC power supply with 8-channel fused distribution and fire alarm disconnect
- 8 independent fused dual-output channels isolate loads so faults don't cascade
- Supports up to 2 × 12VDC/12AH batteries for backup power during mains loss
- Integrated 10A supply, distribution, and regulation in single 15.5"H wall enclosure
$1,185.62 $694.99 Save $490.63

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Altronix

SKU: EFLOW104NX

Altronix EFLOW104NX 24VDC 10A Power Supply Charger

24VDC 10A power supply with integrated battery backup for security systems
- 10A @ 24VDC output with integrated charger for battery backup during AC loss
- UL listed with fire alarm disconnect support for access control and alarm integration
- BC400 metal enclosure, wall or DIN-rail mount, LinQ2 compatible battery supervision
$597.92 $350.99 Save $246.93

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Altronix

SKU: EFLOW104NX16

Altronix EFLOW104NX16 24VDC 10A 16-Output Power Supply

24VDC 10A power supply with 16 fused outputs and battery backup
- 16 independently fused circuits isolate each load for fault protection
- Integrated battery charger with presence supervision for backup power
- 120VAC input with hardwired fire alarm disconnect for safe shutdown
$678.94 $397.99 Save $280.95

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Altronix

SKU: EFLOW104NX16D

Altronix EFLOW104NX16D 24VDC 10A 16-Output Power Supply

24VDC 10A power supply with 16 protected outputs and battery backup
- 16 PTC-protected Class 2 outputs isolate faults to individual circuits
- Integrated battery charging with supervision and fire alarm disconnect relay
- LinQ2-ready architecture supports remote monitoring and network supervision
$678.94 $397.99 Save $280.95

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Altronix

SKU: EFLOW104NX8

Altronix EFLOW104NX8 24VDC 10A Power Supply 8 Outputs

24VDC 10A power supply with 8 fused outputs and battery backup
- 8 individually fused outputs distribute 10A across access control and alarm systems
- Built-in battery charging and supervision maintains uptime during AC mains failure
- Fire Alarm Interface compliance and LinQ2 remote monitoring for critical infrastructure
$635.51 $372.99 Save $262.52

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Altronix

SKU: EFLOW104NX8D

Altronix EFLOW104NX8D 24VDC 10A 8-Output Power Supply

24VDC 10A 8-output power supply with battery backup and fire alarm disconnect
- Eight independently monitored outputs with PTC protection isolate faults
- Integrated battery charger with supervision for emergency backup power
- Fire alarm disconnect compliance automatically cuts auxiliary power on activation
$635.51 $372.99 Save $262.52

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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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