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

Showing Results for Power Supplies

Compare

Add to Cart The item has been added
Transition Networks

SKU: 25104

Transition Networks 25104 48VDC 5A DIN Rail Power Supply

48VDC 5A DIN rail supply for distributed network and PoE infrastructure
- 240W regulated output handles multiple access points or PoE injectors
- Universal AC input 85–264V works across North American and European sites
- Mounts directly to DIN rail in enclosures or cabinets without brackets
In stock · Ships same business day

$424.99 $380.99 Save $44.00

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
Transition Networks

SKU: 25105

Transition Networks 25105 120W DIN Rail Power Supply

48VDC 120W DIN rail supply for network & security infrastructure
- 48VDC @ 2.5A regulated output powers switches, cameras, access control
- Universal 88–264VAC input works across North America, Europe, Asia-Pacific
- Compact DIN rail mount fits standard enclosures without external brick
In stock · Ships same business day

$250.99 $224.99 Save $26.00

Add to Cart
The item has been added
Compare

Out of stock
Transition Networks

SKU: 25130

Transition Networks 25130 Power Supply

480W industrial power supply for Transition Networks hardened switches
- 480-watt output with wide AC input range (90–264V, 47–63 Hz)
- TAA compliant for government and federal procurement channels
- Compatible with Transition Networks hardened switching platforms
Special Order · Ships in 2-3 weeks

$79.99 $71.99 Save $8.00

Add to Cart
The item has been added
Compare

Out of stock
Transition Networks

SKU: 25131

Transition Networks 25131 48VDC 75W DIN Rail Power Supply

48VDC 75W DIN rail power supply for industrial network infrastructure
- 75W output supports Transition Networks switches and 48VDC equipment
- Compact DIN rail mount fits standard cabinet and panel installations
- Industrial-grade design for telecom, security, and infrastructure deployments
Special Order · Ships in 2-3 weeks

$128.99 $122.99 Save $6.00

Add to Cart
The item has been added
Compare

Out of stock
Transition Networks

SKU: 25148

Transition Networks 25148 90W 48V Power Adapter

90W 48V industrial adapter for Transition Networks infrastructure
- 90–264V AC input supports global power standards and unstable supplies
- Level 6 industrial construction rated for rack, outdoor, and DIN-rail mount
- Integrates with Transition Networks managed switches and media converters
Special Order · Ships in 2-3 weeks

$78.99

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
Transition Networks

SKU: 25148-NA

Transition Networks 25148-NA 90W 48V Power Adapter Level 6

90W 48V power adapter for Transition Networks Gigabit switches
- 90W output at 48V DC with Level 6 keyed connector prevents misalignment
- Compatible with 24-port and 48-port unmanaged Gigabit switches
- Regulated DC power for enterprise network and industrial deployments
In stock · Ships same business day

$78.99

Add to Cart
The item has been added
Compare

Out of stock
Transition Networks

SKU: 25165

Transition Networks 25165 Meanwell HDR-30-12 Power Supply 12VDC

12VDC industrial power supply, 24W, DIN-rail mount for network gear
- 24W output at 12VDC, 2A supports access points, switches, edge devices
- Wide 85–264V AC input tolerates standard and variable facility power
- Compact DIN-rail form factor fits confined cabinet and telecom spaces
Special Order · Ships in 2-3 weeks

$55.99 $49.99 Save $6.00

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
Transition Networks

SKU: ACC-520-0165-00

Transition Networks ACC-520-0165-00 12W Power Adapter

12W regulated 12V adapter for Transition Networks telecom gear
- 12V DC regulated output handles field and permanent installations
- Compact external form factor fits tight equipment racks and enclosures
- Compatible with Transition Networks cellular and networking equipment
In stock · Ships same business day

$41.99 $37.99 Save $4.00

Add to Cart
The item has been added
Compare

Out of stock
Transition Networks

SKU: SPS-2460-PS

Transition Networks SPS-2460-PS External Power Supply

24–60V DC input adapter for network equipment in field installations
- Accepts 24–60 VDC input, outputs 12.25 VDC for Transition Networks gear
- DIN rail or wall-mount cabinet installation in remote or enclosed spaces
- Rated for industrial operating temps; storage range -40°C to 85°C
Special Order · Ships in 2-3 weeks

$199.99 $179.99 Save $20.00

Add to Cart
The item has been added
Compare

Out of stock
Transition Networks

SKU: SPS-2460-SA

Transition Networks SPS-2460-SA External High Temp Power Supply

3W external adapter for Transition Networks gear in high-temp sites
- Operates reliably in industrial high-temperature environments
- 12.25 VDC output from 24–60 VDC input range
- DIN rail mount option for standalone network appliance deployment
Special Order · Ships in 2-3 weeks

$212.99 $190.99 Save $22.00

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
Transition Networks

SKU: SPS-UA12DHT-NA

Transition Networks SPS-UA12DHT-NA 18W Universal AC Power Adapter

18W universal adapter with 90–264V input for global networking gear
- +12VDC output powers serial servers, switches, and media converters worldwide
- Single unit works across 120V North American and 230V European power standards
- Compact external form factor fits tight equipment racks and wall-mount installations
In stock · Ships same business day

$49.99

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
Valcom

SKU: V-C6124P

Valcom V-C6124P 24V 6A Switching Power Supply

24V 6A rack-mount switching supply for Valcom audio systems
- 144W peak output at 6A supports multiple Valcom devices or high-draw single unit
- Switching topology minimizes heat in 24/7 rack-enclosure operation vs. linear design
- 19-inch rack form factor integrates into control rooms and telecommunications racks
In stock · Ships same business day

$516.00 $256.99 Save $259.01

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
Valcom

SKU: VMT-1

Valcom VMT-1 600-Ohm Impedance Matching Transformer

600-ohm passive transformer for telephone and PA system audio matching
- Dual-mode operation handles both input and output matching in one unit
- Balanced and unbalanced audio support with zero power required
- Eliminates signal reflections and insertion loss across legacy infrastructure
In stock · Ships same business day

$46.99

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
Valcom

SKU: VMT-2

Valcom VMT-2 600 Ohm Audio Isolation Transformer

Passive 600 Ohm transformer eliminates ground loop hum in distributed audio
- Galvanic isolation via magnetic coupling—no external power required
- 600 Ohm line-level impedance for mixers, amplifiers, and audio processors
- Wall-mount design weighs 0.5 lbs for retrofit into existing systems
In stock · Ships same business day

$37.99 $33.99 Save $4.00

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
Valcom

SKU: VP-12124

Valcom VP-12124 24VDC 12A Switching Power Supply

24VDC/12A switching supply for multi-device audio and comms systems
- 300W output powers up to a dozen endpoints simultaneously without voltage sag
- Accepts 120V or 240V AC input, 47–63 Hz for flexible facility installation
- Wall-mounted switching topology runs efficient and cool in equipment rooms
In stock · Ships same business day

$525.99 $470.99 Save $55.00

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
Valcom

SKU: VP-2124D

Valcom VP-2124D 24VDC 2A Power Supply

Regulated 24VDC 2A power supply for paging and audio systems
- 48W output (24VDC @ 2A continuous) with stable regulated voltage
- Wall bracket, 19" rack rail, or DIN rail mounting in tight spaces
- Universal 110–240V AC input; compact 0.60 lb form factor
In stock · Ships same business day

$237.99

Add to Cart
The item has been added

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

Transition Networks 25104 48VDC 5A DIN Rail Power Supply

Transition Networks 25105 120W DIN Rail Power Supply

Transition Networks 25130 Power Supply

Transition Networks 25131 48VDC 75W DIN Rail Power Supply

Transition Networks 25148 90W 48V Power Adapter

Transition Networks 25148-NA 90W 48V Power Adapter Level 6

Transition Networks 25165 Meanwell HDR-30-12 Power Supply 12VDC

Transition Networks ACC-520-0165-00 12W Power Adapter

Transition Networks SPS-2460-PS External Power Supply

Transition Networks SPS-2460-SA External High Temp Power Supply

Transition Networks SPS-UA12DHT-NA 18W Universal AC Power Adapter

Valcom V-C6124P 24V 6A Switching Power Supply

Valcom VMT-1 600-Ohm Impedance Matching Transformer

Valcom VMT-2 600 Ohm Audio Isolation Transformer

Valcom VP-12124 24VDC 12A Switching Power Supply

Valcom VP-2124D 24VDC 2A Power Supply

Browse by Product Family

What to Look For When Buying

Technology Stack

Typical Deployment Scenarios

Top Brands for Power Supplies

Frequently Asked Questions

Related Categories

Engineering Reading