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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Speco Technologies

SKU: A1PS

Speco Technologies A1PS Single Door Controller and Power Supply

Single door controller with integrated 12VDC power supply in compact form
- Combined controller and power supply eliminates separate components and wiring
- Regulated 12VDC output prevents lock failures from voltage drops
- Compact 3.2 x 3.0 x 1.3 in design fits tight mechanical rooms and closets
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$1,444.00 $500.99 Save $943.01

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Speco Technologies

SKU: D16HTDPS

Speco Technologies D16HTDPS 12V6.67A Power Supply for the 16 chan

12V 80W regulated power supply for Speco 16-channel DVR systems
- 12V DC @ 6.67A output with regulated constant voltage for stable operation
- Direct compatibility with Speco HT and HU series 16-channel desktop DVRs
- Compact desktop form factor for indoor surveillance control room installations
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$41.99

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Speco Technologies

SKU: D816VSWMPS

Speco Technologies D816VSWMPS 12VDC 5A Power Supply for the 8 & 1

12VDC 5A regulated power supply for 8 & 16-channel DVR systems
- 12VDC 5A output supports multi-channel recorder installations reliably
- Compatible with RS, VS, DS, HS, VT, NS, and ZS series DVRs
- AC/DC conversion for indoor equipment room and server closet deployment
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$32.99

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Speco Technologies

SKU: P4W5D

Speco Technologies P4W5D 4CH @ 5A DC Camera Power Supply (W-12VDC

4-channel 12VDC power supply for analog and IP camera systems
- 5A per channel (20A total) supports multiple cameras from one hub
- DIN rail or wall mount for flexible integration in security installations
- Works with analog CCTV and non-PoE IP cameras without adapters
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$151.30 $59.99 Save $91.31

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Speco Technologies

SKU: PSDC24

Speco Technologies PSDC24 12VDC @ 2A Power Supply UL Listed

Compact 12VDC @ 2A regulated power supply, UL listed for security systems
- 12VDC @ 2A output powers cameras, DVRs, and access control devices
- UL listed with cabinet-mount form factor for indoor security installations
- Standard DC barrel connector integrates with existing surveillance equipment
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$42.80 $18.99 Save $23.81

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Speco Technologies

SKU: PSR4C

Speco Technologies PSR4C 4 Amp Regulated 12VDC Power Supply with

12VDC 4-amp regulated power supply for security cameras and access control
- 4 amps continuous output with regulated DC for voltage stability
- Includes cigarette lighter adapter for flexible indoor deployment
- Compatible with cameras, DVRs, alarm panels, and access control devices
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$56.99

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Speco Technologies

SKU: PSW4

Speco Technologies PSW4 24VAC 50VA Power Supply

24VAC 50VA power supply for surveillance cameras and access control
- 50VA output supports multiple standard-power cameras in one installation
- 24VAC regulated output compatible with Speco and third-party devices
- Compact indoor unit (4.0 x 3.0 x 3.0 in) for centralized power distribution
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$88.80 $31.99 Save $56.81

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Speco Technologies

SKU: PSW5

Speco Technologies PSW5 1 Amp 12VDC Regulated Power Supply

12VDC regulated supply for access control and encoders without voltage sag
- 1 Amp 12VDC output keeps devices stable across long cable runs
- 100–240 VAC input works globally; compact indoor form factor
- Positioned near endpoints eliminates single-point-of-failure power topology
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$39.50 $22.99 Save $16.51

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Speco Technologies

SKU: SP4AWET

Speco Technologies SP4AWET 4-Inch Outdoor 70V Speaker

4-inch outdoor 70V speaker for extended cable runs and multi-zone PA
- 70V transformer supports 50+ feet per channel without signal loss or upsized wire
- Weather-sealed powder-coated enclosure rated for outdoor use in all conditions
- Wall and surface mount design integrates into security and campus audio systems
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$154.50 $64.99 Save $89.51

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Speco Technologies

SKU: T7010

Speco Technologies T7010 10W 70V Line Transformer

10W 70V line transformer for commercial audio over 100+ feet
- Converts 4–8 ohm amplifier output to 70V line, eliminating signal loss on long runs
- 10W capacity supports multiple 70V speakers across medium-to-large facilities
- Passive design requires no external power; mounts on wall, ceiling, or in rack
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$29.50 $10.99 Save $18.51

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Speco Technologies

SKU: T7020

Speco Technologies T7020 20W 70V Line Transformer

20W 70V line transformer for commercial audio distribution
- 20W continuous power handling for medium to large installation zones
- Passive design requires no external power supply or additional wiring
- Multiple taps support flexible wattage allocation across speaker zones
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$19.99

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Speco Technologies

SKU: T70255

Speco Technologies T70255 5W 70/25V Dual Transformer

5W dual transformer for mixed 70V/25V speaker systems
- Supports both 70V and 25V configurations in single unit
- Passive design requires no external power supply
- Compact form factor fits wall, ceiling, or rack mounting
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$13.99

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Speco Technologies

SKU: WB86T

Speco Technologies WB86T Wall Baffle 70V Transformer Dial

Wall-mount 70V speaker baffle with integrated transformer dial
- Passive mechanical dial adjusts level independently per speaker
- Supports 500+ feet cable runs on single 70V circuit
- Surface or recessed mount; no external power or controls needed
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$158.00 $62.99 Save $95.01

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Transition Networks

SKU: 25025-NA

Transition Networks 25025-NA 24-Port Gigabit Unmanaged Switch

24-port Gigabit unmanaged switch, plug-and-play, 15W fanless
- 24 × 1 Gbps ports handle simultaneous full-duplex traffic across all ports
- No configuration needed—unmanaged architecture eliminates setup complexity
- 15W power draw with passive cooling fits tight power budgets
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$74.99

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Transition Networks

SKU: 25032

Transition Networks 25032 8-Port 10G Industrial Switch

8-port 10G unmanaged switch for industrial DIN rail deployment
- 8 × 10G Ethernet ports with multi-mode fiber support for standard runs
- Operates -40°C to +70°C industrial temperature range, no configuration needed
- 12VDC 0.8A input, DIN rail mount for control cabinet and edge installations
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$28.99 $25.99 Save $3.00

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Transition Networks

SKU: 25079

Transition Networks 25079 24VDC Power Supply

24VDC DIN-rail power supply for industrial network cabinets
- 24VDC output supports Transition Networks switching platforms
- DIN-rail mount integrates into compact telecom installations
- Designed for unmanaged 8-port Gigabit switch deployments
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$158.99 $152.99 Save $6.00

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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

Showing Results for Power Supplies

Speco Technologies A1PS Single Door Controller and Power Supply

Speco Technologies D16HTDPS 12V6.67A Power Supply for the 16 chan

Speco Technologies D816VSWMPS 12VDC 5A Power Supply for the 8 & 1

Speco Technologies P4W5D 4CH @ 5A DC Camera Power Supply (W-12VDC

Speco Technologies PSDC24 12VDC @ 2A Power Supply UL Listed

Speco Technologies PSR4C 4 Amp Regulated 12VDC Power Supply with

Speco Technologies PSW4 24VAC 50VA Power Supply

Speco Technologies PSW5 1 Amp 12VDC Regulated Power Supply

Speco Technologies SP4AWET 4-Inch Outdoor 70V Speaker

Speco Technologies T7010 10W 70V Line Transformer

Speco Technologies T7020 20W 70V Line Transformer

Speco Technologies T70255 5W 70/25V Dual Transformer

Speco Technologies WB86T Wall Baffle 70V Transformer Dial

Transition Networks 25025-NA 24-Port Gigabit Unmanaged Switch

Transition Networks 25032 8-Port 10G Industrial Switch

Transition Networks 25079 24VDC Power Supply

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What to Look For When Buying

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