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

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Comnet

SKU: PS48V-1.25A

Comnet PS48V-1.25A Industrial Power Supply

48V industrial power supply for distributed network infrastructure
- 1.25A output rated for industrial operating temperatures
- Compact 5.7" × 2.36" × 1.26" form factor under 0.5kg
- Compatible with Comnet managed and unmanaged network equipment
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Cradlepoint

SKU: 170717-000

Cradlepoint 170717-000 12V DC Power Supply

12V DC power supply with 2x2 Molex for Cradlepoint routers
- 12V DC output with 2x2 4-pin Molex connector for direct appliance integration
- Compact form factor fits tight equipment racks and wall-mounted enclosures
- Field-replaceable design enables quick swap-out in remote site deployments
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Cradlepoint

SKU: 170863-000

Cradlepoint 170863-000 12V DC Power Supply Barrel Connector

12V DC barrel connector replacement for Cradlepoint routers
- 12V DC output with barrel connector for direct swap into compatible models
- Desktop wall-mount form factor fits remote offices and field deployments
- Spare unit on hand eliminates downtime from failed primary adapter
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Cradlepoint

SKU: 170869-000

Cradlepoint 170869-000 12V 5.5A Power Supply

12V 5.5A power supply for Cradlepoint C7 gear, −30°C to 70°C
- 12V DC output with 5.5A max current via 2x2 4-pin Molex connector
- Wide operating range −30°C to 70°C handles arctic to tropical sites
- Compact form factor fits standard DIN rails and enclosed equipment racks
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Cradlepoint

SKU: 170716-001

Cradlepoint Inc 170716-001 12VDC Power Supply 1.5M

12V DC power supply for Cradlepoint ruggedized routers with 1.5m cable
- 12V DC output with 2x2 4-pin Molex connector for R2100, IBR, E300, E100
- Operates reliably across -20°C to 60°C for field and remote deployments
- 1.5-meter cable length supports flexible installation in distributed sites
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Cradlepoint

SKU: 170751-000

Cradlepoint Inc 170751-000 54V 120W PoE Power Supply

54V 120W PoE power supply for Cradlepoint router deployments
- 120W PoE budget supports multiple powered devices across your network
- Universal 100–240V AC input with integrated 2-meter power cable
- 54V DC @ 3.3A output via 2x2 Molex connector for secure installation
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$192.99 $184.99 Save $8.00

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Cradlepoint

SKU: 170752-002

Cradlepoint Inc 170752-002 At&t Sim Card 2ff/3ff/4ff Uicc-i

AT&T SIM card for Cradlepoint routers; 2FF/3FF/4FF multi-format
- Works with 4G LTE and 5G networks on AT&T (MCC-MNC 310-280)
- UICC-I trio form factors fit legacy, micro, and nano-SIM slots
- Activation and data plan required separately through AT&T
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$9.99

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Cradlepoint

SKU: 170862-000

Cradlepoint Inc 170862-000 12V Barrel Power Supply

12V DC barrel connector power supply for Cradlepoint routers
- 12V DC output with barrel connector for desktop and wall-mount setups
- Compatible with Cradlepoint 5G, 4G LTE, and Wi-Fi router models
- 1.8M cable length for flexible deployment in office and field environments
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Cradlepoint

SKU: 170924-000

Cradlepoint Inc 170924-000 12VDC Power Supply 2x2 Molex

12V DC power supply with dual Molex connectors for Cradlepoint routers
- 3.0A output through 2x2 4-pin Molex dual connectors for redundant power
- 100-240V AC universal input supports global installations, 50-60 Hz
- 1.5-meter cable with standard Molex connectors for flexible rack mounting
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Cradlepoint

SKU: TAA-170716-001

Cradlepoint Inc TAA-170716-001 12VDC Power Supply 1.5M

12VDC power supply for Cradlepoint R2100, IBR, E300, E100 routers
- 12VDC regulated output with 1.5-meter integrated cable for flexible deployment
- TAA-certified for federal procurement and government contract eligibility
- Supports ruggedized router platforms in mobile, edge, and branch locations
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Digi International

SKU: 301-9000-04

Digi International 301-9000-04 5V/3A Wall Mount Power Adapter

5V/3A wall mount adapter for Digi networking equipment worldwide
- 100-240VAC input supports global deployment without regional variants
- Compact wall-mount form factor integrates directly into standard outlets
- UL, cUL, GS, CE, PSE, CCC certified for international installations
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$127.99

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Digi International

SKU: 301-9000-23

Digi International 301-9000-23 5V/3A Wall Mount Power Supply

5V/3A wall-mount supply for Digi networking equipment globally
- 5V at 3A output with 100-240VAC input for worldwide use
- Wall-mount form factor saves rack space in distributed deployments
- Drop-in replacement for Digi platform products requiring 5V DC power
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$66.99 $60.99 Save $6.00

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Digi International

SKU: 450065

Digi International 450065 PSU 19V 2.63A Power Supply

19V/2.63A replacement PSU for Digi EX50, U115, U120
- Direct replacement or supplemental power for Digi edge devices
- 19V 2.63A output supports continuous operation in field deployments
- Compatible across EX50, U115, and U120 device families
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Digi International

SKU: 76000195

Digi International 76000195 48-Inch RJ-45/DB-25M Cable

48-inch RJ-45 to DB-25M serial adapter cable for legacy equipment
- Connects modern RJ-45 infrastructure to DB-25 male serial ports
- 48-inch length spans console connections and modem interfaces
- Integrates legacy serial devices with Digi device and terminal servers
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$32.99

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Digi International

SKU: 76000199

Digi International 76000199 48-Inch RJ-45/DB-25F Cable

RJ-45 to DB-25F straight cable, 48 inches for legacy serial gear
- Connects Digi serial devices to DB-25F equipment without adapters
- 48-inch length routes freely in cabinets and wall-mount setups
- Straight assembly supports terminal servers and serial-to-Ethernet gear
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$32.99

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Digi International

SKU: 76000201

Digi International 76000201 48-Inch RJ-45/DB-9F Serial Cable

48-inch RJ-45 to DB-9F serial cable for terminal servers
- Connects RJ-45 ports to DB-9F serial devices in rack setups
- Straight-through configuration supports standard RS-232 communication
- 48-inch length fits standard equipment rack spacing and wall mounts
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$32.99

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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

Comnet PS48V-1.25A Industrial Power Supply

Cradlepoint 170717-000 12V DC Power Supply

Cradlepoint 170863-000 12V DC Power Supply Barrel Connector

Cradlepoint 170869-000 12V 5.5A Power Supply

Cradlepoint Inc 170716-001 12VDC Power Supply 1.5M

Cradlepoint Inc 170751-000 54V 120W PoE Power Supply

Cradlepoint Inc 170752-002 At&t Sim Card 2ff/3ff/4ff Uicc-i

Cradlepoint Inc 170862-000 12V Barrel Power Supply

Cradlepoint Inc 170924-000 12VDC Power Supply 2x2 Molex

Cradlepoint Inc TAA-170716-001 12VDC Power Supply 1.5M

Digi International 301-9000-04 5V/3A Wall Mount Power Adapter

Digi International 301-9000-23 5V/3A Wall Mount Power Supply

Digi International 450065 PSU 19V 2.63A Power Supply

Digi International 76000195 48-Inch RJ-45/DB-25M Cable

Digi International 76000199 48-Inch RJ-45/DB-25F Cable

Digi International 76000201 48-Inch RJ-45/DB-9F Serial Cable

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What to Look For When Buying

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