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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Comelit

SKU: 1209/4

Comelit 1209/4 4-Output Power Supply

Four independent regulated outputs for Comelit intercom & access control
- 4 isolated output channels prevent single-device power issues from affecting others
- Regulated DC power maintains stable voltage under peak load conditions
- Wall-mount or DIN-rail installation fits standard electrical enclosures
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$119.99

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Comelit

SKU: 1209/8

Comelit 1209/8 8-Output PoE+ Power Supply

8-port PoE+ power supply for Comelit intercom systems, wall or rack mount
- Eight independent PoE+ (802.3at) outputs power up to 8 devices from one unit
- Centralized architecture simplifies commissioning and isolates faults to single ports
- Wall and rack compatible for flexible deployment in residential or commercial installs
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$184.01 $105.99 Save $78.02

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Comelit

SKU: 1210

Comelit 1210 Mixer & Power Supply for Building Kit

PoE+ mixer & power supply for Comelit building intercom systems
- PoE+ (802.3at) powers connected devices over single cable
- Integrated audio mixing for multiunit intercom communication
- Wall and rack mount options for flexible installation layouts
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$213.99 $203.99 Save $10.00

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Comelit

SKU: 1441

Comelit 1441 VIP Power Supply for 1440/1456 Series

Centralized 19-inch rack-mount power supply for Comelit 1440/1456 systems
- Supports all 1440 and 1456 series variants (B, S, G) in single unit
- 19-inch rack mount consolidates power distribution in control rooms
- Eliminates scattered adapters—manages multi-endpoint intercom deployments
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$118.99 $113.99 Save $5.00

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Comelit

SKU: 1441B

Comelit 1441B VIP Power Supply

Regulated power module for Comelit 1440/1456 intercom systems
- Supports multi-unit installations with stable regulated output
- Compatible with 1440, 1456, and all B/S/G variant models
- Indoor mounting in control rooms or central distribution points
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$229.99 $219.99 Save $10.00

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Comelit

SKU: 1596B

Comelit 1596B 33Vdc Power Supply for 316 Series

33Vdc auxiliary supply for Comelit 316 series intercoms
- Regulated 33Vdc output for 316 series entrance stations
- Wall-mounted enclosure with screw terminal connections
- Designed for residential and light commercial installations
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$183.99 $175.99 Save $8.00

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Comelit

SKU: 4888CU

Comelit 4888CU Mixer & Power Supply for Simplebus CSA

Centralized mixer & power supply for Simplebus CSA audio distribution
- Combines audio mixing and power distribution in single chassis for simplified wiring
- Purpose-built for Comelit Simplebus CSA ecosystem with native signal integrity
- Reduces installation complexity across multi-zone residential and commercial deployments
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$619.14 $296.99 Save $322.15

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Comelit

SKU: 909021930

Comelit 909021930 Readykey K2100/K2200 8-Amp Power Supply

8-amp PoE+ power supply for Readykey K2100/K2200 intercoms
- 8-amp PoE+ (802.3at) feeds network-based entry control systems
- Supports Comelit Readykey K2100 and K2200 series platforms
- Centralized power distribution simplifies cabling for mid-scale deployments
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$382.99 $366.99 Save $16.00

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Comelit

SKU: 909022008

Comelit 909022008 7-Amp Regulated Power Supply

7-amp regulated supply with selectable 12/24VDC for access control and intercoms
- Dual voltage output (12VDC or 24VDC) eliminates need for multiple power supplies
- 7-amp rating supports door strikes, maglocks, relay modules, and intercom stations
- Regulated output with thermal protection maintains stable voltage across mixed deployments
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$613.99

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Comelit

SKU: 909032059

Comelit 909032059 3-Amp 12Vdc Power Supply

12Vdc regulated 50W power supply for Comelit intercom systems
- 3-Amp output at 12Vdc for video door stations and access control
- PoE+ (802.3at) compatible for networked intercom configurations
- Wall-mount or rack-mount installation in indoor technical spaces
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$198.99 $190.99 Save $8.00

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Comelit

SKU: KVV8111

Comelit KVV8111 Visto VIP Kit with Power Supply

4MP Visto VIP kit with integrated PoE+ power supply
- 4MP resolution over PoE+ (802.3at) networked installation
- Complete kit includes KVV8111 unit and power supply
- Integrates with Comelit Visto VIP ecosystem deployments
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$536.99 $513.99 Save $23.00

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Comelit

SKU: PSU50-001

Comelit PSU50-001 12V Power Supply Unit

12V 50W regulated power supply for Comelit intercoms and access control
- 50W @ 12V DC, 3.6A output for continuous auxiliary power in security systems
- AC/DC conversion with regulated output for stable operation in control cabinets
- DIN rail mount fits standard electrical enclosures for organized installations
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$244.99 $234.99 Save $10.00

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Comelit

SKU: PSU50-002

Comelit PSU50-002 12/24V Power Supply 3.6A/1.8A

Dual-voltage rack PSU for Comelit access control, 12V/24V selectable
- 12V @ 3.6A or 24V @ 1.8A output for mixed-voltage system setups
- 19-inch rack mount form factor fits standard telecom/security cabinets
- Universal AC input with regulated DC for access panels and door locks
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$257.99 $246.99 Save $11.00

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Comnet

SKU: PS12DC-1A-US

Comnet PS12DC-1A-US 12VDC Power Supply

12VDC 1A industrial power supply for IP cameras and surveillance
- 12VDC 1A output with universal 100–240VAC input, single connector
- Operates across industrial temperature range for outdoor deployments
- Compact 1.1 × 1.1 × 1.1 in form factor under 1 kg
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$36.00 $23.99 Save $12.01

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Comnet

SKU: PS12DC3A

Comnet PS12DC3A Power Supply

12V DC 3A DIN rail power supply for network infrastructure
- 12V DC output at 3A supports distributed network equipment in compact panel spaces
- DIN rail mount integrates directly with switches and telecom infrastructure
- Industrial-grade construction for remote sites and security system deployments
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$55.99

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Comnet

SKU: PS48V-.84A

Comnet PS48V-.84A 48V Power Supply

48V DC power supply for Comnet network switches and surveillance gear
- 40.3W output at 48V / 0.84A supports switches, fiber converters, modules
- Industry-standard DC connector integrates with Comnet infrastructure deployments
- Compact 1 lb form factor fits security, telecom, and IP surveillance setups
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$146.99

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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

Comelit 1209/4 4-Output Power Supply

Comelit 1209/8 8-Output PoE+ Power Supply

Comelit 1210 Mixer & Power Supply for Building Kit

Comelit 1441 VIP Power Supply for 1440/1456 Series

Comelit 1441B VIP Power Supply

Comelit 1596B 33Vdc Power Supply for 316 Series

Comelit 4888CU Mixer & Power Supply for Simplebus CSA

Comelit 909021930 Readykey K2100/K2200 8-Amp Power Supply

Comelit 909022008 7-Amp Regulated Power Supply

Comelit 909032059 3-Amp 12Vdc Power Supply

Comelit KVV8111 Visto VIP Kit with Power Supply

Comelit PSU50-001 12V Power Supply Unit

Comelit PSU50-002 12/24V Power Supply 3.6A/1.8A

Comnet PS12DC-1A-US 12VDC Power Supply

Comnet PS12DC3A Power Supply

Comnet PS48V-.84A 48V Power Supply

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What to Look For When Buying

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