Power & UPS

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    Lifesafety Power FPO75-C4D8E2X 75W (12 or 24V) 4 lock outputs 8
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    Lifesafety Power FPO75-C4D8E2X

    Lifesafety Power FPO75-C4D8E2X 75W (12 or 24V) 4 lock outputs 8

    75W compact power supply from Lifesafety Power, configurable for either 12V or 24V operation

    • Selectable 12V or 24V output eliminates stocking separate supplies per site.
    • Four independent lock outputs eliminate daisy-chaining across separate door circuits.
    • Eight auxiliary outputs power sensors, keypads, and indicators from one 75W unit.
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  • Save $210.01
    Lifesafety Power FPO75-C4D8PE1M 75W PS 6A/12V or 3A/24V 4 relay
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    Lifesafety Power FPO75-C4D8PE1M

    Lifesafety Power FPO75-C4D8PE1M 75W PS 6A/12V or 3A/24V 4 relay

    75W centralized power supply and relay controller designed for distributed access control and door locking infrastructure

    • Selectable 12V/6A or 24V/3A output matches lock voltage without extra SKUs.
    • Four 3A-fused relay outputs with per-relay FAI, failsafe, or failsecure logic.
    • Eight Class 2 aux DC outputs power readers and sensors on Bus1 or Bus2.
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  • Save $373.01
    Lifesafety Power FPO75-C4D8PE2M/T4-A Power supply board 75W 6A/1
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    Lifesafety Power FPO75-C4D8PE2M/T4-A

    Lifesafety Power FPO75-C4D8PE2M/T4-A Power supply board 75W 6A/1

    75W power distribution board designed for access control and security panel integration

    • Delivers 75W at 6A/12V or 3A/24V to power locks, readers, and aux devices.
    • Pre-wired Mercury harness (1502/MR52) connects to 4-door panels without extra termination.
    • Four dedicated lock outputs plus 8 aux channels consolidate multi-door power distribution.
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  • Save $413.01
    Lifesafety Power FPO75-C4D8PE4M/T4-B Mercury ProWire Unified Pow
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    Lifesafety Power FPO75-C4D8PE4M/T4-B

    Lifesafety Power FPO75-C4D8PE4M/T4-B Mercury ProWire Unified Pow

    Unified access control power platform combining regulated power distribution, battery backup, relay lock control, and auxiliary load management in a

    • 75W, 12V/24V DC regulated output across 12 concurrent access points from one enclosure.
    • 4 relay lock outputs with failsafe/failsecure per zone; supports strikes and buzzers together.
    • Built-in fire alarm disconnect automatically releases doors for ADA-compliant emergency egress.
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  • Save $156.01
    Lifesafety Power FPO75-C4E1 4 Door Access Control 4 Lock Outputs
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    Lifesafety Power FPO75-C4E1

    Lifesafety Power FPO75-C4E1 4 Door Access Control 4 Lock Outputs

    75W distributed power supply purpose-built for multi-door access control installations where independent lock circuits are non-negotiable

    • Four individually fused 3A outputs isolate door circuits, preventing one fault from affecting others.
    • 75W budget supports four EM locks or solenoid strikes at 12V or 24V without auxiliary boost.
    • DIN-rail E1 enclosure mounts directly in access control cabinets, eliminating extra surface hardware.
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  • Save $178.01
    Lifesafety Power FPO75-C4E1-2DM2 DMP Unified Power Sys
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    Lifesafety Power FPO75-C4E1-2DM2

    Lifesafety Power FPO75-C4E1-2DM2 DMP Unified Power Sys

    DMP-integrated power supply and battery management system designed for distributed access control, fire alarm, and intercom deployments across

    • 75W output supports 4–6 EM locks with 4 independently fused 3A relay outputs.
    • Integrated battery charger and low-battery cutoff eliminate external modules and prevent deep discharge.
    • Automatic fire alarm disconnect triggers door unlock for code-compliant emergency egress.
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  • Save $185.01
    Lifesafety Power FPO75-C4E2 Power Supply Board 75W
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    Lifesafety Power FPO75-C4E2

    Lifesafety Power FPO75-C4E2 Power Supply Board 75W

    75W unified power supply board designed for access control systems requiring reliable, multi-zone power distribution

    • 75W output with 4 relay lock outputs, each fused at 3A for independent zone protection.
    • Fire alarm disconnect auto-unlocks doors on alarm signal, supporting life-safety compliance.
    • Optional Netlink module enables network monitoring, remote battery testing, and cloud dashboard.
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  • Save $207.01
    Lifesafety Power FPO75-C4E2M Power Supply Board 75W
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    Lifesafety Power FPO75-C4E2M

    Lifesafety Power FPO75-C4E2M Power Supply Board 75W

    75W power supply board designed for access control and lock management in small-to-medium commercial installations

    • Delivers 6A at 12V or 3A at 24V to power locks, readers, and relays from one board.
    • Four relay outputs, each fused at 3A, isolate faults so one shorted lock won't cascade.
    • Supports electric strikes, maglocks, and relay-driven door operators in commercial installs.
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  • Save $160.01
    Lifesafety Power FPO75-C4PD8PE1 75W Svps 4 Lock Control Out; 8AUX
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    Lifesafety Power FPO75-C4PD8PE1

    Lifesafety Power FPO75-C4PD8PE1 75W Svps 4 Lock Control Out; 8AUX

    75W supervised power supply (SVPS) designed to power and manage distributed access control devices—door locks, strikes, magnetic locks, and auxiliary

    • 75W total capacity supports 4 supervised lock control outputs from a single cabinet.
    • 8 auxiliary outputs allow monitoring of relays, sensors, and secondary devices.
    • Built-in supervision detects wiring faults, power loss, and tamper before doors fail.
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  • Save $216.01
    Lifesafety Power FPO75-C4PD8PE1M Power supply board 75W 6A/12V
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    Lifesafety Power FPO75-C4PD8PE1M

    Lifesafety Power FPO75-C4PD8PE1M Power supply board 75W 6A/12V

    75W board-mount power supply configured for 6A at 12V or 3A at 24V — designed to feed access control systems, door locks, and auxiliary loads in

    • Delivers 75W at 6A/12V or 3A/24V to support multi-door access control loads.
    • Provides 4 relay lock outputs plus 8 auxiliary DC outputs, each class 2 limited at 2.5A.
    • Mercury/Lenel backplate compatibility simplifies retrofit and new-build panel integration.
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    $632.00 $415.99 Save $216.01
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  • Save $239.01
    Lifesafety Power FPO75-C4PD8PE2M Power Supply Board 75w 6A/12V 4
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    Lifesafety Power FPO75-C4PD8PE2M

    Lifesafety Power FPO75-C4PD8PE2M Power Supply Board 75w 6A/12V 4

    Four-output 12VDC power supply designed to distribute backup power across multiple access control readers, door locks, and small-scale security

    • Four independent 12VDC outputs isolate high-current locks from sensitive reader circuits.
    • 75W capacity at 6A/12VDC supports multiple access control endpoints from a single board.
    • 120VAC input suits standard commercial utility supply for straightforward panel integration.
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  • Save $593.01
    Lifesafety Power FPO75-C4PD8PE4M/T4-A ProWire Pow Sys 75W Single
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    Lifesafety Power FPO75-C4PD8PE4M/T4-A

    Lifesafety Power FPO75-C4PD8PE4M/T4-A ProWire Pow Sys 75W Single

    UL-listed power distribution platform designed for access control and life-safety applications where prewired integration, fault tolerance, and

    • 75W at 120V AC powers up to 4 lock outputs plus 8 auxiliary zones in one enclosure.
    • Integrated fire alarm disconnect auto-unlocks doors without external relays or wiring.
    • Built-in battery charger with low-cutoff protects backup batteries during extended outages.
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    $1,730.00 $1,136.99 Save $593.01
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  • Save $221.01
    Lifesafety Power FPO75-C8D8E2 Single Voltage Offline Switchmode
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    Lifesafety Power FPO75-C8D8E2

    Lifesafety Power FPO75-C8D8E2 Single Voltage Offline Switchmode

    75W single voltage offline switchmode supply engineered for distributed access control loads across 8 independent door circuits

    • 8 independently fused 3A lock outputs prevent a single short from cascading to adjacent doors.
    • 75W envelope supports 12V @ 6A or 24V @ 3A — covers 3–6 strikes plus readers in one unit.
    • 8 additional 3A auxiliary circuits power readers and REX sensors with isolated protection.
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  • Save $588.01
    Lifesafety Power FPO75-C8D8E6M1 75W PS 6A/12V or 3A/24V 8 relay
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    Lifesafety Power FPO75-C8D8E6M1

    Lifesafety Power FPO75-C8D8E6M1 75W PS 6A/12V or 3A/24V 8 relay

    Regulated 75W AC-to-DC power supply engineered for access control and life-safety door lock systems

    • Dual-voltage output (6A/12V or 3A/24V) matches lock hardware without added converters.
    • Eight independently fused 3A relay outputs handle failsafe/failsecure per door, no relay panel needed.
    • Eight auxiliary DC outputs assignable to Bus1 or Bus2 isolate REX and sensor power from lock rails.
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  • Save $175.01
    Lifesafety Power FPO75-C8E1 FPO75-C8E1
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    Lifesafety Power FPO75-C8E1

    Lifesafety Power FPO75-C8E1 FPO75-C8E1

    75-watt industrial power enclosure designed to distribute regulated 12V or 24V DC power across eight independently fused outputs

    • Eight independently fused 3A outputs isolate faults, preventing one failed device from killing the bus.
    • Supports 12V or 24V DC distribution up to 75W total across locks, readers, and PoE injectors.
    • E1 cabinet mounts in wall or rack environments, suiting IDF closets and comms room deployments.
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  • Save $214.01
    Lifesafety Power FPO75-C8E1M PSB75W 6A/12V or 3A/24V 8 relay loc
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    Lifesafety Power FPO75-C8E1M

    Lifesafety Power FPO75-C8E1M PSB75W 6A/12V or 3A/24V 8 relay loc

    75W regulated power supply board designed for access-control and door-lock deployments requiring independent circuit isolation and multi-load

    • Eight independently fused 3A relay outputs prevent a single fault from disrupting other circuits.
    • Supports 12V (6A) or 24V (3A) operation, eliminating external converters on mixed-voltage sites.
    • Pre-installed Mercury/Lenel backplate allows direct cabinet mounting with no custom fabrication.
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  • Save $283.01
    Lifesafety Power FPO75-C8E4M Power supply board 75W 6A/12Vor 3A
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    Lifesafety Power FPO75-C8E4M

    Lifesafety Power FPO75-C8E4M Power supply board 75W 6A/12Vor 3A

    75W board-mounted power distribution module designed to serve small-to-medium security deployments that require centralized DC power rather than

    • Selectable 12VDC or 24VDC output adapts to endpoint voltage requirements per install.
    • 75W budget delivers 6A at 12V or 3A at 24V for cameras, readers, and door strikes.
    • Board-mount form factor integrates directly into power cabinets without external housing.
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  • Save $221.01
    Lifesafety Power FPO75-C8PD8PE2 FPO75 Sing Vol Pow Sys Flex Power
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    Lifesafety Power FPO75-C8PD8PE2

    Lifesafety Power FPO75-C8PD8PE2 FPO75 Sing Vol Pow Sys Flex Power

    Unified access control power supply designed for compact, single-voltage deployments requiring fire alarm integration and multi-zone relay switching

    • 75W single-voltage output supports up to 8 relay lock zones at 2.5A Class 2 each.
    • FAI input auto-unlocks doors on fire alarm signal with integrated override prevention.
    • Wall-mount enclosure (20×16×4.5 in) consolidates power, backup, and surge protection.
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  • Save $209.01
    Lifesafety Power FPO75-D8E2V HID Unified Power System
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    Lifesafety Power FPO75-D8E2V

    Lifesafety Power FPO75-D8E2V HID Unified Power System

    75W unified power supply with integrated battery charger designed for access control, emergency egress, and life-safety door systems

    • Eight individually fused 3A auxiliary outputs enable fault isolation per zone.
    • Integrated fast-charge battery management eliminates a separate charger in the enclosure.
    • Form C fire alarm relay unlocks doors on alarm signal—no add-on relay module needed.
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  • Save $250.01
    Lifesafety Power FPO75-D8E4A Power supply board 75W 6A/12V or 3A
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    Lifesafety Power FPO75-D8E4A

    Lifesafety Power FPO75-D8E4A Power supply board 75W 6A/12V or 3A

    75W power supply board designed to centralize power distribution for small-to-medium IP camera installations and access control systems

    • Dual-voltage output (12VDC/6A or 24VDC/3A) supports mixed-voltage deployments from one board.
    • 75W board consolidates power distribution for small-to-medium camera and access control systems.
    • Voltage is jumper-selected pre-commissioning; confirm endpoint ratings before energizing the board.
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    $730.00 $479.99 Save $250.01
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  • Save $264.01
    Lifesafety Power FPO75-D8E4V FPO75-D8E4V
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    Lifesafety Power FPO75-D8E4V

    Lifesafety Power FPO75-D8E4V FPO75-D8E4V

    75W auxiliary power distribution enclosure designed to feed secondary circuits in surveillance and access control systems

    • Distributes 12V DC across 8 independent fused outputs, protecting each circuit individually.
    • 75W / 6A capacity offloads door strikes and sensors from your main camera or NVR PSU.
    • E4V enclosure (24×20×4.5 in) mounts on 19-in rack rails or wall in any equipment room.
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  • Save $186.01
    Lifesafety Power FPO75-D8PE1M Power supply board 75W 6A/12Vor 3A
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    Lifesafety Power FPO75-D8PE1M

    Lifesafety Power FPO75-D8PE1M Power supply board 75W 6A/12Vor 3A

    Compact 75W power supply designed to distribute power to networked security endpoints and control devices across small-to-medium access control and

    • Selectable 12VDC/6A or 24VDC/3A primary output supports mixed-voltage deployments.
    • Eight 2.5A auxiliary outputs power locks, readers, and RTE sensors from one enclosure.
    • 110–240VAC auto-sensing input and individual fused outputs simplify global installation.
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  • Save $208.01
    Lifesafety Power FPO75-D8PE2M Power supply board 75W 6A/12Vor 3A
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    Lifesafety Power FPO75-D8PE2M

    Lifesafety Power FPO75-D8PE2M Power supply board 75W 6A/12Vor 3A

    Compact 75W power supply designed for distributed camera and access control deployments where a single primary load (6A at 12VDC or 3A at 24VDC) must

    • Dual primary voltage (12VDC/6A or 24VDC/3A) suits PTZ heads, encoders, or camera hubs.
    • Eight isolated 2.5A auxiliary outputs eliminate separate power rails for cameras or door controllers.
    • E2M enclosure with Mercury back plate provides frame grounding and noise isolation at installation.
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  • Save $259.01
    Lifesafety Power FPO75-D8PE4H Power Supply 75W 6A/12 3A/24 8Aux
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    Lifesafety Power FPO75-D8PE4H

    Lifesafety Power FPO75-D8PE4H Power Supply 75W 6A/12 3A/24 8Aux

    75-watt power supply designed to distribute regulated voltage across access control, intercoms, and security endpoint infrastructure in mid-scale

    • Dual-voltage output (12VDC/6A and 24VDC/3A) supports mixed-voltage endpoint deployments.
    • Eight supervised auxiliary outputs enable centralized, monitored power distribution per channel.
    • PTC polyswitch protection self-resets after overcurrent, eliminating fuse replacement on site visits.
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  • Save $256.01
    Lifesafety Power FPO75-D8PE4M FPO75-D8PE4M
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    Lifesafety Power FPO75-D8PE4M

    Lifesafety Power FPO75-D8PE4M FPO75-D8PE4M

    75W auxiliary power supply designed to distribute regulated DC power to multiple surveillance and access-control loads in a single rack or

    • Selectable 12V/6A or 24V/3A main output matches your primary load at install.
    • Eight independent 2.5A Class 2 auxiliary channels eliminate cascading power failures.
    • 75W total capacity supports access-control clusters and sensor arrays in one zone.
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    Lifesafety Power FPO75-D8PE4M1 Power supply board 75W 6A/12Vor 3
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    Lifesafety Power FPO75-D8PE4M1

    Lifesafety Power FPO75-D8PE4M1 Power supply board 75W 6A/12Vor 3

    75W compact power distribution board designed to centralize and manage power delivery to networked IP cameras , access control readers, and allied

    • Selectable 12VDC/6A or 24VDC/3A output matches most IP camera and reader requirements.
    • Centralized 75W distribution eliminates individual wall transformers at each endpoint.
    • Single-board hub simplifies troubleshooting across multi-door or multi-camera deployments.
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  • Save $413.01
    Lifesafety Power FPO75-D8PW1M 75W Single Voltage 120 VAC 8 Auxil
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    Lifesafety Power FPO75-D8PW1M

    Lifesafety Power FPO75-D8PW1M 75W Single Voltage 120 VAC 8 Auxil

    75W single-voltage power supply rated for 120 VAC input, equipped with 8 auxiliary outputs

    • 75W capacity powers up to 8 auxiliary outputs from a single centralized source.
    • 120 VAC input integrates directly into standard circuits without additional conversion.
    • Eight parallel ports eliminate daisy-chained adapters in camera and access control runs.
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  • Save $127.01
    Lifesafety Power FPO75-E1 75W Svps E1 Cabinet
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    Lifesafety Power FPO75-E1

    Lifesafety Power FPO75-E1 75W Svps E1 Cabinet

    75W SVPS (Switched-Mode Power Supply) housed in a compact E1 cabinet enclosure

    • Dual-voltage output (6A at 12VDC or 3A at 24VDC) supports mixed-device deployments.
    • 75W power budget covers up to six 12W cameras plus auxiliary sensors in one unit.
    • Compact E1 cabinet enclosure enables wall-mount installation in tight IDF spaces.
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    Lifesafety Power FPO75-E1M 75W power supply 6A/12V or 3A/24V E1M
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    Lifesafety Power FPO75-E1M

    Lifesafety Power FPO75-E1M 75W power supply 6A/12V or 3A/24V E1M

    Compact 75W power supply designed to feed dual security circuits — typically access control, door locks, IP cameras , and auxiliary loads in

    • Dual selectable output — 6A @ 12VDC or 3A @ 24VDC — fits mixed-voltage retrofits.
    • 75W total capacity supports two mid-draw endpoints without oversizing the circuit.
    • Mercury back plate isolates circuits, reducing ground loops on long or multi-floor runs.
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    Lifesafety Power FPO75-E2 6A/12V Or 3A/24V E2 Enclosure
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    Lifesafety Power FPO75-E2

    Lifesafety Power FPO75-E2 6A/12V Or 3A/24V E2 Enclosure

    75W regulated power supply designed for access control systems, alarm panels, and distributed IP security equipment where reliable 12VDC or 24VDC

    • Selectable 6A/12V or 3A/24V output eliminates separate SKUs for mixed-voltage sites.
    • 75W regulated output sustains main ACU plus multiple readers without brownout risk.
    • E2 enclosure fits standard wall-mount and DIN-rail deployments in equipment rooms.
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    Lifesafety Power FPO75-E2M Mercury/Lnl Backplate In E2 Enclosure
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    Lifesafety Power FPO75-E2M

    Lifesafety Power FPO75-E2M Mercury/Lnl Backplate In E2 Enclosure

    75W auxiliary power supply housed in a compact E2 metal enclosure with Mercury/LNL backplate integration

    • 75W power supply with Mercury/LNL backplate integration
    • 6A @ 12V or 3A @ 24V output for access control loads
    • Compact E2 metal enclosure for door-side install
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    $567.00 $372.99 Save $194.01
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  • Save $243.01
    Lifesafety Power FPO75-E4M Mercury/Lnl Backplate In E4 Enclosure
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    Lifesafety Power FPO75-E4M

    Lifesafety Power FPO75-E4M Mercury/Lnl Backplate In E4 Enclosure

    75W power distribution unit housed in a steel E4 enclosure with Mercury/LNL backplate — the right choice when you need to feed multiple access

    • 75W output delivers 6A @ 12V or 3A @ 24V to match field device voltage needs.
    • Steel E4 enclosure provides a compact, wall-mounted housing for tidy installations.
    • Mercury/LNL backplate simplifies wiring connections for access control deployments.
    Usually Ships in 2-3 Weeks Free shipping over $499
    $710.00 $466.99 Save $243.01
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    Lifesafety Power FPO75-E4S Power supply board 75W 6A/12Vor 3A/24
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    Lifesafety Power FPO75-E4S

    Lifesafety Power FPO75-E4S Power supply board 75W 6A/12Vor 3A/24

    Compact power supply board rated for 75W output, delivering either 6A at 12VDC or 3A at 24VDC

    • Delivers 75W output at 6A/12VDC or 3A/24VDC from a single board SKU.
    • Board form factor fits cabinet- or wall-mount enclosures where space is limited.
    • Dual-voltage output eliminates separate SKUs for mixed 12V and 24V deployments.
    Usually Ships in 2-3 Weeks Free shipping over $499
    $710.00 $466.99 Save $243.01
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    Lifesafety Power FPO75-E5M 75W power supply 120 VAC AC Fault &
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    Lifesafety Power FPO75-E5M

    Lifesafety Power FPO75-E5M 75W power supply 120 VAC AC Fault &

    UL-listed, single-voltage 75W power module engineered for power supply infrastructure in access control deployments

    • UL-listed 75W module with field-selectable 12VDC or 24VDC output suits mixed lock deployments.
    • Built-in fire alarm disconnect unlocks doors on alarm signal without external relay hardware.
    • AC fault and system fault Form C contacts flag low battery, shorts, or blown fuse for fast diagnosis.
    Usually Ships in 2-3 Weeks Free shipping over $499
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    Lifesafety Power FPO75/150-2C82D8E2 Power supply board 75W 6A/12
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    Lifesafety Power FPO75/150-2C82D8E2

    Lifesafety Power FPO75/150-2C82D8E2 Power supply board 75W 6A/12

    75-watt board-mount power supply designed for distributed power architecture in IP security installations

    • Board-mount form factor integrates into custom enclosures and OEM power frames.
    • Dual-voltage output—12VDC @ 6A or 24VDC @ 3A—serves mixed device populations from one unit.
    • Select 24V mode on long cable runs to reduce voltage drop across extended security zones.
    Usually Ships in 2-3 Weeks Free shipping over $499
    $1,023.00 $671.99 Save $351.01
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Power & UPS

Power is the foundation of every surveillance, access-control, and network system. Centralized, supervised, battery-backed power keeps cameras recording, doors locking, and switches forwarding during outages and surge events. Choose components sized for your load — recorder UPS, camera supplies, PoE midspans, surge protection — and your system runs through the events that take down unmanaged installations.

Plan a Reliable Power System

  • Sized power supplies — 12V or 24V DC sized to total device load plus 25% headroom for spin-up, aging, and expansion.
  • UPS & battery backup — runtime sized to your outage profile, with managed shutdown for NVRs and access controllers.
  • PoE budgets — 802.3af, at, and bt midspans/switches sized for total port load, not just per-port maximum.
  • Surge protection & grounding — at the building entrance and at outdoor camera locations exposed to lightning.
  • Distribution & redundancy — rack PDUs, DIN-rail supplies for industrial cabinets, and dual-source feeds for life-safety loads.

Shop by Category

UPS & Battery Backup
Rack-mount and tower UPS units sized to NVR, switch, and controller load — line-interactive and double-conversion topologies for clean recovery.
Power Supplies
12V DC and 24V DC supplies for camera and access-control panels — sized by current draw with 25% headroom for surge and expansion.
PoE Injectors & Midspans
802.3af, 802.3at, and 802.3bt midspans for legacy switches — 15W to 90W per port for PTZ cameras, displays, and high-power readers.
Rack Power Supplies
19-inch chassis with distributed outputs — PTC fused, supervised, and battery-backup ready for multi-camera or access-control deployments.
DIN Rail Power Supplies
Industrial DIN-rail supplies for control cabinets — wide-range AC input, redundant pairing, and temperature-rated for harsh environments.
Power Delivery & Supplies
Centralized distribution panels, surge protection, and grounding products for organized, code-compliant low-voltage installations.
Surge Protectors
Inline Ethernet, coax, and AC surge suppressors for outdoor cameras, antenna runs, and equipment-room protection — critical for rooftop and pole-mount installations.

Featured Brands

Altronix
Access-control and CCTV power — rack and wall enclosures, battery backup, and FACP-compatible supervised power.
Lifesafety Power
Networked supervised power for access control and fire — Mercury, LenelS2, and Genetec integrations.
NETGEAR
PoE+ and PoE++ switches and midspans with high port-count power budgets for camera and Wi-Fi deployments.
Ubiquiti
UniFi PoE switches with managed budget per port — strong fit for IT-managed surveillance VLANs.
Cradlepoint
Cellular failover routers with PoE and dual-SIM for branch-site continuity when WAN drops.
Transition Networks
Industrial PoE++ media converters and ruggedized switches for outdoor, transportation, and utility deployments.

Buyer FAQ

How do I size a UPS for my surveillance system?
Add up the wattage of every device on the UPS — recorder, switch, monitor, controller, and PoE budget for the cameras — then add 25% headroom for spin-up and aging. Multiply by your target runtime (typically 15–30 minutes for managed shutdown, 4–8 hours for site continuity) to pick a VA rating. Our team can review your bill of materials and recommend a model — submit details via the contact form.
What's the difference between PoE, PoE+, and PoE++?
PoE (802.3af) delivers up to 15.4W per port — fine for fixed-lens cameras and basic readers. PoE+ (802.3at) lifts that to 30W — covers PTZ heaters, IR illuminators, and most multi-sensor cameras. PoE++ (802.3bt Type 3/4) runs up to 60W or 90W per port for high-power thermal cameras, displays, and access-control controllers. Pick a switch or midspan whose total budget covers the sum of per-port loads, not just the per-port maximum.
Why use a midspan instead of a PoE switch?
When you have an existing non-PoE switch you want to keep, a midspan (PoE injector) adds power without replacing the switch. Midspans also help when you need to upgrade a few high-power ports (60W or 90W) without buying an entire 802.3bt switch.
Do I need surge protection on outdoor cameras?
Yes — outdoor Ethernet runs collect induced energy during nearby strikes even when the camera isn't directly hit. Inline PoE surge protectors at the camera (or at the building entry) clamp the spike and protect the recorder/switch. Critical for any pole-mount or rooftop deployment.
How do I plan power for an access-control system?
Each door typically needs 1–2A at 12V DC (controller + reader + lock + REX). Multiply by door count, then size a supervised power supply (Altronix, Lifesafety) with battery backup matched to UL 294 / NFPA 72 hold-up time for your jurisdiction. Our Senior Specialist team has working integrators who size these systems daily.

Need help sizing your system?

Our team includes working integrators who size camera-system power, PoE budgets, and access-control supplies daily. Send your bill of materials, recorder count, and target runtime — we'll recommend the right UPS, supply, and midspans before you order.

Talk to a Senior SpecialistAbout IP Security Depot

Quick links to guides

Datacenter UPS Sizing Guide
Size a datacenter UPS in kW vs kVA, profile load, pick N+1 or 2N redundancy, and plan for AI rack densities of 40-100+ kW. Vert...
UPS Topology: Online vs Line-Interactive vs Offline
Compare online double-conversion vs line-interactive vs standby UPS topology. Selection matrix by use case, true cost trade-off...
Rack PDU Buyer's Guide
Basic, metered, monitored, switched PDU - and when each one earns its place. Plug references, phase config, dual-cord, brand co...
PoE Power Budget Planning
Size your PoE switch for surveillance and access control. PoE class reference, camera-count-by-wattage table, worked deployment...
Battery Backup Runtime Calculator
Free UPS runtime calculator. Enter load, battery voltage and Ah, chemistry (VRLA / lithium), depth of discharge, temperature. G...