MEAN WELL
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CCTV and Security Power Supplies with Battery Backup
MEAN WELL power supplies for CCTV cameras, access control and alarm panels: UPS-function supplies that charge a backup battery and keep cameras recording through a power cut, DIN rail security models and 12V adapters for single cameras.
- 13.8VFloat voltage for 12V lead-acid backup batteries
- UPS functionLoad output plus battery charging in one unit
- AC fail · Battery lowAlarm signals on the series that list them
How it works
How a UPS-function power supply works
A UPS-function supply has two jobs: it powers the cameras or panel, and it charges a sealed lead-acid battery. When AC fails, the battery takes over the load without a gap. For 12V systems the output sits at about 13.8V, the float voltage of a 12V lead-acid battery (for example AD-55 and SCP-50 datasheets).
AC input → UPS-function supply → cameras / panel (load output)
UPS-function supply ⇄ backup battery (charging, then discharge on AC fail)
Alarm outputs: AC fail / battery low to the recorder or panel (on models that have them)
12V
12V CCTV power supplies (PSC-xxA, AD-xxA, SCP-xx-12)
The A-versions are the 12V (13.8V) models. They are available by quote; tell us the camera load and battery size.
PSC
PSC series
Single output with battery charger (UPS function), with alarm signals for AC OK and battery low on the PSC-60.
AD
AD series
Single output with battery charger (UPS function): 13.8V on the AD-55A, with AC fail and battery low signals.
SCP
SCP series
Single output supply with 13.8V output on the 12V model and AC OK / AC fail signal (SCP-50 datasheet).
UPS-function security supplies (PSC, AD, ADD, SCP, LAD)
These supplies power the cameras or panel and charge a backup battery in one unit; their specs list a battery charger or UPS function. Output voltage, battery type and alarm signals vary by model; check the datasheet.
Show all 50 models (42 more)
- PSC-100A-C100.05 W· 13.8 V· 4.75 ARequest a quote
- PSC-100B100.74 W· 27.6 V· 2.4 ARequest a quote
- PSC-100B-C100.74 W· 27.6 V· 2.4 ARequest a quote
- PSC-160A160 W· 13.8 V· 7.6 ARequest a quote
- PSC-160A-C160 W· 13.8 V· 7.6 ARequest a quote
- PSC-160B160 W· 27.6 V· 3.8 ARequest a quote
- PSC-160B-C160 W· 27.6 V· 3.8 ARequest a quote
- AD-55A51.38 W· 13.8 V· 3.5 ARequest a quote
- AD-55B53.92 W· 27.6 V· 1.8 ARequest a quote
- AD-155A155 W· 13.8 / 13.3 V· 10.5 / 0.5 ARequest a quote
- AD-155B151.55 W· 27.6 V· 5 ARequest a quote
- AD-155C156.5 W· 54 V· 2.7 ARequest a quote
- ADD-55A52.58 W· 13.8 V· 2.5 ARequest a quote
- ADD-55B55.12 W· 27.6 V· 1.3 ARequest a quote
- ADD-155A152.75 W· 13.8 V· 9.5 ARequest a quote
- ADD-155B152.75 W· 27.6 V· 4.5 ARequest a quote
- ADD-155C149.9 W· 54 V· 2.3 ARequest a quote
- SCP-35-1235.9 W· 13.8 V· 2.6 ARequest a quote
- SCP-35-2438.6 W· 27.6 V· 1.4 ARequest a quote
- SCP-50-1249.7 W· 13.8 V· 3.6 ARequest a quote
- SCP-75-1274.5 W· 13.8 V· 5.4 ARequest a quote
- SCP-75-2474.5 W· 27.6 V· 2.7 ARequest a quote
- LAD-120A120 W· 13.8 / 13.8 V· 8.7 / 1 ARequest a quote
- LAD-120B120 W· 27.6 / 27.6 V· 4.4 / 1 ARequest a quote
- LAD-120C120 W· 41.5 / 41.5 V· 2.9 / 1 ARequest a quote
- LAD-120D120 W· 55.2 / 55.2 V· 2.21 / 1 ARequest a quote
- LAD-240A240 W· 13.8 V· 16.4 ARequest a quote
- LAD-240B240 W· 27.6 V· 7.7 ARequest a quote
- LAD-240C240 W· 41.5 V· 4.78 ARequest a quote
- LAD-240D240 W· 55.2 V· 3.4 ARequest a quote
- LAD-360B360 W· 27.6 V· 11.5 ARequest a quote
- LAD-360BU360 W· 27.6 V· 11.5 ARequest a quote
- LAD-360C360 W· 41.5 V· 7.14 ARequest a quote
- LAD-360CU360 W· 41.5 V· 7.14 ARequest a quote
- LAD-360D360 W· 55.2 V· 5.03 ARequest a quote
- LAD-360DU360 W· 55.2 V· 5.03 ARequest a quote
- LAD-600B600 W· 27.6 V· 18.74 ARequest a quote
- LAD-600BU600 W· 27.6 V· 18.74 ARequest a quote
- LAD-600C600 W· 41.5 V· 11.45 ARequest a quote
- LAD-600CU600 W· 41.5 V· 11.45 ARequest a quote
- LAD-600D600 W· 55.2 V· 7.87 ARequest a quote
- LAD-600DU600 W· 55.2 V· 7.87 ARequest a quote
View all PSC models →View all SCP, AD, ADD and LAD models →Security & specific power supplies →
Single camera
12V adapters for single cameras (GST)
For one or two cameras without battery backup, a desktop adapter is the simplest option.
24V
24V systems (PSC-xxB, AD-xxB, DRC-xxB)
B-versions provide 24V-class output for 24V cameras, PTZ heaters and larger access control systems with a 24V battery bank (two 12V batteries in series). Available by quote.
DIN rail
DIN rail security and DC UPS (DRC, DRS, DR-UPS, DUPS)
For security cabinets with DIN rail. The DRS-240-24 combines a 24V supply, battery charger and DC UPS function with AC fail and battery low signals. DRC models add a UPS function, and DR-UPS40 and DUPS modules add battery backup to an existing 24V supply.
Show all 17 models (9 more)
- DRS-240-12240 W· 12 V· 20 ARequest a quote
- DRS-240-36240 W· 36 V· 6.6 ARequest a quote
- DRS-240-48240 W· 48 V· 5 ARequest a quote
- DRS-480-24480 W· 24 V· 20 ARequest a quote
- DRS-480-36480 W· 36 V· 13.3 ARequest a quote
- DRS-480-48480 W· 48 V· 10 ARequest a quote
- DR-UPS4024 V· 40 ARequest a quote
- DUPS20Request a quote
- DUPS4021 V· 40 ARequest a quote
Battery
Sizing the battery: backup time example
Battery capacity (Ah) ≈ load current (A) × backup time (h) ÷ 0.8, so you do not run the battery flat. Then check that the supply can charge that battery in a reasonable time.
Example: 8 cameras × 0.5 A = 4 A at 12V. For 4 hours of backup: 4 A × 4 h ÷ 0.8 = 20 Ah, so a 12V 20 Ah battery or larger.
Battery (Ah) ≈ load (A) × hours ÷ 0.8
Supply rating ≥ (load current + charging current) × voltage
Panels
Access control and alarm panels (battery-low and AC-fail signals)
Access control and alarm panels need to know when they are running on battery. Choose a supply with alarm outputs: PSC-60 (AC OK and battery low), AD-55 (AC fail and battery low), SCP-50 (AC OK / AC fail) and DRS-240 (AC fail and battery low), and wire them to the panel inputs.
Related resources
Security & specific power suppliesUPS-function and security models.→PSC seriesSupplies with battery charger.→AD / SCP series13.8V security supplies.→DRS seriesDIN rail DC-UPS.→DRC seriesDIN rail with battery charger.→Adapters12V and 24V adapters.→Find your MEAN WELL power supplySearch by voltage, wattage and type.→Request a quoteInstaller and project quantities.→
CCTV power supply FAQs
What power supply do I need for 4/8/16 security cameras?
Add the current of all cameras at their voltage and divide by 0.8. Example: 8 cameras × 0.5 A = 4 A at 12V, so at least 5 A (60 W) plus the battery charging current if you want backup.
Why do CCTV power supplies output 13.8V instead of 12V?
13.8V is the float voltage of a 12V sealed lead-acid battery. A 13.8V output keeps the backup battery charged while powering 12V cameras, which accept that voltage.
How long will a battery backup run my cameras?
Roughly battery Ah × 0.8 ÷ load current. A 20 Ah battery with a 4 A load gives about 4 hours. Cold, battery age and camera IR at night reduce it.
PSC vs AD vs SCP: what's the difference?
PSC and AD are supplies with a built-in battery charger (UPS function). SCP is a 13.8V supply with an AC OK / AC fail signal. Check the battery charging current and alarm outputs in each datasheet.
Can I use a DIN rail UPS supply in an access control panel?
Yes, if the panel has DIN rail and the voltage matches. The DRS-240-24 provides 24V with battery charging, DC UPS function and AC fail / battery low signals.
Do I need alarm signals (AC fail / battery low)?
For monitored systems, yes: they tell the recorder or panel when mains is lost and when the battery is about to run out, so it can report and shut down cleanly.
Need help choosing?
Send the number of cameras, their current at 12V or 24V and the backup time you need to sales@htdelectronics.com, or request a quote.