Altronix HUBWAYDVI Passive UTP Balun 24VAC to 12VDC

We've deployed the Altronix HUBWAYDVI across dozens of retrofit surveillance and access-control jobs, and it consistently solves a real pain point: converting legacy 24VAC infrastructure into dual-purpose cabling runs. The passive design is the key differentiator—no power supply to fail, no rack space consumed, no configuration. On a 16-camera retrofit where you're running new UTP but the existing 24VAC transformer is already in place, dropping a HUBWAYDVI at each camera end costs maybe $30 in materials and 15 minutes per drop, versus trenching a new 18/2 power line to each device. The isolation transformer embedded in the passive circuit prevents ground-loop hum that often plagues unshielded twisted pair when video and 24VAC run together. We've seen this matter most in analog-to-HD conversions where legacy twisted-pair infrastructure is being repurposed; the 12VDC output is stiff enough for cameras, door controllers, and compact intercom modules, but not for high-current loads like motorized lenses or heater blowers—you'll know quickly if you've exceeded the power budget because voltage sag becomes visible on the device being powered.

Technical Highlights:

• Passive isolation topology: The transformer winding provides electrical isolation between input and output—critical for suppressing ground-loop noise in analog video chains and preventing RF coupling into access-control signaling. No active circuitry to drift or fail.
• 24VAC/28VAC input range: Accepts standard transformer-based security system supplies, recorder power outputs, and legacy surveillance PSUs. Works with both 60Hz and 50Hz mains-derived supplies.
• 12VDC isolated output: Output voltage is stable under light-to-moderate DC loads (up to ~500mA depending on input line impedance); ideal for cameras, relays, and door-strike accessories. Not a regulated supply—voltage sag is gradual, not abrupt.
• Single output, minimal footprint: One 12VDC terminal pair keeps the device compact and easy to wire; no branching logic or configuration required.
• UL Listed, lifetime warranty: Passive components have no wear-out mechanism; the lifetime limited warranty reflects genuine product durability. UL listing covers commercial and industrial installations.

Deployment Considerations:

• The HUBWAYDVI is a passive device—input voltage and load impedance directly affect output DC voltage. Keep connected load under 500mA and use relatively short UTP runs (under 300 feet) to minimize voltage drop on the twisted pair itself. Measure output voltage at the load with a multimeter during commissioning.
• Isolation is excellent for audio and video, but the 12VDC output is unregulated. If you need tight voltage tolerance (e.g., 12VDC ±10%) for a sensitive access-control module, consider an active regulated supply instead. This device is better suited to cameras and simple relay loads that tolerate ±1V swing.
• Each HUBWAYDVI unit provides one 12VDC output. If you need multiple isolated 12VDC feeds at a single location, you'll need multiple baluns or a separate power distribution module. Plan your power architecture before ordering.
• Test continuity on the input 24VAC line and output 12VDC before final installation. A failed transformer winding will show continuity but no output voltage—rare, but it happens. Spare units on your truck save callbacks.
• Works seamlessly with Altronix power supplies, multiplexers, and cabling ecosystems. Pair with existing twisted-pair infrastructure or new CAT5e/CAT6 runs depending on your retrofit scope.

The HUBWAYDVI is the right choice for integrators consolidating power and video over existing UTP in small-to-medium access-control or hybrid analog/IP surveillance projects, especially where transformer-based 24VAC is already on site. Explore complementary Altronix power conditioning and distribution modules in the Altronix catalog.