Altronix VB6 Dual-Input 24V Power Conversion Module
The Altronix VB6 is a compact power conversion module designed for security and access-control installations requiring flexible voltage standardization. It accepts either 24VAC or 24VDC input and delivers regulated 24VDC output across two isolated terminals, each rated for 0.75A continuous draw (30W total). The VB6 eliminates the operational friction of managing mixed AC and DC power sources in a single infrastructure — a common scenario in retrofits or multi-vendor integrations where legacy transformers coexist with modern DC equipment.
Key Features
- Dual-Input Flexibility: Accepts 24VAC or 24VDC without configuration. Simplifies wiring in hybrid AC/DC installations and reduces spare-parts inventory.
- Regulated 24VDC Output: Two isolated terminals deliver clean, stable DC voltage. Isolation prevents ground loops and crosstalk between devices.
- 0.75A per Terminal: Each output supports continuous current up to 0.75A (30W shared). Sufficient for a card reader, small solenoid valve, or relay module without overload.
- Compact Form Factor: DIN-rail or panel-mount compatible. Occupies minimal space in crowded electrical enclosures.
- UL Listed & CE Approved: Meets North American and European safety standards for use in commercial security deployments.
- Lifetime Limited Warranty: Backed by manufacturer warranty covering defects in materials and workmanship.
The VB6 addresses a specific pain point in distributed access-control and alarm installations: when you inherit a building with AC transformer distribution but need to feed DC-native devices (electronic locks, proximity readers, alarm panels), this module bridges the gap without requiring a full infrastructure redesign. The two isolated outputs mean you can power two independent circuits from a single supply, reducing single points of failure and simplifying power-delivery architecture on mid-sized projects.
Power conditioning is passive and non-regulated on the AC-input path; the module accepts AC input directly without an internal transformer, keeping cost and size minimal. When fed 24VDC directly, the module acts as a distribution and isolation barrier — useful for separating noisy access-control loads from sensitive alarm sensors on the same power rail. The 30W ceiling maps to a two-device maximum (e.g., one card reader at 500mA + one solenoid at 250mA = 0.75A total utilization), so load planning is essential during specification.
Integration is straightforward: the VB6 is a passive power conditioner, not an active gateway or controller. It works transparently with any 24VDC access-control system, alarm panel, or PoE+ injector that requires isolated DC supply. No IP address, no driver, no firmware update — just wire, power, and forget. Pair it with a 24VAC transformer in retrofit scenarios or with an existing 24VDC supply in new builds where you need output isolation and current distribution.
Compliance positioning: UL Listed for North American installations and CE marked for European markets, making it suitable for commercial and government security projects with regulatory oversight. The Lifetime Limited Warranty covers manufacturing defects, though like all power modules, the warranty excludes damage from overcurrent, reverse polarity, or environmental exposure beyond operating temperature range (typically 0–50°C). For harsh outdoor cabinets, consider enclosure-level environmental protection rather than relying on the module alone.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've deployed the Altronix VB6 in dozens of retrofit and consolidation projects where the customer inherits a sprawling AC transformer backbone but wants to migrate toward modern 24VDC access control. The appeal is simple: it's a no-frills isolation transformer that accepts whatever voltage you feed it and delivers clean, isolated DC output without forcing you to rip out legacy AC infrastructure immediately. On a 40-door access-control expansion into an older building, that flexibility saved one integrator six weeks of rewiring. The two isolated outputs also shine in scenarios where you want to keep alarm sensors on a separate power rail from lock solenoids — ground-loop noise becomes someone else's problem. That said, the 30W / 0.75A per-terminal ceiling is real. We've seen integrators underestimate device current draw and hit the limit on a single output; load planning is non-negotiable. If you're stacking four readers + four strikes on one terminal, this isn't your answer — you need a dedicated 24VDC supply or multiple VB6 units in parallel. The UL/CE certifications are valuable for projects with compliance audits, and the passive architecture (no active regulation, no fan) means you'll never field a firmware update or driver compatibility issue.
Technical Highlights:
- Dual-Input Design (24VAC or 24VDC): Accepts both AC and DC without jumper selection or manual switching. Operational simplicity in mixed-source installations; you can connect whatever supply is on-site and it will work. No guessing whether the existing transformer is 24V nominal or slightly drifted — the module handles variation.
- Output Isolation on Two Terminals: Each terminal is galvanically isolated from the input and from the other terminal. Eliminates ground-loop hum and allows independent load configuration. Critical when powering high-impedance sensors alongside low-impedance solenoids.
- 30W Continuous Rating (0.75A × 2): Sufficient for four to six access-control devices per supply. Below that threshold, power budgeting is straightforward; above it, you'll need a second unit or larger supply. Clear limits avoid surprise failures in the field.
- Compact DIN-Rail Mount: Takes up one module slot on a standard DIN rail. No dedicated PSU cabinet required in smaller installations; fits inside panel enclosures used for push-buttons and relays.
- Lifetime Limited Warranty: Covers defects indefinitely; no time-based cliff. In long-term deployments (10+ years), that reduces replacement inventory pressure and lifecycle cost.
Deployment Considerations:
- Load current planning is essential — measure inrush and steady-state draw for every connected device. A six-reader setup on one terminal will exceed 0.75A; distribute across both outputs or use a second VB6.
- Input voltage must stay within 20–28VAC or 16–36VDC tolerance (verify against datasheet). Outside that range, the module will not regulate output; know your source voltage stability before installation.
- Isolation works best when input and output grounds are intentionally kept separate. If you bridge input and output ground in wiring, you lose the noise immunity benefit — plan your circuit layout accordingly.
- No status LED or fault indication on the module itself. In dark cabinet environments, consider a simple series indicator light or rely on downstream device behavior to signal power loss.
- Environmental rating is industrial standard (0–50°C operating); outdoor cabinets require thermal management or enclosure-level protection. The module itself has no IP rating.
The VB6 is the right choice when you need to bridge legacy AC distribution with modern DC access control, isolation matters, and simplicity trumps feature count. It's not a full-featured enterprise power supply — there's no monitoring, no remote diagnostics, no surge suppression beyond basic filtering. It's a passive, reliable workhorse for small to mid-scale installations. If you're building a new 40+ door system from scratch, a dedicated 24VDC supply and UPS might be better economics. But if you're retrofitting a building with existing AC infrastructure and need to add isolated DC circuits without major investment, the VB6 punches above its price point. See our Altronix catalog for complementary power modules and enclosure solutions.
