Altronix OLS350 Single-Output 24VDC Power Supply Board
The Altronix OLS350 is a board-mounted DC power supply designed for security integration and control system applications where space is tight and voltage flexibility matters. It accepts 220VAC mains input and delivers regulated 24VDC or 12VDC output with field-selectable configuration—meaning you can set the voltage at installation to match your specific control circuit requirements without stocking multiple SKUs. This is a genuine space-saver in cabinet and panel builds where every cubic centimeter counts.
Key Features
- Selectable Output Voltage: Configure at installation for either 12VDC @ 1A or 24VDC @ 0.5A. You pick the voltage once; no need to redesign or order a different model if your load spec changes between 12V and 24V devices. Useful in mixed deployments where some circuits run 12V door hardware and others need 24V signaling.
- 220VAC Input: Pulls from standard international AC mains, eliminating the need for a separate step-down or regional power conditioning in facilities with 220V infrastructure. Simplifies logistics if you're integrating across EU or international locations.
- Regulated DC Output: Maintains stable voltage under load variation—critical for access control readers, alarm signaling circuits, and sensor interfaces that expect clean, consistent power. Voltage droop or sag can cause false alarms or missed reads; the OLS350's regulation keeps that noise out.
- Board-Level Form Factor: Direct PCB mounting or compact enclosure integration means no separate rack space or external power supply footprint. If you're building a custom control module or retrofitting a legacy panel, this board slips into your design without expanding the overall cabinet.
- CE Certification: Meets European safety and electromagnetic compatibility standards, so your compliance checklist for European deployments includes this component without further testing or documentation burden.
- Single Output Channel: One regulated output simplifies circuit topology in compact applications. No multi-channel switching logic to manage—just input, regulation, and output.
Integration and Deployment Context
The OLS350 is purpose-built for power infrastructure roles in access control cabinets, alarm panel auxiliaries, and distributed control nodes. Integrators typically deploy it where a traditional wall-mount supply is overkill—think compact door controller modules, standalone reader power nodes, or embedded auxiliary circuits in larger assemblies. The board-level design also suits OEM equipment manufacturers embedding regulated 24V or 12V subsystems into their products.
The selectable voltage output is a genuine operational advantage: you can standardize on a single part number for projects mixing 12V and 24V loads, then program each board's jumper or solder pad during assembly. This cuts inventory complexity without sacrificing compatibility.
Thermal and Reliability Considerations
Board-level components require adequate airflow and thermal clearance in their mounting environment. If the OLS350 is soldered directly onto a larger PCB or mounted in a sealed enclosure, ensure ambient temperature stays within the operating range and that the surrounding circuitry doesn't introduce localized heat buildup. At 0.5A output (24V) or 1A output (12V), power dissipation is modest, but passive mounting without active cooling demands design attention in warm climates or high-duty applications.
When to Choose a Different Approach
If you need higher current capacity—say, 2A or more at 24VDC—or dual independent outputs for isolated circuits, consider a larger external power supply unit instead. The OLS350 is single-output and current-limited; it's not meant to power a bank of cameras or heavy solenoid arrays. For high-reliability, redundancy-critical systems, also evaluate whether board-mount is compatible with your maintenance and replacement workflow; swapping a daughterboard is different from plugging in a wall-mounted supply.
Frequently Asked Questions
Q: Can I use the OLS350 for both 12V and 24V outputs simultaneously?
A: No. The OLS350 is configured for either 12VDC @ 1A or 24VDC @ 0.5A at installation. You select one output voltage and cannot switch between them in the field without re-configuring the board (typically via jumper or solder pad). If you need both voltages in the same system, deploy two separate OLS350 boards.
Q: What input voltage range does the OLS350 accept?
A: The OLS350 is designed for 220VAC input. Verify your facility's AC mains voltage before installation. If your site uses 110VAC, 240VAC, or 100-240VAC multi-range supply, the OLS350 is not suitable; consult Altronix for region-specific models or use an external step-up/step-down transformer.
Q: Can I mount the OLS350 in a DIN rail cabinet?
A: The OLS350 is a bare board or minimal-packaging component; it does not include DIN-rail mounting hardware. You must integrate it into a control enclosure, solder it to a larger PCB, or mount it on a custom bracket. DIN-rail cabinets require external power supplies or distribution boards—not direct board placement.
Q: Is thermal management required in high-temperature environments?
A: At rated output (0.5A @ 24V or 1A @ 12V), the OLS350 dissipates modest power, but board-level components are sensitive to ambient temperature. Confirm operating range matches your environment. In enclosures above 50°C ambient or without ventilation, validate that component ratings (capacitors, regulators) tolerate the thermal load, or add external cooling.
Q: Does the OLS350 include surge or overcurrent protection?
A: Regulation is built-in, but verify the specific protection scheme (fusing, current-limit topology, or over-temperature shutdown) in the datasheet. If your application requires explicit surge clamping or external fusing for safety isolation, plan upstream protection accordingly.
Q: What certifications does the OLS350 hold?
A: The OLS350 carries CE certification, meeting European safety and EMC standards. If NDAA Section 889, TAA, or other regulatory compliance is required, confirm with Altronix before selection.
Ted PerryPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
I've specified the Altronix OLS350 in several panel-mount and cabinet integration projects where space constraints and mixed 12V/24V load profiles demand a compact, configurable solution. The board form factor and field-selectable voltage have proven valuable in custom control module designs, and the CE approval simplifies compliance documentation for European deployments. The OLS350 is not a universal workhorse—it's a precision tool for tight spaces and standardized power needs.
Technical Highlights:
- Voltage Selectability (12VDC @ 1A or 24VDC @ 0.5A): Eliminates SKU duplication when integrating projects with both 12V readers and 24V signaling circuits. You configure once at assembly; no field rewiring or board swaps needed if you later add a 12V lock to a 24V-dominant system.
- 220VAC Input: Matches European and international standard mains, avoiding the need for regional step-down supplies. If your facility backbone is 220V three-phase with 220V single-phase circuits, this board integrates natively without isolation transformers.
- Board-Level Integration (saves cabinet real estate): At 0.5A output, the OLS350 dissipates roughly 12W at 24VDC. Solder it directly to a custom control PCB or mount on a bracket in a compact enclosure—no external PSU footprint. Critical in retrofit projects where cabinet space is already maxed out.
- Regulated Output (stable under load variation): Access control readers and alarm circuits expect clean power. The regulation keeps output voltage tight as current draw fluctuates, reducing false triggers in sensitive signaling chains.
Deployment Considerations:
- Board-level packaging demands integration planning: Unlike a wall-mount supply, the OLS350 requires PCB-level design or custom mounting. If you're used to plug-and-play external supplies, account for design and assembly time.
- Thermal design matters in sealed enclosures: With modest output current (0.5A @ 24V), heat dissipation is manageable, but board-level components are sensitive to ambient temperature. In warm or poorly ventilated cabinets, validate that regulators and electrolytic capacitors stay within operating range.
- Single output only—no redundancy: If one board fails, the entire powered circuit goes dark. For critical access points, consider redundant power distribution or design a secondary supply path.
- 220VAC input is not adjustable: If your facility mains drifts outside nominal range or uses a different voltage standard (110VAC, 240VAC), the OLS350 will not auto-compensate. Verify input voltage compatibility before specifying.
Best-fit scenario: OLS350 shines in custom access control enclosures, distributed reader power nodes, or embedded control subsystems where cabinet space is at a premium, you're mixing 12V and 24V loads, and your facility uses 220VAC mains. Skip it if you need high current (2A+), dual isolated outputs, or wall-mount simplicity.
