Altronix OLS75 Single-Output 12/24VDC Power Supply Board
The Altronix OLS75 is a board-level offline switching power supply designed for embedded integration into access control panels, security controllers, and distributed camera networks. It accepts 115/230VAC input and delivers regulated 12 or 24VDC output with integrated power supervision — all in a compact form factor suited to OEM designs and retrofit applications where space or thermal constraints rule out full-sized enclosure units.
Key Features
- Offline switching topology: Converts 115/230VAC to DC with high efficiency and minimal heat dissipation — critical in confined equipment enclosures where thermal management adds cost and complexity.
- Dual-voltage input acceptance (115VAC and 230VAC): Eliminates the need for voltage-specific SKUs; a single board handles both North American and international deployments without hardware changes.
- Selectable output voltage via jumper (12VDC or 24VDC): Field-configurable to match your control logic and sensor rail voltage — no need to stock two different boards for mixed deployments.
- Single regulated output with 10A capacity @ 12VDC or 0.5A @ 24VDC: At 12VDC, supports door locks, solenoids, and LED indicators totaling ~120W; at 24VDC, delivers up to 12W for proportional loads like motorized actuators or distributed sensor nodes.
- Integrated power supervision: Monitors output voltage and current; reports faults to the host controller via status lines — removes the need for external monitoring relays and improves system uptime visibility.
- Board form factor: Mounts directly to a PCB or panel surface with minimal footprint — valuable in retrofit scenarios where space inside existing panels is limited, and in new OEM designs where integration density matters.
- Lifetime Limited Warranty: Altronix backs the product indefinitely against manufacturing defects, reducing lifecycle cost of replacement inventory and simplifying warranty tracking across installed base.
Integration & Compatibility
The OLS75 is purpose-built for embedding in access control panels and modular security equipment where reliability and compact power conversion are non-negotiable. The board accepts standard 115/230VAC mains input (no external transformer required) and outputs clean, regulated DC suitable for driving low-voltage logic, solenoids, and supervised circuits. Its jumper-selectable voltage means a single SKU can serve both 12VDC legacy systems and newer 24VDC standardized designs — a practical advantage in mixed-technology environments.
The integrated supervision circuitry can detect low-voltage, overcurrent, and thermal fault conditions, making it suitable for supervised power distribution architectures found in enterprise access control and distributed camera networks. The board's compact profile allows integration into tight spaces without requiring external heat sinks or forced-air cooling in most applications.
Deployment Considerations
The OLS75 is optimized for OEM integration and panel-mounted retrofit installations. Integrators should verify that the board's single output capacity (10A @ 12VDC, 0.5A @ 24VDC) matches the aggregate load of all devices on the power rail — if you're supplying multiple locks, zone modules, or camera PoE injectors from a single output, total draw can quickly exceed the board's rating. For applications requiring higher current or multiple independent regulated outputs, consider higher-capacity power supply boards in the Altronix lineup. Input voltage must be within 115/230VAC range; three-phase or unusual mains configurations require external step-down or conditioning. The board generates minimal heat under normal operation, but in high-ambient-temperature enclosures (above 60°C ambient), verify thermal headroom to avoid nuisance resets.
Frequently Asked Questions
Q: Can the OLS75 be field-jumpered to switch between 12VDC and 24VDC output?
A: Yes. The output voltage is selectable via jumper configuration, allowing the same board to be set to either 12VDC or 24VDC depending on your control system's rail voltage. This is a one-time configuration, not a runtime switch.
Q: What is the current capacity at each output voltage?
A: The OLS75 delivers 10A at 12VDC (120W) or 0.5A at 24VDC (12W). Choose 12VDC for higher-power loads like solenoid locks; use 24VDC for lighter distributed sensor or camera-PoE-injector applications.
Q: Does the OLS75 include a fan or require active cooling?
A: No. The offline switching topology and board form factor dissipate heat passively. In standard panel enclosures and ambient temperatures up to ~50°C, no forced-air cooling is needed. In extreme ambient or continuous full-load conditions, monitor enclosure temperature to avoid thermal throttling.
Q: Can I use the OLS75 in a retrofit panel upgrade?
A: Yes. The board's compact size and dual-voltage input flexibility make it suitable for retrofit projects. It can be mounted directly to existing PCBs or panel rails, and its supervision output integrates with host controller logic for fault reporting.
Q: What does "integrated power supervision" mean?
A: The board monitors its output voltage and current, detecting low-voltage or fault conditions. It can signal these states to the host controller via status lines, enabling real-time power health monitoring without external relays.
Q: What warranty does the OLS75 carry?
A: Altronix backs the OLS75 with a Lifetime Limited Warranty against manufacturing defects, reducing long-term replacement costs and simplifying warranty administration.
Ted PerryPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The Altronix OLS75 is a solid choice for OEM integrators and panel retrofit work where you need regulated, supervised power in a tight space. The offline switching architecture delivers 10A at 12VDC with minimal heat — a real advantage when you're packing the board into an existing enclosure and can't afford thermal issues. The dual-input voltage acceptance and jumper-selectable 12/24VDC output mean you can standardize on a single SKU across multiple projects, which simplifies inventory and reduces deployment lead time.
Technical Highlights:
- 10A @ 12VDC output capacity: Supports aggregate loads up to 120W — enough for solenoid locks, zone modules, and indicator circuits without requiring external power distribution. At 24VDC, the 0.5A ceiling is tighter; verify your actual circuit load before committing.
- Integrated power supervision with status monitoring: Real-time fault detection (low-voltage, overcurrent) signals to the host controller, eliminating the need for external monitoring relays and improving system observability in distributed architectures.
- Passive thermal design: Offline switching topology and board-level integration mean no fan, no active cooling, and minimal maintenance — important in unattended panel closets or outdoor cabinets where you want to avoid mechanical failures.
Deployment Considerations:
- At 24VDC, maximum output is only 0.5A (12W total) — this is a hard ceiling. If your 24V camera PoE injector draws 1A, the OLS75 cannot supply it alone; you'll need a higher-capacity supply or a dedicated secondary output.
- The board is board-mounted; ensure your panel enclosure design accounts for PCB clearance and creepage distances for safety compliance. Standard access control and fire safety codes apply.
Deploy the OLS75 for access control panel upgrades, modular security equipment designs, and retrofit projects where compact, regulated, supervised power is the bottleneck. In high-availability systems requiring redundant power rails, consider installing two OLS75 boards on independent AC feeds with a diode-OR backplane — a common pattern in critical entry-control architectures.
