NI PXIe-4112 Isolated Programmable Power Supply for PXI Express ATE and Functional Test

The NI PXIe-4112 is a single-channel, isolated DC power supply module built for PXI Express systems. From my experience, it’s a very practical choice when you need clean, tightly controlled DC power right inside the chassis—no bench supply clutter, no extra cabling. It delivers up to 60 W with precise voltage/current programming and integrated readback, which seems to be exactly what many ATE teams want for battery-powered devices, ECUs, sensor modules, or board-level bring-up. You might notice that tests run faster thanks to PXI backplane triggers and hardware sequencing through NI‑DCPower.

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• Warranty: 365 days
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We typically confirm model, revision, and test requirements up front, then book the order and share a tracking update as soon as it ships. Each unit goes through inspection and packaging suitable for sensitive electronics.

Key Features

• Isolated single-channel DC output (up to 60 W) – Clean, isolated power for reducing ground loops in mixed-signal test systems.
• Voltage/current programming with readback – Set and measure the actual output to tighten your test margins and catch drift early.
• Optimized output ranges – PXIe-4112 is typically used for low-voltage, higher-current loads (e.g., logic boards, RF modules, small motors).
• Remote sensing (2‑wire/4‑wire) – Compensate lead drops so the DUT receives the voltage you specify at its terminals.
• Integrated protection – Overvoltage, overcurrent, and thermal protection help safeguard both the instrument and your DUT.
• PXI Express synchronization – Use PXI trigger lines and NI‑DCPower sequencing to coordinate with DMMs, SMUs, and switch matrices.
• NI‑DCPower driver support – Program via LabVIEW, C/C#, .NET, and in many cases Python, for quick integration into existing frameworks.

Technical Specifications

Related or Supporting Products

• NI PXIe-4113 – Same family with a higher voltage / lower current range (commonly used around 20 V, 3 A). Good when your DUT needs more headroom on voltage at the same 60 W power level.
• NI PXI-4110 – Triple-output programmable DC supply for legacy PXI systems; handy if you need multiple rails in one module (not PXIe).
• NI PXIe-4139 – Precision SMU for sourcing and measuring with tighter accuracy and pulsing; not a drop-in replacement, but ideal when you need metrology-grade measurements.
• PXIe Chassis & Controllers – Pair with NI PXIe-1082 or similar chassis and an embedded controller like NI PXIe-8880 for a complete, high-throughput ATE setup.
• Cabling & Terminal Accessories – Use appropriate gauge wiring for up to 6 A loads and remote sense leads; shielded harnesses help keep noise in check.

Installation & Maintenance

• Cabinet & chassis placement: Install in a PXI Express 3U chassis with unobstructed airflow. Keep intake/exhaust paths clear; avoid blanking off fan intakes.
• Ventilation: Maintain chassis ambient typically within 0–55 °C. In many cases, reserving an adjacent slot improves cooling when running near 60 W continuously.
• Wiring: Use proper gauge conductors for the current (e.g., 6 A applications benefit from low-resistance, short leads). Enable 4‑wire sense to regulate voltage at the DUT terminals; twist sense pairs and route away from high-current paths.
• Safety precautions: Verify output limits and protection settings before enabling. Set OVP/OCP aligned with DUT specs. De-energize before re-terminating front connections.
• Routine maintenance: Dust the front panel and chassis filters periodically. Keep firmware/driver (NI‑DCPower) up to date; in production lines, an annual calibration interval is common to sustain accuracy.
• Software setup: NI‑DCPower provides soft front panels for quick checks and APIs for automation (LabVIEW, .NET/C#, and often Python). Hardware triggering through the PXI backplane simplifies multi-instrument test steps.

Quality & Certifications

• Certifications (typical): CE and RoHS compliance; many NI PXIe modules also meet relevant EMC and safety requirements. UL or similar safety listings may apply depending on revision.
• Manufacturer standards: Produced under ISO 9001 quality systems.
• Warranty: We provide a 365‑day warranty. NI’s standard limited warranty is typically one year; contact us if you need alignment with your on-site spares strategy.

One thing I appreciate is how the PXIe‑4112 fits straight into a synchronized PXI rack—no bench supply footprint, fewer cables, and tighter timing with your measurement modules. If your test plan leans on repeatable DC sourcing with quick reconfiguration, this module usually pays for itself in setup time alone.