The National Instruments PXIe-4112 is a programmable power supply module for PXI Express systems. It provides controlled DC output for powering devices under test, setting bias levels, and supplying reference voltages in automated test and validation systems. The module integrates with other PXI Express instruments in a single chassis, which reduces external cabling and simplifies test system architecture.
Programmable power supplies are used when a test must apply a defined voltage or current and monitor the resulting behavior. The PXIe-4112 brings this capability into the PXI Express platform. Engineers can control output values in software and synchronize power changes with measurements.
Programmable DC Output
The module provides programmable DC output channels. Engineers can set voltage and current limits, enable or disable outputs, and monitor output status. Output limits should be configured to protect the device under test from overvoltage or overcurrent conditions.
Load behavior should be verified before connecting sensitive devices. Output capacitance and transient response affect how quickly the output settles after a change. Engineers should allow settling time in test sequences.
PXI Express Integration
The PXIe-4112 operates in compatible PXI Express chassis and communicates through the backplane. It can be combined with digitizers, switches, and DAQ modules. The PXI Express backplane supports high throughput and timing synchronization with other instruments.
System integration should consider chassis power, cooling, slot compatibility, and cabling. Power output wiring should be sized for the current and routed to reduce noise.
Software Control and Safety
The module is controlled through NI software and standard programming environments. Engineers can configure output values, create sequences, and monitor status. Software should include safe shutdown behavior, output limits, and fault handling.
For automated test, the power supply can be sequenced with measurement and switching. A typical sequence sets the output, waits for settling, acquires measurements, and then disables the output.
Applications
The PXIe-4112 is suited to device power in automated test, bias supply in component validation, and reference generation in laboratory systems. It supports controlled DC output in a modular PXI Express platform.
Installation and Maintenance
Installation requires a compatible PXI Express slot, proper output wiring, and verification of load compatibility. The chassis should provide adequate cooling and power. Maintenance includes checking connections, verifying output accuracy, and confirming calibration.
Summary
The National Instruments PXIe-4112 Programmable Power Supply provides controlled DC output for PXI Express systems. It supports device power, automated test, and validation applications with software control and integration in a modular chassis. The PXIe-4112 is a practical power module for engineers who need programmable supply capability in a PXI Express system.
