II. Model Interpretation

PXI: Standard 3U PXI bus, single slot, compatible with PXI/PXIe mixed chassis NI.

4110: NI PXI power supply series code, representing three channels, ±20 V/6 V, 1 A, with isolation and precise measurement NI.

779647-10: Standard version, without auxiliary power supply, internal power supply power limited (total ≤ 3 W).

779647-11: High-end version, includes APS-4100 external auxiliary power supply, full power output (each channel 20 W) NI.

Positioning: General-purpose precision power supply for PXI system, providing positive and negative power + digital circuit power supply, with built-in DMM level readback, no need for additional measurement card.

III. Technical Parameters (23 ℃ ± 5 ℃, 1 year accuracy, preheating 15 minutes)

(1) Channel Configuration (Single quadrant: only source current, no absorption)                (2) Programmable Precision and Resolution (16 bits) NI

Voltage Programmable Control

CH0: Resolution 0.1 mV; Accuracy 0.02% + 1 mV

CH1/CH2: Resolution 0.4 mV; Accuracy 0.05% + 10 mV

Current Programmable Control

All channels: Resolution 0.02 mA; Accuracy 0.15% + 4 mA

Readback Measurement Accuracy (Built-in DMM)

Voltage: 0.01% + 0.5 mV

Current: 0.1% + 2 mA

(3) Dynamic Characteristics

Ripple Noise: ≤ 5 mVpp (20 MHz bandwidth)

Rise Time: ≤ 500 μs (10%~90%)

Load Regulation Rate: ≤ 0.01% (full load change)

Linear Regulation Rate: ≤ 0.005% (input voltage change)

(4) Electrical / Mechanical / Environmental

Power Supply: PXI backplane (3.3 V/5 V/12 V) + optional APS-4100 24 V/3 A auxiliary power supply NI

Power Consumption: Internal power supply approximately 12 W; External auxiliary power supply approximately 46 W (full load)

Connector: 6-pin Euro-style terminal (CH0/CH1/CH2 + GND / Isolated GND)

Size / Weight: 3U single slot (216 mm × 20 mm × 130 mm); approximately 350 g

Safety: IEC 61010-1, CAT I 60 V

Temperature: Working 0 ℃~55 ℃; Accuracy guaranteed 15 ℃~35 ℃

Calibration Cycle: 1 year (NIST traceable)

IV. Interface and Communication Configuration

(1) Front-end I/O (6-pin connector) NI

CH0 (+6 V): Non-isolated positive output

GND: CH0 ground (PXI system ground)

CH1 (+20 V): Isolated positive output

Isolated GND: CH1/CH2 isolated ground

CH2 (–20 V): Isolated negative output

Shield: Optional connection to chassis ground

(2) Bus and Software

Bus: Standard PXI, compatible with PXIe mixed slot, supports PXI Trigger synchronization NI

Driver: NI‑DCPower (IVI), supports LabVIEW/TestStand/Python/C#

Configuration: NI MAX (Identification, Self-Check, Parameter Configuration, Calibration)

Synchronization: PXI Trigger bus, PFI, multi-module synchronization delay ≤ 1 μs

V. Core Functions Three-channel positive and negative power supply integration: +6 V digital power supply, ±20 V analog/operational amplifier power supply. One slot replaces 3 independent power supplies.

Two high-voltage isolated outputs: CH1/CH2 20 Vrms isolation to avoid ground loops, suitable for floating ground loads.

High-precision programmable control and readback: 16-bit resolution, voltage readback up to 0.01%, no need for additional multimeter NI.

CV/CC automatic switching: Automatic switching between constant voltage (CV) and constant current (CC) modes to protect the load and power supply.

Channel parallel/series expansion: Parallel to increase current (maximum 2 A), series to increase voltage (maximum ±40 V) NI.

Low ripple linear output: Switching pre-regulation + linear post-stage, ripple ≤ 5 mVpp, suitable for precision analog circuits NI.

Overvoltage / overcurrent / overheat protection: Dual protection by hardware + software, automatic shutdown upon fault and reporting.

System integrated management: Synchronized with PXI chassis clock and trigger, supports LabVIEW automated programming NI.

Six. Application Scenarios

Electronic circuit research and verification: ±20 V analog power supply + 6 V digital power supply for operational amplifiers, ADC/DAC, sensor circuits NI.

Semiconductor / component testing: Bias power supply for MOSFET, IGBT, diode static parameter testing NI.

Industrial automation ATE: Multi-channel power supply solution for automotive electronics, consumer electronics, household appliances batch testing NI.

Precise sensor calibration: Excitation power supply and precise measurement for RTD, thermocouple, pressure sensor NI.

Aerospace / military electronic testing: Positive and negative power supply for high-reliability equipment and parameter monitoring NI.

General laboratory power supply: Replace bench power supply, compatible with PXI system integration, saves space and cost NI.

Seven. Usage and Maintenance Instructions

(1) Installation and Power On

Disconnect power, insert PXI single slot, tighten panel screws; high-end version connects to APS-4100 auxiliary power supply NI.

Power on for 15 minutes for preheating to ensure accuracy; NI MAX confirms the equipment is normal and self-checks without errors.

(2) Wiring and Operation

Isolated channels wiring: CH1/CH2 must be connected to isolated GND to avoid mixed connection with system ground causing ground loops.

Current limit setting: Set a reasonable upper limit for current based on the load to prevent overcurrent damage to the load.

Channel expansion: Ensure voltage consistency when parallel; ensure matching isolation level when series NI.

High-voltage operation: Pay attention to insulation when ±20 V output is provided to avoid short circuits.

(3) Maintenance and Calibration

Regular calibration: Once per year external traceability calibration; daily internal self-calibration to compensate for temperature drift.

Cleaning and maintenance: Regularly clean dust from connection terminals, keep dry; disconnect power and prevent dust when idle for a long time.

Environmental control: Working environment 0 ℃~55 ℃, no condensation, away from strong vibration / strong electromagnetic interference.

Usage Prohibitions: Do not use beyond overvoltage / overcurrent limits; avoid frequent short circuit impacts; isolated channels must not be operated with grounding.

Eight. Comparison with Similar PXI Power Supplies

PXI-4110: Three-channel (+6 V/±20 V), 1 A, isolated, with readback, single quadrant, general type, suitable for mixed circuit power supply NI.

PXI-4130: Four-channel, ±30 V, 2 A, dual quadrant (current absorption possible), suitable for battery testing, active load NI.

PXI-4150: Single channel, ±60 V, 5 A, high power, suitable for high-power device testing NI