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PXIE-2527

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PXIE-2527
May 27, 2026

PXIE-2527

The PXIe‑2527 (NI part number: 780587‑27) is a high‑voltage, high‑density PXI Express multiplexer switch module designed for medium‑to‑high channel count automated test systemsNI. It uses electromechanical relays capable of switching up to 300 VDC/300 VAC and 2 A, making it ideal for expanding PXI DMMs and other measurement instrumentsNI. The module supports flexible topologies: 64×1 1‑wire, 32×1 2‑wire, or 16×1 4‑wire, and includes onboard relay counting and hardware triggering for deterministic, high‑throughput operationNI.

Description

Model Nomenclature

  • PXIe: PXI Express high‑speed modular instrument bus.

  • 25: Series for switch/multiplexer modules.

  • 27: High‑voltage multiplexer variant with 300 V rating, 32‑channel 2‑wire base configuration, and multi‑topology support.

Technical Specifications

  • Form factor: 3U, one‑slot PXIe.

  • Channel configurations: 64×1 (1‑wire), 32×1 (2‑wire), 16×1 (4‑wire)NI.

  • Relay type: Electromechanical, high‑power.

  • Max switching voltage: 300 VDC / 300 VAC (CAT I)NI.

  • Max switching current: 2 A DC / ACNI.

  • Minimum switch load: 20 mV, 1 mA.

  • Bandwidth: 30 MHz.

  • Scan rate: 140 cycles per secondNI.

  • On‑resistance: Typical <1 Ω per channel.

  • Relay life: >10⁶ operations at full rating.

  • Operating temperature: 0 °C to 50 °C; storage: −40 °C to 70 °C.

  • Power: 12 W (+12 V) via PXIe bus.

Interface and Communication Configuration

  • Front panel: Two high‑voltage D‑sub connectors for channel I/O and common terminals.

  • Bus: PXIe Gen1, PXI trigger lines 0–7 for multi‑module synchronization.

  • Trigger: Hardware trigger input for deterministic channel switching; minimum pulse width 150 ns.

  • Software: Plug‑and‑play for Windows; configured in NI‑MAX; programmable via LabVIEW, LabWindows/CVI, C++ APIs; supported by NI‑SWITCH driverNI.

Core Features

  • Flexible topology: Software‑selectable 1‑wire, 2‑wire, or 4‑wire multiplexing for voltage, current, and resistance measurementsNI.

  • High‑voltage capability: 300 V rating enables testing of industrial, aerospace, and automotive high‑voltage componentsNI.

  • Relay monitoring: Onboard relay counter tracks switching cycles for predictive maintenanceNI.

  • Deterministic triggering: Hardware triggers ensure precise, repeatable switching sequencesNI.

  • Transient suppression: Integrated protection extends relay life under inductive loads.

  • PXIe integration: Seamlessly synchronizes with PXI DMMs, SMUs, and other instruments for scalable test systemsNI.

Application Scenarios

  • Industrial automation and power electronics component testing.

  • Aerospace and defense high‑voltage subsystem validation.

  • Automotive battery, ECU, and high‑voltage distribution testing.

  • Semiconductor and passive device parametric test (high‑voltage).

  • Medium‑to‑high channel count data acquisition and signal routing.

Usage and Maintenance Instructions

Installation and Configuration
Insert the module into a 3U one‑slot PXIe chassis and secure the latch. Connect DUT and instrument cables to the front‑panel D‑sub connectors, verifying channel and common terminal mapping. Power on the chassis; the system detects the module automatically. Use NI‑MAX to select topology (1/2/4‑wire), configure triggers, and enable relay counting. Develop test sequences in LabVIEW or other supported environments to define scanning patterns and measurement synchronization. Verify all connections and insulation integrity before applying high voltage.
Daily Maintenance
Keep the module and chassis clean, dry, and adequately ventilated within rated temperature ranges. Avoid excessive force when mating D‑sub cables to prevent connector damage. Inspect cables and connectors periodically for wear, dirt, or loose contacts. Monitor relay count via software and replace the module if cycles approach rated life. Ensure chassis cooling is sufficient during continuous high‑voltage operation. Store in a dry, antistatic environment when not in use.
Safety Notice
Do not apply voltages exceeding 300 VDC/300 VAC. Follow ESD procedures when handling the module. Disconnect all power before installation, removal, or servicing. Use shielded cables rated for high voltage. Do not operate with damaged connectors or exposed wiring. Dispose of according to local electronic waste regulations at end‑of‑life.


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