Model Explanation

PXI: PXI bus platform (modular instrument standard for testing and measurement)

2532: Product serial number, representing a 512 cross-point high-density matrix switch

Alias: PXI-2532, NI-2532, 778572-32 (part number)

Function Positioning: Reconfigurable matrix switch, supporting multiple topologies such as single-line and double-line, used for high-precision signal switching by NI

Technical Parameters

Cross-point Number: 512 (composed of 16 groups of 2×16 matrices) NI

Topology Configuration (Single Line): 4×128, 8×64, 16×32, dual 4×64, dual 8×32, dual 16×16, quad 4×32 NI

Topology Configuration (Double Line): 4×64, 8×32, 16×16, dual 4×32 NI

Relay Type: Reed (dry contact), rhodium contact NI

Maximum Switching Voltage: 300 Vrms (CAT II)

Maximum Switching Current: 0.5 A/channel, maximum switching power 10 W

Bandwidth: Single line ≥ 30 MHz, double line ≥ 25 MHz

Thermal Offset: < 1 μV (ultra-low thermoelectric potential)

Isolation Level: 150 V CAT II

Trigger Characteristics: PXI trigger line 0–7, minimum pulse width 150 ns; output trigger 1–62 μs, software selectable NI

Size: 3U PXI module (160 × 100 × 30 mm)

Weight: Approximately 0.8 kg

Status:停产； recommended replacement： PXIe-2532BNI

Interface and Communication Configuration

PXI Bus Interface： Standard 3U PXI backplane connector， providing power supply， trigger， clock and communication NI

Front-end I/O Connector： 2 × 160-pin Samtec BTE-EM series high-voltage connector NI

Terminal Block (optional)： SCB-2586， etc.， supports ribbon cable or screw terminal leads

Control Communication： PXI bus， compatible with NI- SWITCH， MAX configuration software NI

Trigger Synchronization： Hardware trigger input/output， supports synchronization with other instruments in the PXI system NI

Expansion Capability： Multiple modules can be cascaded through the terminal block to expand the matrix size NI Core function

High-density matrix switching: 512 cross points per slot, flexible configuration of multiple topologies, meeting the requirements of multi-channel signal routing for NI.

Ultra-low thermal offset: < 1 μV, suitable for low-level, high-precision measurements (such as thermocouple, sensor signals).

High-voltage isolation: 150 V CAT II isolation, allowing safe switching of mixed high-low voltage signals.

Hardware triggering and synchronization: nanosecond-level triggering, supporting high-speed scanning and multi-instrument synchronization, enhancing test throughput for NI.

Relay life monitoring: onboard relay counting, predicting maintenance cycles, reducing unexpected downtime for NI.

Reconfigurable topology: flexible switching of single-line / double-line matrices through software and terminal blocks, adapting to different testing requirements for NI. Applicable scenarios

Aerospace electronic automation testing: Multi-channel signal switching and fault injection.

Semiconductor wafer testing: High-density probe card signal routing.

Automotive ECU verification: Sensor and load signal simulation and switching.

Industrial sensor network monitoring: Multi-node round-trip collection and switching.

Precision instrument calibration: High-precision switching of low-level and weak signals.

User and Maintenance Instructions

Key Usage Points

Installation: Insert into the standard 3U PXI chassis slot, lock the panel after insertion, and ensure reliable contact of the backplane connector.

Configuration: Select the matrix topology through NI-SWITCH or MAX software, and define channel mapping and trigger parameters NI.

Cabling: Connect the 160-pin connector to the terminal block (such as SCB-2586), and then transfer it to the tested device; for high voltage / large current, connect according to specifications to avoid overload.

Operation Monitoring: Use the onboard relay counting function to regularly read the number of switching operations and evaluate the lifespan NI.

Environment: Operating temperature 0–50 °C. Avoid strong electromagnetic interference, dust, and condensation.

Maintenance Instructions

Regular Inspection: Check the connector tightness and whether the terminal block wiring is loose every quarter. Clean the surface dust.

Relay Lifespan Management: Typical lifespan of a bimetal relay: 10 V/100 mA approximately 10⁷ times; 20 V/500 mA approximately 5×10⁶ times; 100 V/10 mA approximately 5×10⁵ times. Replace the module in time when approaching the lifespan.

Troubleshooting: When the channel is not working or has poor contact, first check the wiring and terminal block, then diagnose the relay status through software; check the grounding and shielding when the thermal offset exceeds the limit.

Storage: When not in use for a long time, disconnect the power supply and store in a dry, dust-proof environment to avoid moisture and oxidation of the connector.