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National Instruments PXI-2527 PXI multiplexer switch module
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National Instruments · PXI

PXI-2527

The National Instruments PXI-2527 is a 300 V multiplexer switch module for automated test systems. It supports 64×1 one-wire, 32×1 two-wire, and 16×1 four-wire configurations.

ManufacturerNational Instruments
ModelPXI-2527
Part Number778572-27
Product TypePXI multiplexer switch module
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30-Day Returnspolicy applies
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Channel configurations64×1 one-wire; 32×1 two-wire; 16×1 four-wire
Maximum switching voltage300 V; CAT I channel-to-ground
Maximum total current2 A switching or carry, subject to power limits
Scan rate140 cycles/s
Relay monitoringOnboard relay counting
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Overview

Product overview

Key product information and technical features.

NI documents the TB-2627 front-mounting terminal block for signal connections. Its cold-junction compensation sensor supports thermocouple scanning applications; the sensor is in the terminal block, not the switch module.

  • Selectable one-, two-, and four-wire multiplexer configurations.
  • Electromechanical relays for signal routing.
  • Hardware-triggered operation for deterministic switching.
  • Onboard relay counting for relay-use monitoring.
Verified specifications

Technical data

Verified product specifications.

Multiplexer topologies1-wire 64×1; 1-wire dual 32×1; 2-wire 32×1; 2-wire dual 16×1; 4-wire 16×1; independent
Maximum switching voltage300 channel-to-channel; 300 channel-to-ground, CAT I V
Maximum total switching or carry current2 A
Maximum AC switching power per channel60 W, 62.5 VA, up to 60 Hz; DC loads require the manufacturer's voltage-current curve
Scan rate140 cycles/s
Relay typeElectromechanical, latching
I/O connector100-position HDI, right-angle, male
Bandwidth>30 one-wire; >25 two-wire; −3 dB with 50 Ω termination MHz
Condition & included items

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National Instruments

Manufacturer

PXI

Modular instrumentation platform

PXI-2527

Multiplexer switch for channel expansion

Signal connection

NI TB-2627 front-mounting terminal block

CAT I only: do not connect to mains circuits. Voltage, current, and switching-power limits apply together; consult the official specifications.
Manuals & software

Technical resources

Manuals, software and technical resources for this model.

NI PXI-2527 Product PageOfficial Product Page · ni.com
Open →
NI PXI/PXIe-2527 SpecificationsSpecifications PDF · download.ni.com
Open →
How to Connect Signals to the PXI/PXIe-2527Signal Connection Guide · ni.com
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PXI-2527 Dimensional Drawings and CAD ModelsTechnical resource
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Shipping, warranty & returns

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Warranty
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Returns
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FAQ

Product-specific questions

Product-specific answers based on available technical information.

Why is the PXI-2527 described as both 32-channel and 64-channel?

Channel count depends on wiring mode: 64 one-wire, 32 two-wire, or 16 four-wire channels.

Can it switch 300 V at 2 A simultaneously?

Not simply on the basis of those separate ratings. Switching must also meet the power limit and the DC load curve in NI's specifications.

Which terminal block does NI specify?

NI specifies the TB-2627, which provides screw-terminal connections and a cold-junction compensation sensor for thermocouple applications.

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