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National Instruments · PXI

PXI-2570

The National Instruments PXI-2570 is a PXI relay module with 40 armature latching SPDT relays. It provides COM, normally closed, and normally open signal connections and supports channel control through NI-SWITCH.

ManufacturerNational Instruments

ModelPXI-2570

Product Type40-channel SPDT relay module

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Relay count40

Topology40-SPDT

Relay technologyElectromechanical armature, latching

Signal connector200-pin LFH

Control driverNI-SWITCH

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Overview

Product overview

Key product information and technical features.

The PXI-2570 belongs to NI's general-purpose PXI relay module family. Its 40-SPDT topology provides individual changeover relay paths rather than a predefined matrix or multiplexer arrangement.

NI documents channel connections through the niSwitch Connect Channels VI and niSwitch_Connect function. The official overview includes the pinout, hardware diagram, channel-to-relay mapping, and relay replacement procedures.

40 latching SPDT electromechanical relays.
COM, NC, and NO signal connections for each relay channel.
NI-SWITCH channel connection functions and VIs.
LFH200 signal connectivity with manufacturer-listed cable and terminal block options.

Verified specifications

Technical data

Verified product specifications.

Relay count	40 relays
Relay topology	40-SPDT
Relay type	Armature latching electromechanical
Signal connector	LFH, 200-pin
NI-SWITCH topology identifier	2570/40-SPDT (NISWITCH_TOPOLOGY_2570_40_SPDT)

Condition & included items

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Compatibility

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National Instruments

Manufacturer

PXI

Modular hardware platform

PXI-2570

40-SPDT relay switching module

Software control

NI-SWITCH supports the PXI-2570; select a driver release appropriate to the host software and operating system.

Confirm electrical ratings before connecting loads. NI warns that inductive-load transients can exceed the module's rated voltage.

Manuals & software

Technical resources

Manuals, software and technical resources for this model.

PXI-2570 Overview, Pinout, Topology, and Relay ReplacementManufacturer Technical Documentation · ni.com

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General Purpose Relay and Relay Driver Cable and Accessory CompatibilityCompatibility Guide · ni.com

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NI-SWITCH 2022 Q4 ReadmeDriver Support Documentation · ni.com

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PXI-2570/71 Letter of VolatilityTechnical resource

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FAQ

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Product-specific answers based on available technical information.

What relay topology does the PXI-2570 provide?

It contains 40 armature latching SPDT relays. NI-SWITCH identifies the topology as 2570/40-SPDT.

What signal connector does the PXI-2570 use?

The module uses a 200-pin LFH connector. NI's compatibility guide lists LFH200-to-four-50-pin-D-Sub cable options and the TBX-50B remote terminal block.

Which driver supports the PXI-2570?

NI-SWITCH supports the PXI-2570. Check the selected driver release's operating-system and development-environment requirements before installation.