1 image: Click to enlarge

NI (National Instruments) · PXI

PXI-2521

The NI PXI-2521 is a 40-channel PXI relay module with DPST electromechanical relays. It provides maximum switching ratings of 150 V DC and 150 V AC, with a maximum DC switching current of 2 A.

ManufacturerNI (National Instruments)

ModelPXI-2521

Part Number778572-21

Product Type40-Channel, 2 A, DPST PXI Relay Module

● Available to Order

Condition: confirmed per unit

Request current pricing and lead time for this model. Our team will confirm the exact equipment configuration and condition.

Fast RFQ

Quote: PXI-2521

Free Shippingfull policy linked

30-Day Warrantystandard coverage

30-Day Returnspolicy applies

Technical Supportmodel & compatibility help

Scan Rate145 cycles/s

Bus ConnectionPXI Hybrid

Maximum Switching Current DC2 A

Maximum Switching Voltage DC150 V

Relay ConfigurationDPST

Switch Bandwidth25 MHz

SOHO Assistant

Ask about this exact model, a replacement, accessory, driver, rental or repair question.

Ask about specifications, compatibility, availability, rental or repair.

Ask SOHO Assistant

Overview

Product overview

Key product information and technical features.

The PXI-2521 provides 40 channels using independent double-pole single-throw armature relays. Its nonlatching relays feature low on-resistance and low thermal offsets.

The module fits the NI PXI switching platform and has a PXI Hybrid bus connection. It is software programmable and supports onboard relay count tracking, with a listed switch bandwidth of 25 MHz and scan rate of 145 cycles/s.

40 channels and 40 electromechanical relays.
Independent DPST armature relays with nonlatching operation.
Maximum switching voltage of 150 V DC and 150 V AC.
Maximum DC switching current of 2 A and maximum AC carry current of 2 A.
Software-programmable operation with onboard relay count tracking.
25 MHz switch bandwidth and 145 cycles/s scan rate.

Verified specifications

Technical data

Verified product specifications.

Scan Rate	145 cycles/s
Bus Connection	PXI Hybrid
Maximum Switching Current DC	2 A
Maximum Switching Voltage DC	150 V
Relay Configuration	DPST
Switch Bandwidth	25 MHz
Number of Relays	40
Supported Hardware Platform	PXI
Maximum Carry Current AC	2 A
Maximum Switching Voltage AC	150 V
Number of Channels	40
Relay Type	Electromechanical
Row Access	Yes
NI part numbers	778572-21

Condition & included items

What the actual unit includes

Confirm condition, included accessories and revision before ordering.

Condition

Confirmed per unit.

Included

Device / accessories confirmed in quote.

Revision

Exact revision confirmed when relevant.

Compatibility

Complete the measurement chain

Review system components and compatibility requirements.

NI

Manufacturer

PXI

Supported Hardware Platform

PXI-2521

This product

Platform shown as listed by NI. Confirm controller, chassis and software fit for your system with NI before integration.

Manuals & software

Technical resources

Manuals, software and technical resources for this model.

Letter Of Volatility (NI)Letter Of Volatility · ni.com

Open →

Specifications (NI)Specifications · ni.com

Open →

Getting Started (NI)Getting Started · ni.com

Open →

Dimensional Drawings (NI)Dimensional Drawings · ni.com

Open →

Product Page (NI)Product Page · ni.com

Open →

Shipping, warranty & returns

Commercial terms

Review shipping, warranty and return terms before ordering.

Shipping

Free Shipping. Full policy terms apply.

Warranty

30-Day Warranty. Standard coverage applies.

Returns

30-Day Returns. Return policy applies.

Price / Availability

Contact SOHO ProLab for current quote and availability.

Lifecycle services

Source, rent or repair the exact model

Choose pricing, rental or repair for this exact model.

Get Price

Current price, availability and exact unit details.

Rent This Model

Request the exact model or a suitable alternative.

Repair This Model

Send the model and failure symptoms for review.

Explore equipment

Electronic Test and Instrumentation

Shipping, warranty and returns

FAQ

Product-specific questions

Product-specific answers based on available technical information.

What relay configuration does the PXI-2521 use?

It uses independent double-pole single-throw (DPST) electromechanical armature relays with nonlatching operation.

How many channels and relays does the PXI-2521 have?

The module has 40 channels and 40 relays.

What are the listed voltage and current limits?

Maximum switching voltage is 150 V DC and 150 V AC. Maximum DC switching current is 2 A, and maximum AC carry current is 2 A. Carry current and switching current are distinct ratings; consult the NI specifications for operating constraints.

Does the PXI-2521 support relay count tracking?

Yes. The module is software programmable and supports onboard relay count tracking.