National Instruments SWB-2817 Matrix relay card

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National Instruments · NI SwitchBlock

SWB-2817

The National Instruments SWB-2817 is a 16×22 reed-relay matrix card for NI SwitchBlock. It requires a PXI Carrier Module for SwitchBlock rather than installing directly as a stand-alone PXI module.

ManufacturerNational Instruments

ModelSWB-2817

Product TypeMatrix relay card

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Matrix16 rows × 22 columns

Relay technologyReed

Maximum switching current0.25 A

CarrierPXI-2800 required

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Overview

Product overview

Key product information and technical features.

The SWB-2817 belongs to NI's modular SwitchBlock matrix-switching platform. Each card occupies one relay-card position in a carrier, allowing matrix capacity to be assembled from individual cards.

The PXI-2800 carrier occupies four PXI slots, holds up to six SwitchBlock matrix modules, and provides an integrated analog bus for combining matrices. Cable selection and the card's A/B variant should be checked before planning external row connections.

1-wire matrix topology.
Uses one SwitchBlock relay-card position.
Supports carrier-based matrix expansion through the SwitchBlock analog bus.

Verified specifications

Technical data

Verified product specifications.

Topology	1-wire 16 × 22 matrix
Maximum switching voltage, row-to-column	100 VDC / 70 VAC
Maximum switching current per channel	0.25 A
Maximum carry current per channel	0.3 A
Maximum switching power per channel and per crosspoint	3 W
Relay type	Reed
I/O connector	96-position plastic SCSI

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National Instruments

Manufacturer

NI SwitchBlock / PXI-2800

Modular switching platform and required carrier

SWB-2817

16×22 matrix relay card

Software identification

SwitchBlock cards appear in NI MAX or NI-SWITCH as NI model-number A/B variants rather than SWB model names.

Requires a SwitchBlock carrier; confirm the A/B variant and connector pinout before wiring.

Manuals & software

Technical resources

Manuals, software and technical resources for this model.

NI 2817 SpecificationsSpecifications · download.ni.com

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SwitchBlock Modules: Switches Cable and Accessory CompatibilityCompatibility Guide · ni.com

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NI SwitchBlock Hardware ArchitectureTechnical resource

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FAQ

Product-specific questions

Product-specific answers based on available technical information.

Can the SWB-2817 be used directly in a PXI chassis?

No. It requires the PXI-2800 Carrier Module for SwitchBlock and is not a stand-alone PXI module.

Is 0.3 A the switching-current rating?

No. Maximum switching current is 0.25 A per channel; 0.3 A is the maximum carry current. The 3 W switching-power limit also applies.

Does every SWB-2817 have external row access?

The NI 2817A/B pinout differs: analog-bus pins are connected on the A variant and marked no-connect on the B variant. Confirm the installed variant before planning external row access.