National Instruments CFP-RLY-421 Relay output module

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National Instruments · Compact FieldPoint

CFP-RLY-421

Name: CFP-RLY-421
Brand: National Instruments

The CFP-RLY-421 provides eight normally open SPST relay outputs for Compact FieldPoint systems.

ManufacturerNational Instruments

ModelCFP-RLY-421

Product TypeRelay output module

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Technical Supportmodel & compatibility help

Channels8

ContactsSPST, nonlatching

Operating temperature−40 to 55 °C

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Overview

Product overview

Key product information and technical features.

Backplane-powered relays switch externally powered loads. Current limits depend on voltage, load type and temperature.

Hot-swappable module.
Open contacts at power-up.
Individual channel-state indicators.

Verified specifications

Technical data

Verified product specifications.

Resistive switching at 250 VAC or 40 VDC	1.5 A at −40 to 45 °C; 1.0 A at 45 to 55 °C
Resistive switching at 60 VDC	1.0 A
Resistive switching at 120 VDC	0.4 A
Minimum load	10 mA at 5 VDC
Channel-to-ground continuous isolation	250 Vrms
Channel-to-channel isolation	None

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Revision

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Compatibility

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National Instruments

Manufacturer

Compact FieldPoint

Platform

CFP-RLY-421

Relay output

Compatibility

Mounts on cFP-BP-x backplanes. Hazardous-voltage wiring requires cFP-CB-1 or a suitable cable.

Check hardware revision and load derating before installation.

Manuals & software

Technical resources

Manuals, software and technical resources for this model.

cFP-RLY-421 Operating Instructions, 373617A-01Operating Instructions And Specifications · download.ni.com

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NI Compact FieldPoint migration guideTechnical resource

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Alternatives & system components

FAQ

Product-specific questions

Product-specific answers based on available technical information.

Which revisions does this manual cover?

185151C-01 and later. Earlier revisions require document 323617B-01.

How should inductive loads be protected?

NI recommends external flyback diodes for DC loads or MOVs for AC loads.