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NI (National Instruments) · PXI

PXI-2549

The NI PXI-2549, part number 778572-49, is a 2.7 GHz, 50 ohm dual-terminated SPDT PXI RF relay module. It provides two relay banks using electromechanical relays.

ManufacturerNI (National Instruments)
ModelPXI-2549
Part Number778572-49
Product Type2.7 GHz, 50 Ω, Dual-Terminated SPDT PXI RF Relay Module
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Number of Banks2
Scan Rate45 cycles/s
Bus ConnectionPXI Hybrid
Maximum Carry Current AC0.5 A
Maximum Switching Voltage AC30 V
Relay ConfigurationSPDT
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Overview

Product overview

Key product information and technical features.

The PXI-2549 is a single-pole double-throw RF switch module for the PXI platform. Its two banks and electromechanical relays provide switching with a specified bandwidth of 2.7 GHz and a characteristic impedance of 50 ohm.

Dual termination uses 50 ohm termination resistors to minimize reflections on open channels. Consult the model-specific NI specifications for the operating conditions associated with RF performance and electrical limits.

  • 2.7 GHz switch bandwidth with 50 ohm characteristic impedance.
  • Dual-terminated SPDT configuration with 50 ohm termination impedance.
  • Two relay banks, two channels and two electromechanical relays.
  • Specified scan rate of 45 cycles/s.
  • PXI platform module with a PXI Hybrid bus connection.
  • Maximum switching voltage of 30 V AC and 30 V DC.
Verified specifications

Technical data

Verified product specifications.

Number of Banks2
Scan Rate45 cycles/s
Bus ConnectionPXI Hybrid
Maximum Carry Current AC0.5 A
Maximum Switching Voltage AC30 V
Relay ConfigurationSPDT
Relay TypeElectromechanical
Switch Bandwidth2.7 GHz
Characteristic Impedence50 Ohm
TerminationYes
Supported Hardware PlatformPXI
Max Insertion Loss-1.35 dB
Maximum Switching Current DC0.5 A
Maximum Switching Voltage DC30 V
Mode (n-wire)1-wire
Number of Channels2
Number of Columns1
Number of Relays2
Number of Rows2
Row AccessYes
Termination Impedance50 Ohm
NI part numbers778572-49
Condition & included items

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NI

Manufacturer

PXI

Supported Hardware Platform

PXI-2549

This product

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Manuals & software

Technical resources

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Letter Of Volatility (NI)Letter Of Volatility · ni.com
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Specifications (NI)Specifications · ni.com
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Getting Started (NI)Getting Started · ni.com
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Dimensional Drawings (NI)Dimensional Drawings · ni.com
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Product Page (NI)Product Page · ni.com
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Shipping, warranty & returns

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FAQ

Product-specific questions

Product-specific answers based on available technical information.

What relay configuration does the PXI-2549 use?

It uses a dual-terminated SPDT configuration with two banks and electromechanical relays.

What are the bandwidth and impedance?

The specified switch bandwidth is 2.7 GHz. Both the characteristic impedance and termination impedance are 50 ohm.

What are the electrical switching limits?

The supplied verified specifications list maximum switching voltages of 30 V AC and 30 V DC, a maximum AC carry current of 0.5 A, and a maximum DC switching current of 0.5 A. Carry current and switching current are different ratings; consult NI specifications for operating conditions.

What is the NI part number for this module?

The supplied verified part number for the PXI-2549 is 778572-49.

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