Modular Systems > National Instruments > SwitchBlock Series

National Instruments - SwitchBlock Series - 781421-34National Instruments - SwitchBlock Series - 781421-34 - Wiring781421-34 New781421-34 | Legacy, Refurbished and New Surplus
National Instruments - SwitchBlock Series - 781421-34
National Instruments - SwitchBlock Series - 781421-34 - Wiring
781421-34 New
781421-34 | Legacy, Refurbished and New Surplus
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781421-34, 8 X 34 Matrix, 2-Wire, SWB-2834 Electromechanical Matrix for NI Switchblock
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National Instruments 781421-34 Electromechanical Relay Matrix Module

The National Instruments 781421-34 (NI-2834B) is an electromechanical relay matrix module designed for SwitchBlock systems. This module is tailored for high power applications that makes it suitable for routing signals in complex testing environments. It is capable of operating as a standalone relay card or can be expanded in a single SwitchBlock carrier or PXI chassis. The primary function of the module is to allow dynamic signal routing and reduce the need for manual rewiring. This simplifies signal path switching between various instruments like oscilloscopes, digital multimeters (DMMs), waveform generators, and power supplies.

This 781421-34 module features a maximum switching voltage of 100 V (CAT I) between rows and columns or row to ground. It can support a maximum switching current of 2.0 A per channel and a maximum switching power of 60 W. The system can run up to 8 channels simultaneously at the maximum current. The relay matrix ensures low thermal electromotive force (EMF) of less than 10 μV, which is critical for maintaining signal integrity. This electromechanical relay matrix module offers excellent isolation and crosstalk performance which are essential for maintaining signal quality in high-density test setups. It has a typical bandwidth of ≥10 MHz with minimal signal loss while isolation in an open channel at 1 MHz is approximately 45 dB. Crosstalk is also well-managed with values as low as -75 dB at 10 kHz.

This NI 781421-34 module features electromechanical latching relays made from palladium-ruthenium with a gold covering that is designed for a high number of switching cycles. The mechanical relay life can reach up to 100 million cycles with no load while the electrical life varies depending on the voltage and current with a maximum of 2.5 million cycles at lower power levels. 

The relay matrix module is compact with dimensions of 11.2 cm × 1.2 cm × 17.1 cm and weighs just 373 g. It operates efficiently with power requirements of 20 W at 5 V and 5 W at 3.3 V. The module is designed for indoor use in ambient temperatures ranging from 0°C to 55°C and can be stored in temperatures between -20°C and 71°C. 

Part Number781421-34
Model NameNI-2834B
Part TypeElectromechanical Relay Matrix Module
Maximum Switching Current DC2 Amp
Number of Columns71
Relay TypeElectromechanical
Maximum Switching Voltage DC100 V
Dimensions11.2 cm × 1.2 cm × 17.1 cm (4.4 in. × 0.5 in. × 6.7 in.)
Weight373 g (13.2 oz)
Warranty2 - 3 years


Why Buy From Apex Waves:

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Overnight, Next Day Air or Expedited shipping options available
International delivery available
Same day shipping for in-stock on location
Warranty: All of our products are covered by our Apex Waves Warranty.
3 Year Warranty - New Surplus Parts
2 Year Warranty - Refurbished Parts
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Quick Quotes: Receive Price & Availability Today!
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Repair: Cost & Lead Time Available Upon Request for Service
Repair Evaluation: $150
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Common Typos: 78W421-34, 781E21-34, 7814W1-34, 78142W-34, 781421-3R

781421-34



Modular Systems > National Instruments > SwitchBlock Series

781421-34, 8 X 34 Matrix, 2-Wire, SWB-2834 Electromechanical Matrix for NI Switchblock
4.7/5 | 10 ratings

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1-800-915-6216

National Instruments 781421-34 Electromechanical Relay Matrix Module

The National Instruments 781421-34 (NI-2834B) is an electromechanical relay matrix module designed for SwitchBlock systems. This module is tailored for high power applications that makes it suitable for routing signals in complex testing environments. It is capable of operating as a standalone relay card or can be expanded in a single SwitchBlock carrier or PXI chassis. The primary function of the module is to allow dynamic signal routing and reduce the need for manual rewiring. This simplifies signal path switching between various instruments like oscilloscopes, digital multimeters (DMMs), waveform generators, and power supplies.

This 781421-34 module features a maximum switching voltage of 100 V (CAT I) between rows and columns or row to ground. It can support a maximum switching current of 2.0 A per channel and a maximum switching power of 60 W. The system can run up to 8 channels simultaneously at the maximum current. The relay matrix ensures low thermal electromotive force (EMF) of less than 10 μV, which is critical for maintaining signal integrity. This electromechanical relay matrix module offers excellent isolation and crosstalk performance which are essential for maintaining signal quality in high-density test setups. It has a typical bandwidth of ≥10 MHz with minimal signal loss while isolation in an open channel at 1 MHz is approximately 45 dB. Crosstalk is also well-managed with values as low as -75 dB at 10 kHz.

This NI 781421-34 module features electromechanical latching relays made from palladium-ruthenium with a gold covering that is designed for a high number of switching cycles. The mechanical relay life can reach up to 100 million cycles with no load while the electrical life varies depending on the voltage and current with a maximum of 2.5 million cycles at lower power levels. 

The relay matrix module is compact with dimensions of 11.2 cm × 1.2 cm × 17.1 cm and weighs just 373 g. It operates efficiently with power requirements of 20 W at 5 V and 5 W at 3.3 V. The module is designed for indoor use in ambient temperatures ranging from 0°C to 55°C and can be stored in temperatures between -20°C and 71°C. 

Part Number781421-34
Model NameNI-2834B
Part TypeElectromechanical Relay Matrix Module
Maximum Switching Current DC2 Amp
Number of Columns71
Relay TypeElectromechanical
Maximum Switching Voltage DC100 V
Dimensions11.2 cm × 1.2 cm × 17.1 cm (4.4 in. × 0.5 in. × 6.7 in.)
Weight373 g (13.2 oz)
Warranty2 - 3 years

Why Buy From Apex Waves

Apex Waves Youtube Video

"The business transaction was super easy and friendly."


"Hand carrying parts to fedex directly to make sure I get them overnight. Great service"


"They were very helpful to get me the test equipment that I need."


Delivery: UPS, FedEX and DHL – Free FedEx Ground on all orders
Overnight, Next Day Air or Expedited shipping options available
International delivery available
Same day shipping for in-stock on location
Warranty: All of our products are covered by our Apex Waves Warranty.
3 Year Warranty - New Surplus Parts
2 Year Warranty - Refurbished Parts
Returns: No hassle return policy.
Dedicated customer service team.
Payment: Authorize.Net paypal visa card master card american express card BB&T Bank better business bureau
Quick Quotes: Receive Price & Availability Today!
Calibration: Ask About Our Tiered Calibration Levels
Option & Modules: Confirm Your Requirements or Versions
Repair: Cost & Lead Time Available Upon Request for Service
Repair Evaluation: $150
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