This document lists specifications for the PXI-2571. All specifications are subject to change without notice.
Warranted specifications describe the performance of a model under stated operating conditions and are covered by the model warranty.
Characteristics describe values that are relevant to the use of the model under stated operating conditions but are not covered by the model warranty.
Specifications are valid at 23 °C unless otherwise noted.
All voltages are specified in DC, ACpk, or a combination unless otherwise specified.
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This module is rated for Measurement Category I and intended to carry signal voltages no greater than 100 V. This module can withstand up to 500 V impulse voltage. Do not use this module for connection to signals or for measurements within Categories II, III, or IV. Do not connect to MAINs supply circuits (for example, wall outlets) of 115 or 230 VAC.[1]
Maximum switching power (per channel) |
60 W, 62.5 VA (DC to 60 Hz) |
Maximum current (switching or carry, per channel) |
1 A |
Simultaneous channels at maximum current (≤55 °C) |
66 |
Minimum switch load |
20 mV/1 mA |
Switching inductive loads (for example, motors and solenoids) can produce high voltage transients in excess of the module’s rated voltage. Without additional protection, these transients can interfere with module operation and impact relay life. For more information about transient suppression, visit ni.com/info and enter the Info Code relayflyback.
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DC path resistance typically remains low for the life of the relay. At the end of relay life, the path resistance rises rapidly above 1 Ω. Load ratings apply to relays used within the specification before the end of relay life.
Thermal EMF |
12 μV, typical |
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Bandwidth (-3 dB, 50 Ω termination) |
≥35 MHz, typical |
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Relay operate time |
1 ms, typical 3.4 ms maximum |
Certain applications may require additional time for proper settling. Refer to the NI Switches Help at ni.com/manuals for more information about including additional settling time.
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Relays are field replaceable. Refer to the NI Switches Help at ni.com/manuals for more information about replacing a failed relay.
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The PXI-2571 can recognize trigger pulse widths less than 150 ns if you disable digital filtering. Refer to the NI Switches Help at ni.com/manuals for information about disabling digital filtering.
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Relay type |
Electromechanical, latching |
Relay contact material |
Palladium-ruthenium, gold covered |
I/O connector |
200 POS LFH Matrix 50, receptacle |
PXI power requirement |
6 W at 5 V 2.5 W at 3.3 V |
Dimensions (L × W × H) |
3U, one slot, PXI/cPCI module, 21.6 cm × 2.0 cm × 13.0 cm (8.5 in. × 0.8 in. × 5.1 in.) |
Weight |
174 g (6.1 oz) |
Maximum altitude |
2,000 m (at 25 °C ambient temperature) |
Pollution Degree |
2 |
This product is designed to meet the requirements of the following electrical equipment safety standards for measurement, control, and laboratory use:
For UL and other safety certifications, refer to the product label or the Online Product Certification section.
For EMC declarations, certifications, and additional information, refer to the Online Product Certification section.
This product meets the essential requirements of applicable European Directives, as follows:
Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for this product, visit ni.com/certification, search by model number or product line, and click the appropriate link in the Certification column.
NI is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers.
For additional environmental information, refer to the Minimize Our Environmental Impact web page at ni.com/environment. This page contains the environmental regulations and directives with which NI complies, as well as other environmental information not included in this document.
At the end of the product life cycle, all NI products must be disposed of according to local laws and regulations. For more information about how to recycle NI products in your region, visit ni.com/environment/weee.