PXI-2575 Specifications

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Updated2025-05-22
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PXI-2575 Specifications

Caution The protection provided by the PXI-2575 can be impaired if it is used in a manner not described in this document.

Definitions

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.

Typical specifications describe the performance met by a majority of models.
Nominal specifications describe an attribute that is based on design, conformance testing, or supplemental testing.

Specifications are Typical unless otherwise noted.

Conditions

Specifications are valid at 23 °C unless otherwise noted.

All voltages are specified in DC, AC_pk, or a combination unless otherwise specified.

PXI-2575 Pinout

1-Wire 196x1 Multiplexer Topology

Table 1. Signal Descriptions
Signal	Description
CHx	Signal connection
COM	Routing destination for all channels
—	No connection

2-Wire 95×1 Multiplexer Topology

Table 2. Signal Descriptions
Signal	Description
CHx+	Positive signal connection
CHx-	Negative signal connection
COM+	Routing destination for all positive channels
COM-	Routing destination for all negative channels
—	No connection

2-Wire 98×1 Multiplexer Topology

Table 3. Signal Descriptions
Signal	Description
CHx+	Positive signal connection
CHx-	Negative signal connection
COM+	Routing destination for all positive channels
COM-	Routing destination for all negative channels
—	No connection

Topology

Topologies

1-wire 196 × 1 multiplexer

2-wire 95 × 1 multiplexer

2-wire 98 × 1 multiplexer

Input Characteristics

Caution 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. Refer to the Read Me First: Safety and Electromagnetic Compatibility document for more information on measurement categories.

Caution When hazardous voltages (>42.4 V_pk/ 60 VDC) are present on any relay terminal, safety low-voltage (≤42.4 V_pk/60 VDC) cannot be connected to any other relay terminal.

Maximum switching voltage
Channel-to-channel	100 V
Channel-to-ground	100 V, CAT I

Caution The switching power is limited by the maximum switching current and the maximum voltage and must not exceed 60 W, 62.5 VA.

Maximum switching power (per channel)

60 W, 62.5 VA (DC to 60 Hz)

DC isolation resistance (between channel and COM terminals)

>1 GΩ, typical at 25 °C

Maximum total current (switching or carry)

1 A

Minimum switch load^[1]¹ The PXI-2575 is not recommended for 2-wire resistance measurements.^[2]² 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.

20 mV /1 mA

DC path resistance^[3]³ 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.
Initial	<0.5 Ω, warranted
End-of-life	≥1.0 Ω

Differential thermal EMF

3 μV, typical^[4]⁴ To ensure the typical thermal EMF, power down all relays and avoid pulsing high currents near the channels you are measuring. For more information about powering down latching relays, refer to the Power Down Latching Relays After Debounce property in NI-SWITCH or the Power Down Latching Relays After Settling property in NI-DAQmx.

<12 μV, maximum

Bandwidth (-3 dB, 50 Ω termination)
1-wire	>20 MHz
2-wire	>8 MHz

Channel-to-channel isolation (50 Ω termination)^[5]⁵ Each relay in the PXI-2575 is shared by two channels.

1-wire channels in different relays
10 kHz	>90 dB
100 kHz	>70 dB
1 MHz	>50 dB

1-wire channels in the same relay
10 kHz	>68 dB
100 kHz	>48 dB
1 MHz	>28 dB

2-wire channels
10 kHz	>95 dB
100 kHz	>75 dB
1 MHz	>55 dB

Open channel isolation (50 Ω termination)
10 kHz	>90 dB
100 kHz	>70 dB
1 MHz	>50 dB

Dynamic Characteristics

Relay operate time^[6]⁶ Certain applications may require additional time for proper settling. Refer to NI Switches Help for more information about including additional settling time.

1 ms, typical

3.4 ms, maximum

Expected relay life^[7]⁷ Relays are field replaceable. Refer to NI Switches Help for more information about replacing a failed relay.

Mechanical

1 × 10⁸ cycles

Electrical
10 VDC, 100 mADC resistive	2.5 × 10⁶ cycles
10 VDC, 1 ADC resistive	1 × 10⁶ cycles
30 VDC, 1 ADC resistive	5 × 10⁵ cycles
60 VDC, 1 ADC resistive	1 × 10⁵ cycles

Trigger Characteristics

Input trigger
Sources	PXI trigger lines <0…7>
Minimum pulse width^[8]⁸ The PXI-2575 recognizes trigger pulse widths less than 150 ns if digital filtering is disabled. For information about disabling digital filtering, refer to the NI Switches Help.	150 ns

Output trigger
Destinations	PXI trigger lines <0...7>
Default pulse width	2 μs, typical

Physical Characteristics

Relay type

Electromechanical, latching

Relay contact material^[9]⁹ Some versions of the PXI-2575 are built with silver, gold covered. Contact NI for more details on specific versions.

Palladium-ruthenium, gold covered

I/O connector

200 POS LFH Matrix 50, receptacle

Power requirement

PXI

6 W at 5 V

2.5 W at 3.3 V

PXI Express

7.5 W at 12 V

2.5 W at 3.3 V

Dimensions (L × W × H)

3U, one slot, PXI/cPCI module

21.6 × 2.0 × 13.0 cm (8.5 × 0.8 × 5.1 in.)

Weight

231 g (8.1 oz)

Environment


Maximum altitude	2,000 m (at 25 °C ambient temperature)
Pollution degree	2
Indoor use only

Operating Environment

Ambient temperature range	0 °C to 55 °C (Tested in accordance with IEC 60068-2-1 and IEC 60068-2-2.)
Relative humidity range	10% to 90%, noncondensing (Tested in accordance with IEC 60068-2-56.)

Storage Environment

Ambient temperature range	-40 °C to 71 °C (Tested in accordance with IEC 60068-2-1 and IEC 60068-2-2.)
Relative humidity range	5% to 95%, noncondensing (Tested in accordance with IEC 60068-2-56.)

Shock and Vibration

Operational shock

30 g peak, half-sine, 11 ms pulse (Tested in accordance with IEC 60068-2-27. Test profile developed in accordance with MIL-PRF-28800F.)

Random vibration
Operating	5 Hz to 500 Hz, 0.31 g_rms (Tested in accordance with IEC 60068-2-64.)
Nonoperating	5 Hz to 500 Hz, 2.46 g_rms (Tested in accordance with IEC 60068-2-64. Test profile exceeds the requirements of MIL-PRF-28800F, Class 3.)

Compliance and Certifications

Safety Compliance Standards

This product is designed to meet the requirements of the following electrical equipment safety standards for measurement, control, and laboratory use:

IEC 61010-1, EN 61010-1
UL 61010-1, CSA C22.2 No. 61010-1

Note For safety certifications, refer to the product label or the Product Certifications and Declarations section.

Electromagnetic Compatibility

This product meets the requirements of the following EMC standards for electrical equipment for measurement, control, and laboratory use:

EN 61326-1 (IEC 61326-1): Class A emissions; Basic immunity
EN 55011 (CISPR 11): Group 1, Class A emissions
EN 55022 (CISPR 22): Class A emissions
EN 55024 (CISPR 24): Immunity
AS/NZS CISPR 11: Group 1, Class A emissions
AS/NZS CISPR 22: Class A emissions
FCC 47 CFR Part 15B: Class A emissions
ICES-001: Class A emissions

Note In the United States (per FCC 47 CFR), Class A equipment is intended for use in commercial, light-industrial, and heavy-industrial locations. In Europe, Canada, Australia, and New Zealand (per CISPR 11), Class A equipment is intended for use only in heavy-industrial locations.

Note Group 1 equipment (per CISPR 11) is any industrial, scientific, or medical equipment that does not intentionally generate radio frequency energy for the treatment of material or inspection/analysis purposes.

Note For EMC declarations, certifications, and additional information, refer to Product Certifications and Declarations.

Product Certifications and Declarations

Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for NI products, visit ni.com/product-certifications, search by model number, and click the appropriate link.

Environmental Management

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 Engineering a Healthy Planet 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.

EU and UK Customers

Waste Electrical and Electronic Equipment (WEEE)—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.

电子信息产品污染控制管理办法（中国RoHS）

中国RoHS— NI符合中国电子信息产品中限制使用某些有害物质指令(RoHS)。关于NI中国RoHS合规性信息，请登录 ni.com/environment/rohs_china。(For information about China RoHS compliance, go to ni.com/environment/rohs_china.)

¹ The PXI-2575 is not recommended for 2-wire resistance measurements.

² 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.

³ 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.

⁴ To ensure the typical thermal EMF, power down all relays and avoid pulsing high currents near the channels you are measuring. For more information about powering down latching relays, refer to the Power Down Latching Relays After Debounce property in NI-SWITCH or the Power Down Latching Relays After Settling property in NI-DAQmx.

⁵ Each relay in the PXI-2575 is shared by two channels.

⁶ Certain applications may require additional time for proper settling. Refer to NI Switches Help for more information about including additional settling time.

⁷ Relays are field replaceable. Refer to NI Switches Help for more information about replacing a failed relay.

⁸ The PXI-2575 recognizes trigger pulse widths less than 150 ns if digital filtering is disabled. For information about disabling digital filtering, refer to the NI Switches Help.

⁹ Some versions of the PXI-2575 are built with silver, gold covered. Contact NI for more details on specific versions.