PXI-2521 Specifications

These specifications apply to the PXI-2521 .

All specifications are subject to change without notice.

Notice The protection provided by the PXI-2521 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-2521 Pinout

Table 1. Signal Descriptions
Signal	Description
CHx+	Positive signal connection
CHx-	Negative signal connection
COMx+	Routing destination for the corresponding positive signal connection
COMx-	Routing destination for the corresponding negative signal connection

Cleaning the Module

Clean devices and terminal blocks by brushing off light dust with a soft, nonmetallic brush. Remove other contaminants with a soft, lint-free, dampened cloth. Do not use detergent or chemical solvents. The unit must be completely dry and free from contaminants before returning to service.

Cautions

Caution This module is rated for Measurement Category I and intended to carry signal voltages no greater than 150 V. This module can withstand up to 800 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 V AC or 230 V AC. Refer to the Read Me First: Safety and Electromagnetic Compatibility document for more information about measurement categories.

Caution When hazardous voltages (>42.4 Vpk/60 V DC) are present on any channel, safety low-voltage (≤42.4 Vpk/60 V DC) cannot be connected to any other channel.

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

Input Characteristics

Maximum switching voltage
Channel-to-channel	150 V
Channel-to-ground	150 V, CAT I

Maximum switching power (per channel)

60 W, 62.5 VA (DC to 60 Hz)

Maximum current (switching or carry, per channel)

2 A

Simultaneous channels at maximum current (≤55 °C)

40

Minimum switching conditions

20 mV/1 mA

Note 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.

DC path resistance
Initial	<0.5 Ω
End-of-life	≥1.0 Ω

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 (typical at 23 °C)

12 µV

Bandwidth (-3 dB, typical at 23 °C, 50 Ω termination)
1-wire	≤30 MHz
2-wire	≤25 MHz

Crosstalk (typical at 23 °C, 50 Ω termination), Channel-to-channel
10 kHz	≤-75 dB
100 kHz	≤-50 dB

Isolation (typical at 23 °C, 50 Ω termination), Open channel
10 kHz	≥75 dB
100 kHz	≥55 dB

Dynamic Characteristics

Relay operate time

1 ms, typical

3.4 ms, maximum

Simultaneous drive limit

40 relays

Expected relay life

Mechanical

1 × 10⁸ cycles

Electrical (resistive)
30 V, 1 A	5 × 10⁵ cycles
30 V, 2 A	1 × 10⁵ cycles

Trigger Characteristics

Table 2. Input Trigger
Sources	PXI trigger lines <0...7>
Minimum pulse width	150 ns

Note The PXI-2521 recognizes pulse widths less than 150 ns if digital filtering is disabled. Refer to the NI-SWITCH User Manual for information about disabling digital filtering.

Table 3. Output Trigger
Destinations	PXI trigger lines <0...7>
Default pulse width	2 µs, typical

Physical Characteristics

Relay type	Electromechanical, non-latching
Relay contact material	Palladium-ruthenium, gold covered
I/O connector	160 DIN 41612, 160 positions, male

Power requirement

7 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

182 g (6.4 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.)