PXIe-2738 Specifications

This document lists specifications for the PXIe-2738 . All specifications are subject to change without notice.

PXIe-2738 Specifications

Specifications characterize the warranted performance of the instrument under the stated operating conditions. Data in this document are Specifications unless otherwise noted.

Typical Specifications are specifications met by the majority of the instrument under the stated operating conditions and are tested at 23 °C ambient temperature. Typical specifications are not warranted.

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

Caution The protection provided by the PXIe-2738 can be impaired if it is used in a manner not described in this document.

Topology

Topology

2-wire 8 × 32 matrix

Input Characteristics

Maximum switching voltage

Channel-to-channel

100 V

Channel-to-ground

100 V, CAT O

Note This module is rated for Measurement Category I. It is intended to carry signal voltages no greater than 70 Vrms, 100 Vpk, or 100 VDC. 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 VAC or 230 VAC.

Measurement Categories CAT I and CAT O (Other) are equivalent and are for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage. This category is for measurement of voltages from specially protected secondary circuits. Such voltage measurements include signal levels, special hardware, limited-energy parts of hardware, circuits powered by regulated low-voltage sources, and electronics.

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.

Maximum switching power

60 W, 62.5 VA

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

Switching

2 A (per channel)

Carry

2 A (per channel)

Minimum switching load

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 isolation resistance (channel-to-COM)

1 GΩ (typical at 25º C)

DC path resistance

Initial

<1.3 Ω, warranted

End-of-life

≥2.3 Ω

Path resistance is a combination of relay contact resistance and trace resistance. Measure path resistance by combining resistance of the high and low signal paths from one row to one column. Contact resistance typically remains low for the life of a relay. At the end of relay life, the contact resistance rises rapidly above ≥2.3 Ω.

Thermal EMF

<10 µV

RF Performance Characteristics

Bandwidth (-3 dB, typical at 23º C)

1-wire 50 Ω termination

≤ 10 MHz

2-wire 100 Ω termination

≤ 10 MHz

Open channel isolation (typical at 23º C, 50 Ω termination )

10 kHz

≥ 84 dB

100 kHz

≥ 71 dB

1 MHz

≥ 50 dB

Channel-to-channel crosstalk (typical at 23º C, 50 Ω termination )

10 kHz

≤ -69 dB

100 kHz

≤ -52 dB

1 MHz

≤ -33 dB

Dynamic Characteristics

Relay Operate Time

Typical

1 ms

Maximum

3.3 ms

Simultaneous drive limit

90 relays

Expected mechanical relay life

1 × 108 cycles

Expected electrical relay life

≤30 mV, ≤10 mA resistive

2.5 × 106 cycles

30 V, 1 A

5 × 105 cycles

30 V, 2 A

1 × 105 cycles

60 VDC, 1 ADC resistive

1 × 105 cycles

Note Relays are field replaceable. Refer to the NI Switches Help at ni.com/manuals for more information about replacing a failed relay.

Physical Characteristics

Relay type

Electromechanical, non-latching

Relay contact material

Palladium-ruthenium, gold covered

Front panel connector

160 DIN 41612, 160 positions, male

Power requirement
PXI Express

12 V

24 W

3.3 V

3.6 W

Dimensions (L × W × H)

3U, one slot, PXI/cPCI module, PXI Express compatible 21.6 cm × 2.0 cm × 13.0 cm (8.5 in. × 0.8 in. × 5.1 in.)

Weight

423 g (14.9 oz)

Environment

Maximum altitude

2,000 m (800 mbar) (at 25 °C ambient temperature)

Pollution Degree

2

Indoor use only.

Storage Environment

Ambient temperature range

-40 °C to 71 °C

Relative humidity range

5% to 95%, noncondensing

Shock and Vibration

Operating shock

30 g peak, half-sine, 11 ms pulse

Random vibration

Operating

5 Hz to 500 Hz, 0.3 grms

Nonoperating

5 Hz to 500 Hz, 2.4 grms

Derating PXIe-2738 Load at >50 °C

To verify you are operating the PXIe-2738 within supported 2-wire derating conditions, complete the following steps:
  1. Use the following equation to calculate the load:
    Load=Channels1×(Current1)2+Channels2×(Current2)2+ ...⁢+Channelsn×(Currentn)2
    where Channels is the number of channels that simultaneously carry a signal, Current, for 1, ... , n.
  2. Verify that the load at your ambient operating temperature falls within the shaded region of the following figure.
    Figure 1. PXIe-2738 Load Derating, 2-Wire

    1378

Module Load Derating at >50 °C

The following examples calculate supported derating conditions for the PXIe-2738 .

Example 1
(3×22)+(4×1.72)=23.6⁢A2×channels (3×22)+(4×1.72)=23.6⁢A2×channels
where 3 channels carry 2 A
4 channels carry 1.7 A

You can use this module at ambient temperatures between 0 °C and 55 °C.

Example 2
(8×22)=32⁢A2×channels (8×22)=32⁢A2×channels
where 8 channels carry 2 A

You can use this module at ambient temperatures between 0 °C and 50 °C.

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 the Product Certifications and Declarations section.

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
  • 1378 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）
  • 1378 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.)