# NI 2834A/B Specifications

Version:

This document lists specifications for the NI 2834A/B matrix relay card. All specifications are subject to change without notice. Visit ni.com/manuals for the most current specifications. Refer to the NI Switches Help for detailed topology information.

 Topology 2-wire 8 × 34 matrix

Specifications characterize the warranted performance of the instrument under the stated operating conditions.

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.

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 100 Vrms//100 VDC. 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 VAC or 230 VAC. Refer to the Read Me First: Safety and Electromagnetic Compatibility document for more information on measurement categories.

Caution

Measurement Categories CAT I and CAT O are equivalent. These test and measurement circuits are not intended for direct connection to the MAINs building installations of Measurement Categories CAT II, CAT III, or CAT IV.

Caution

In systems that include cards with different maximum voltages, the lowest safety voltage rating as specified on the front of the card applies for the entire system. The system can include all cards in the carrier, and all cards in other carriers that are connected with the NI 2806 expansion bridge.

Caution

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

Caution

Refer to the Read Me First: Safety and Electromagnetic Compatibility document for important safety and electromagnetic compatibility information. To obtain a copy of this document online, visit ni.com/manuals, and search for the document title.

Caution

To ensure the specified EMC performance, operate this product only with shielded cables and accessories.

Caution

The protection provided by the NI 2834A/B can be impaired if it is used in a manner not described in this document.

Caution

Always disconnect or turn off power sources before powering on a chassis.

### Input Characteristics

Maximum switching voltage

Row/column-to-ground

100 V, CAT I

Row-to-column

100 V

Maximum switching current

2.0 A (per channel)

Maximum carry current

2.0 A (per channel)

Maximum switching power

60 W, 62.5 VA (per channel)

Maximum switching power

60 W (per crosspoint)

Simultaneous channels at maximum current

8

DC path resistance

Initial

1 Ω

End-of-life

≥2 Ω

Open channel

>10 GΩ

Note

DC path resistance typically remains low for the life of the relay. At the end of relay life, the path resistance rises rapidly above the specified value. Load ratings apply to relays used within the specification before the end of relay life.

Thermal EMF, typical

<10 μV

Bandwidth, typical (-3 dB, 50 Ω termination, column-row-column)

≥10 MHz

Crosstalk, typical (50 Ω termination) channel-to-channel

10 kHz

<-75 dB

100 kHz

<-70 dB

1 MHz

<-50 dB

Isolation, typical (50 Ω termination) open channel

10 kHz

>80 dB

100 kHz

>65 dB

1 MHz

>45 dB

20 mV/10 mA

Analog bus line connections

AB <0...15> (16 Lines)

### Dynamic Characteristics

 Relay operate/release time, typical[2] <5 ms
Note

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

Expected relay life, mechanical (no load)

1 × 108 cycles

Expected relay life, electrical (resistive, <10 pF load)

10 V, 100 mA

2.5 × 106 cycles

10 V, 1 A

1 × 106 cycles

30 V, 1 A

5 × 105 cycles

60 V, 1 A

1 × 105 cycles

100 V, 0.3 A

5 × 105 cycles

30 V, 2 A

1 × 105 cycles

Note

Relays are field replaceable. Refer to NI Switches Help for information about replacing failed relays.

### Physical Characteristics

 Relay type Electromechanical, latching Relay contact material Palladium-ruthenium, gold covered I/O connectors 160 position, DIN Power requirement, carrier 20 W at 5 V, 5 W at 3.3 V Dimensions (L × W × H) 11.2 cm × 1.2 cm × 17.1 cm (4.4 in. × 0.5 in. × 6.7 in.) Weight 373 g (13.2 oz)

#### Connector Pinout

Figure 1. NI 2834A/B Connector Pinout

## Accessories

Caution

Use only NI cables. Cables with metal connectors might expose the user to hazardous voltages.

Note

To ensure the specified EMC performance, operate this product only with shielded cables and accessories. Do not use unshielded cables or accessories unless they are installed in a shielded enclosure with properly designed and shielded input/output ports and are connected to the NI product using a shielded cable. If unshielded cables or accessories are not properly installed and shielded, the EMC specifications for the product are no longer guaranteed.

Table 1. NI Accessories for the NI 2834A/B
Accessory Part number
SH160F-160M-NI SwitchBlock Cable 153028-01
NI TBX-2808 screw terminal accessory for NI SwitchBlock (unshielded) 781420-08

## Accessories

Caution

Use only NI cables. Cables with metal connectors might expose the user to hazardous voltages.

Note

To ensure the specified EMC performance, operate this product only with shielded cables and accessories. Do not use unshielded cables or accessories unless they are installed in a shielded enclosure with properly designed and shielded input/output ports and are connected to the NI product using a shielded cable. If unshielded cables or accessories are not properly installed and shielded, the EMC specifications for the product are no longer guaranteed.

Table 2. NI Accessories for the NI 2834A/B
Accessory Part number
SH160F-160M-NI SwitchBlock Cable 153028-01
NI TBX-2808 screw terminal accessory for NI SwitchBlock (unshielded) 781420-08

## Derating NI 2834A/B Load at >40 °C

To verify you are operating the NI 2834A/B within supported derating conditions, complete the following steps:
1. Use the following equation to calculate the load: $\mathrm{Load}={\mathrm{Channels}}_{1}×{\mathrm{Current}}_{1}^{2}+{\mathrm{Channels}}_{2}+{\mathrm{Current}}_{2}^{2}+\text{\hspace{0.17em}}...+{\mathrm{Channels}}_{n}×{\mathrm{Current}}_{n}^{2}$ 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.
• If a high-density card is not installed in the carrier, verify the load falls in the 2-wire, no high-density shaded region.
• If a high-density card (NI 2815/NI 2816) is installed in the carrier, verify the load falls in the 2-wire, with high-density shaded region.
Figure 2. NI 2834A/B Load Derating

## Module Load Derating at >40 °C

The following examples calculate supported derating conditions for the NI 2834A/B.

### Example 1: No high-density module in the carrier

$\left(3×{2}^{2}\right)÷\left(4×{1.7}^{2}\right)=23.6{A}^{2}×\mathrm{channels}$
 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: An NI 2815 high-density module in the carrier

$\left(3×{2}^{2}\right)÷\left(4×{1.7}^{2}\right)=23.6{A}^{2}×\mathrm{channels}$
 where 3 channels carry 2 A 4 channels carry 1.7 A

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

### Example 3: No high-density module in the carrier

$\left(3×{2}^{2}\right)÷\left(4×{1.7}^{2}\right)=23.6{A}^{2}×\mathrm{channels}$

where 8 channels carry 2 A

You can use this module at ambient temperatures between 0 °C and 40 °C.

## 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

-20 °C to 70 °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.)

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, 0.3 grms

Nonoperating

5 Hz to 500 Hz, 2.4 grms (Tested in accordance with IEC-60068-2-64. Nonoperating test profile exceeds the requirements of MIL-PRF-28800F, Class 3.)

## Compliance and Certifications

### Safety

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 61010-1
Note

For UL and other safety certifications, refer to the product label or the Online Product Certification 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
• AS/NZS CISPR 11: Group 1, 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 Online Product Certification section.

### CE Compliance

This product meets the essential requirements of applicable European Directives, as follows:
• 2006/95/EC; Low-Voltage Directive (safety)
• 2004/108/EC; Electromagnetic Compatibility Directive (EMC)

### Online Product Certification

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.

### 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 not only to the environment but also 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.

#### Waste Electrical and Electronic Equipment (WEEE)

EU Customers

At the end of the product life cycle, all products must be sent to a WEEE recycling center. For more information about WEEE recycling centers, National Instruments WEEE initiatives, and compliance with WEEE Directive 2002/96/EC on Waste Electrical and Electronic Equipment, visit ni.com/environment/weee.

#### 电子信息产品污染控制管理办法（中国RoHS）

中国客户

National Instruments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National Instruments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 minimum switch load is not recommended for 2-wire resistance measurements.
• 2 Relay operate and release times depend on PC and PXI bus performance and application software. For more information about NI SwitchBlock relay operate times, visit ni.com/info and enter the Info Code exa9ee.