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National Instruments PXIe-4353 Скачать руководство пользователя страница 14

NI PXIe-4353 and TB-4353 Terminal Block Installation Guide

14

ni.com

The TB-4353 contains eight thermistors that are used to measure the temperature of the adjacent screw
terminal junctions for the CJC that is performed when computing the thermocouple temperature
measurement. These eight thermistors are measured using the CJC channels on the NI PXIe-4353
module. Each thermistor measures the CJC temperature for a subset of associated thermocouple
channels as shown in Figure 10. The dashed lines indicate the channel to CJC associations.NI-DAQmx
automatically associates the correct thermistor with the thermocouple measurements when you use the

Thermocouple Channel-Type

and select

built-in

for the CJC source.

Figure 10.

TB-4353 CJC Grouping Locations

1

CJC0

2

CJC1

3

CJC2

4

CJC3

5

CJC4

6

CJC5

7

CJC6

8

CJC7

Table 2.

CJC to Thermocouple Channels Associations

CJC

Associated Thermocouples

CJC

Associated Thermocouples

CJC0

AI <0..2>

CJC4

AI <11..13>,

AI <19..21>

CJC1

AI <3..5>

CJC5

AI <14, 15>,

AI <22, 23>

CJC2

AI <6, 7>

CJC6

AI <24..27>

CJC3

AI <8..10>,

AI <16..18>

CJC7

AI <28..31>

COM

TC0

TC1

TC2

TC

3

TC4

TC5

TC6

TC7

TC

8

T

C

9

TC10

TC11

TC12

TC1

3

TC14

TC15

TC1

8

TC17

TC16

TC19

TC20

TC21

TC22

TC2

3

TC26

TC25

TC24

TC27

TC2

8

TC29

TC

3

0T

C

3

1

+ – + – + – + – + – + – + – + –

+ – + – + – + – + – + – + – + –

+ – + – + – + – + – + – + – + –

+ – + – + – + – + – + – + – + –

1

2

5

3

6

8

4

7

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Содержание PXIe-4353

Страница 1: ...wing module as specified NI PXIe 4353 80 mV maximum voltage measurement range Note Refer to the NI PXIe 4353 Specifications document for additional voltage and safety information The keying of this terminal block prevents it from connecting to other modules that could be damaged by the voltage present on the terminal block However you should only use this terminal block with its supported modules ...

Страница 2: ...5 Where to Go for Support 16 Specifications 17 Electrical 17 Calibration 17 Mechanical 17 Physical 18 Environmental Specifications 18 Operating Environment 18 Storage Environment 18 Shock and Vibration 19 Safety Voltages 19 Safety Standards 19 Electromagnetic Compatibility 19 CE Compliance 20 Online Product Certification 20 Environmental Management 20 What You Need to Get Started To set up and use...

Страница 3: ...Using an NI DAQmx simulated device you can test NI DAQmx applications without installing hardware Refer to the Create a Simulated Device section for instructions for creating NI DAQmx simulated devices Step 2 Unpack and Install the Module Remove the packaging and inspect the module Contact NI if the module is damaged Do not install a damaged module Caution The module is static sensitive Always pro...

Страница 4: ... module along the guides until it reaches the rear connector then seat the module by pushing the front panel until it is flush with the front panel of the chassis 6 Secure the module to the chassis using the front panel captive screws shown in Figure 2 Tighten the screws to 0 31 N m 2 7 lb in Figure 2 Installing NI SC Express Modules 1 PXI Express System Controller Slot 2 PXI Peripheral Slot 3 PXI...

Страница 5: ... following steps Note You can find the pinout names and locations in MAX at any time by right clicking the device name under Devices and Interfaces and selecting Device Pinouts 1 Loosen the captive top cover screws and remove the top cover 2 Loosen the strain relief screws and remove the strain relief bar 3 Prepare the signal wire by stripping the insulation no more than 7 mm 0 28 in 4 Run the sig...

Страница 6: ...e connect COM to earth ground or a fixed reference voltage depending on your isolation requirements All thermocouple channels with respect to COM on the NI PXIe 4353 must remain within 10 V Refer to the NI PXIe 4353 User Manual for more information about proper connection of the COM terminal Caution Any wires connected to the ground must be sufficiently insulated from high voltage 7 Attach cable s...

Страница 7: ...to position in front of the NI PXIe 4353 and engage the alignment feature with the guide on the associated module Figure 5 Installing the TB 4353 on the NI PXIe 4353 Module 2 Attach the TB 4353 to the NI PXIe 4353 module by pushing the terminal block straight into the module A spring mechanism will lock in the bottom of the terminal block 3 Tighten the mounting screw at the top of the TB 4353 to a...

Страница 8: ...rsion of NI DAQmx If you are using an older version of the driver software the NI SC Express terminal block may work only in basic functionality mode Unsupported terminal blocks appear in Measurement Automation Explorer MAX with an X next to them 1 Launch MAX 2 Expand Devices and Interfaces NI DAQmx Devices to confirm that MAX detects the module and terminal block The terminal block should appear ...

Страница 9: ...rs If an error occurs refer to ni com support daqmx For information about sensors go to ni com sensors Step 6 Run Test Panels 1 In MAX expand Devices and Interfaces NI DAQmx Devices 2 Right click the device and select Test Panels 3 Click Start to test device functions or Help for operating instructions To troubleshoot errors refer to the NI DAQmx Help or go to ni com support Step 7 Take an NI DAQm...

Страница 10: ... Examples NI DAQmx includes example programs to help you get started developing an application LabVIEW and CVI examples are located at Help Find Examples in your application software Text based code examples are located at All Programs National Instruments NI DAQ Text Based Code Support ANSI C Examples Modify example code and save it in an application or use examples to develop a new application o...

Страница 11: ...minal block 2 To remove the terminal block using a latch release a Raise the latch release using a flathead screwdriver to disengage the latch b With the latch release raised grasp the terminal block and pull it away from the module Figure 7 Removing the TB 4353 from the NI PXIe 4353 Module Latch Release Method Refer to Figure 8 to remove the terminal block from the module while completing the fol...

Страница 12: ...he front panel to remove the module Doing so may cause module components to come into contact with adjacent modules causing damage to the modules 3 Pull the captive screws to unseat the module and slowly slide the module along the guides as shown in Figure 9 4 Replace the filler panel in the empty slot 5 Store the module in an antistatic protective bag 1 PXIe Controller 2 PXIe Chassis 3 TB 4353 Te...

Страница 13: ...presentative compensating voltage to the voltage measured by the thermocouple channel The accuracy of the cold junction temperature measurement is a key part of the accuracy of the overall thermocouple temperature measurement The TB 4353 is carefully designed to ensure high accuracy cold junction temperature measurements under a variety of conditions however care must be taken to ensure the best p...

Страница 14: ... channel to CJC associations NI DAQmx automatically associates the correct thermistor with the thermocouple measurements when you use the Thermocouple Channel Type and select built in for the CJC source Figure 10 TB 4353 CJC Grouping Locations 1 CJC0 2 CJC1 3 CJC2 4 CJC3 5 CJC4 6 CJC5 7 CJC6 8 CJC7 Table 2 CJC to Thermocouple Channels Associations CJC Associated Thermocouples CJC Associated Thermo...

Страница 15: ...s and can introduce error Allow the thermal gradients to settle after a change in system power or in ambient temperature A change in system power can happen when the system powers on Refer to the warm up time in the NI PXIe 4353 Specifications for more information Replace the fan filters in the PXIe chassis regularly to ensure proper system cooling Calibrate the Module and Terminal Block To downlo...

Страница 16: ... safety You can obtain the DoC for your product by visiting ni com certification If your product supports calibration you can obtain the calibration certificate for your product at ni com calibration National Instruments corporate headquarters is located at 11500 North Mopac Expressway Austin Texas 78759 3504 National Instruments also has offices located around the world to help address your suppo...

Страница 17: ... B 2 3414908 10 4 C 8 7706554 10 8 CJC accuracy2 Input voltage range Refer to the NI PXIe 4353 Specifications document Calibration Calibration interval 1 year Mechanical Screw terminal wire gauge 14 AWG max 1 Refer to the software documentation for details about scaling the thermistor readings 2 This includes the combined effects of the thermistor accuracy and the temperature difference between th...

Страница 18: ...ance with IEC 60068 2 1 and IEC 60068 2 2 Meets MIL PRF 28800F Class 3 low temperature limit and MIL PRF 28800F Class 2 high temperature limit 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 Meets MIL PRF 28800F Class 3 limits Relative humidit...

Страница 19: ...gnals or use for measurements within Measurement Categories III or IV Caution The protection provided by the TB 4353 can be impaired if it is used in a manner not described in this document Safety Standards This product meets the requirements of the following standards of safety for electrical equipment for measurement control and laboratory use IEC 61010 1 EN 61010 1 UL 61010 1 CSA 61010 1 Note F...

Страница 20: ... 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 Refer to the product Declaration of Conformity DoC for additional regulatory compliance information To obtain product certifications and the DoC for this product visit n...

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