National Instruments NI 9474 Getting Started Manual Download Page 12 | Manualshive

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National Instruments NI 9474 Getting Started Manual Download Page 12

Connecting Digital Devices

You can connect a variety of industrial devices, such as solenoids,
motors, actuators, relays, and lamps to the NI 9474. You must
connect an external power supply to the NI 9474. The power
supply provides the current for the output channels.

Figure 1.

Connecting an Industrial Device to the NI 9474

External
Power
Supply

NI 9474

+
_

COM

V

sup

Device

DO

Caution

Do not install or remove C Series modules

from your system if the external power supply
connected to the Vsup and COM pins is powered on.

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NI 9474 Getting Started Guide

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Summary of Contents for NI 9474

Page 1: ...GETTING STARTED GUIDE NI 9474 8 DO 5 V to 30 V Sourcing 1 μs ...

Page 2: ...ific to the NI 9474 The other components in the system might not meet the same safety ratings Refer to the documentation for each component in the system to determine the safety and EMC ratings for the entire system Safety Guidelines Operate the NI 9474 only as described in this document Caution Do not operate the NI 9474 in a manner not specified in this document Product misuse can result in a ha...

Page 3: ...y Voltages Connect only voltages that are within the following limits Channel to COM 30 VDC maximum Isolation Channel to channel None Channel to earth ground Continuous 250 Vrms Measurement Category II Withstand 2 300 Vrms verified by a 5 s dielectric withstand test Measurement Category II is for measurements performed on circuits directly connected to the electrical distribution system NI 9474 Ge...

Page 4: ...ollowing precautions A hazardous voltage is a voltage greater than 42 4 Vpk voltage or 60 VDC to earth ground Caution Ensure that hazardous voltage wiring is performed only by qualified personnel adhering to local electrical standards Caution Do not mix hazardous voltage circuits and human accessible circuits on the same module Caution Ensure that devices and circuits connected to the module are p...

Page 5: ...n 2 Groups A B C D T4 hazardous locations Class I Zone 2 AEx nA IIC T4 and Ex nA IIC T4 hazardous locations and nonhazardous locations only Follow these guidelines if you are installing the NI 9474 in a potentially explosive environment Not following these guidelines may result in serious injury or death Caution Do not disconnect I O side wires or connectors unless power has been switched off or t...

Page 6: ...f there is a transient overvoltage condition Special Conditions for Hazardous Locations Use in Europe and Internationally The NI 9474 has been evaluated as Ex nA IIC T4 Gc equipment under DEMKO Certificate No 03 ATEX 0324020X and is IECEx UL 14 0089X certified Each NI 9474 is marked II 3G and is suitable for use in Zone 2 hazardous locations in ambient temperatures of 40 C Ta 70 C If you are using...

Page 7: ...door or cover accessible only by the use of a tool Electromagnetic Compatibility Guidelines This product was tested and complies with the regulatory requirements and limits for electromagnetic compatibility EMC stated in the product specifications These requirements and limits provide reasonable protection against harmful interference when the product is operated in the intended operational electr...

Page 8: ...thority to operate it under your local regulatory rules Special Conditions for Marine Applications Some products are Lloyd s Register LR Type Approved for marine shipboard applications To verify Lloyd s Register certification for a product visit ni com certification and search for the LR certificate or look for the Lloyd s Register mark on the product Caution In order to meet the EMC requirements ...

Page 9: ... meets the following specifications Operating temperature IEC 60068 2 1 IEC 60068 2 2 40 C to 70 C Operating humidity IEC 60068 2 78 10 RH to 90 RH noncondensing Pollution Degree 2 Maximum altitude 2 000 m Indoor use only Note Refer to the device datasheet on ni com manuals for complete specifications NI 9474 Getting Started Guide National Instruments 9 ...

Page 10: ...NI 9474 Pinout DO0 DO1 DO2 DO3 DO4 DO5 DO6 DO7 Vsup COM 0 1 2 3 4 5 6 7 8 9 DO0 DO1 DO2 DO3 DO4 DO5 DO6 DO7 Vsup COM 0 1 2 3 4 5 6 7 8 9 10 ni com NI 9474 Getting Started Guide ...

Page 11: ...able 1 NI 9474 Signal Descriptions Signal Description COM Common reference connection to isolated ground DO Digital output signal connection Vsup Voltage supply connection Table 2 LED Indicators LED Pattern Indication Solid The channel has been programmed to be in the ON state Off The channel has been programmed to be in the OFF state NI 9474 Getting Started Guide National Instruments 11 ...

Page 12: ...r supply to the NI 9474 The power supply provides the current for the output channels Figure 1 Connecting an Industrial Device to the NI 9474 External Power Supply NI 9474 _ COM Vsup Device DO Caution Do not install or remove C Series modules from your system if the external power supply connected to the Vsup and COM pins is powered on 12 ni com NI 9474 Getting Started Guide ...

Page 13: ...e Info Code CSeriesDOPulseGen for more information Increasing Current Drive Each channel of the NI 9474 has a continuous output current of 1 0 A If you want to increase the output current to a device you can connect any number of channels together in parallel For example if you want to drive 4 A of current connect DO0 through DO3 in parallel as shown in the following figure You must turn all paral...

Page 14: ... Connections If your application is subject to high vibration NI recommends that you follow these guidelines to protect connections to the NI 9474 Use ferrules to terminate wires to the detachable connector Use the NI 9927 backshell kit with the NI 9474 with screw terminal or the NI 9981 backshell kit with the NI 9474 with spring terminal 14 ni com NI 9474 Getting Started Guide ...

Page 15: ... output current short circuit behavior and short circuit trip time specifications and information about conditions that may damage the module Note Refer to the IEC 61131 2 standard for more information about short circuit proof devices Note Because the NI 9474 includes internal flyback diodes you do not need to add external diodes when connecting to switching devices that store energy NI 9474 Gett...

Page 16: ...ndition If a device connected to the module is not working while the channel is on the module channel may be in an overcurrent state Neither the software nor the module LEDs indicate if an overcurrent condition occurs A channel LED may be on even if the channel is off because of an overcurrent condition To determine if the channel is in an overcurrent state measure the voltage between DO and Vsup ...

Page 17: ... reset the channel by turning it off Alternatively you can disconnect the external power supply from the chassis However doing so disconnects power from all the module channels Normal operation can resume after you correct the overcurrent condition and reset the channel NI 9474 Getting Started Guide National Instruments 17 ...

Page 18: ...uals RELATED INFORMATION C Series Documentation Resources ni com info cseriesdoc Services ni com services Installs with the software NI 9474 Datasheet NI RIO Help LabVIEW FPGA Help NI 9474 Datasheet NI DAQmx Help LabVIEW Help 18 ni com NI 9474 Getting Started Guide ...

Page 19: ...oduct Product registration facilitates technical support and ensures that you receive important information updates from NI A Declaration of Conformity DoC is our claim of compliance with the Council of the European Communities using the manufacturer s declaration of conformity This system affords the user protection for electromagnetic compatibility EMC and product safety You can obtain the DoC f...

Page 20: ...ucts technology refer to the appropriate location Help Patents in your software the patents txt file on your media or the National Instruments Patent Notice at ni com patents You can find information about end user license agreements EULAs and third party legal notices in the readme file for your NI product Refer to the Export Compliance Information at ni com legal export compliance for the NI glo...

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