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National Instruments NI 9478, Operating Instructions Manual

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National Instruments NI 9478 Operating Instructions Manual Download Page 29

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National Instruments Corp.

29

NI 9478 Operating Instructions and Specifications

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Summary of Contents for NI 9478

Page 1: ...OPERATING INSTRUCTIONS AND SPECIFICATIONS NI 9478 16 Channel 0 50 V Sinking Digital Output Module with Programmable Current Limits ni com manuals Deutsch Fran ais...

Page 2: ...and programming the system refer to the system documentation Visit ni com info and enter cseriesdoc for information about C Series documentation Note The safety guidelines and specifications in this d...

Page 3: ...Class I Division 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...

Page 4: ...must prevent the external power supply voltage from exceeding 70 V if there is a transient overvoltage condition Special Conditions for Hazardous Locations Use in Europe This equipment has been evalu...

Page 5: ...arch for the LR certificate or look for the Lloyd s Register mark on the module Caution To meet radio frequency emission requirements for marine applications use shielded cables and install the system...

Page 6: ...onnections for the 16 digital output channels Figure 1 NI 9478 Pin Assignments DO0 DO1 DO2 DO3 DO4 DO5 DO6 DO7 Vsup Vsup DO8 DO9 DO10 DO11 DO12 DO13 DO14 DO15 NC COM COM COM COM COM COM COM COM Vsup V...

Page 7: ...or the devices you connect to the module Connect the positive lead of the power supply to Vsup and the negative lead of the power supply to COM Caution Do not remove or insert modules if the external...

Page 8: ...ng diode that protects the module from cable inductance flyback This flyback voltage results from small amounts of energy stored in the inductance of the cabling Refer to the Using Long Cables section...

Page 9: ...storing device such as a solenoid motor or relay and the device does not have flyback protection install an external flyback diode as shown in Figure 3 Refer to the Using Long Cables section for more...

Page 10: ...the cables is released as flyback voltage and dissipates as heat in the NI 9478 The total power dissipated in the module increases with higher switching frequencies higher currents and longer cable le...

Page 11: ...l output line to the Vsup pin line National Instruments recommends that you use a capacitor with a capacitance of at least 20 F In this case the effective length of the cable is the distance from the...

Page 12: ...ent limit thresholds and check the current limit output status in software to determine if the current through each channel has exceeded the current limit thresholds Refer to the software help for mor...

Page 13: ...information about C Series documentation Caution The NI 9478 is not protected against output overcurrent or short circuit conditions when overcurrent protection is disabled If you disable overcurrent...

Page 14: ...refresh Visit ni com info and enter cseriesdoc for information about C Series documentation Safe Operating Current The maximum allowable output current depends on the output frequency and cable length...

Page 15: ...en add together the percentages for all the channels For operation in ambient temperatures from 55 to 70 C the total average power of all channels must remain under 100 For temperatures below 55 C the...

Page 16: ...of cable through a cycle in which the NI 9478 is on and passing 1 25 A of current for 40 s then off for 10 s The output period is 50 s 40 s 10 s so the output frequency is 20 kHz The channel uses 14 8...

Page 17: ...25 seconds then drives the load off for 4 seconds While the NI 9478 is constantly on the output frequency is 0 kHz and the channel uses 36 4 32 of the total power budget Example One shows that while...

Page 18: ...ode If the chassis supports sleep mode refer to the software help for information about enabling sleep mode Visit ni com info and enter cseriesdoc for information about C Series documentation Typicall...

Page 19: ...herwise noted Output Characteristics Number of channels 16 digital output channels Output type Sinking Power on output state Channels off Output voltage V0 I0R0 External power supply voltage range Vsu...

Page 20: ...els on 0 75 A max Four channels on 1 67 A max One channel on 3 33 A max Output impedance R0 50 m max Reversed voltage protection None Number of current limit settings 2 Limit A and Limit B Current lim...

Page 21: ...nse time 1 s Overcurrent refresh configuration Enabled or Disabled Overcurrent refresh period 20 2550 s in 10 s increments Overcurrent refresh period accuracy 7 max Propagation delay 250 ns max MTBF 8...

Page 22: ...ower Requirements Power consumption from chassis Active mode 1 W max Sleep mode 25 W max Thermal dissipation at 70 C Active mode 1 5 W max Sleep mode 25 W max Physical Characteristics If you need to c...

Page 23: ...ltage MAINS is a hazardous live electrical supply system that powers equipment This category is for measurements of voltages from specially protected secondary circuits Such voltage measurements inclu...

Page 24: ...ric withstand test Safety Standards This product is designed to meet the requirements of the following standards of safety for electrical equipment for measurement control and laboratory use IEC 61010...

Page 25: ...Ex nA IIC T4 Europe DEMKO Ex nA IIC T4 Environmental National Instruments C Series modules are intended for indoor use only but may be used outdoors if installed in a suitable enclosure Refer to the m...

Page 26: ...5 RH noncondensing Maximum altitude 2 000 m Pollution Degree IEC 60664 2 Shock and Vibration To meet these specifications you must panel mount the system Operating vibration Random IEC 60068 2 64 5 gr...

Page 27: ...ions Group 1 Class A CE C Tick ICES and FCC Part 15 Emissions Class A Note For EMC compliance operate this device with shielded cabling CE Compliance This product meets the essential requirements of a...

Page 28: ...beneficial not only to the environment but also to NI customers For additional environmental information refer to the NI and the Environment Web page at ni com environment This page contains the envir...

Page 29: ...orp 29 NI 9478 Operating Instructions and Specifications RoHS National Instruments RoHS National Instruments RoHS ni com environment rohs_china For information about China RoHS compliance go to ni com...

Page 30: ...al Instruments also has offices located around the world to help address your support needs For telephone support in the United States create your service request at ni com support and follow the call...

Page 31: ...1 0 348 433 466 New Zealand 0800 553 322 Norway 47 0 66 90 76 60 Poland 48 22 3390150 Portugal 351 210 311 210 Russia 7 495 783 6851 Singapore 1800 226 5886 Slovenia 386 3 425 42 00 South Africa 27 0...

Page 32: ...o the Terms of Use section on ni com legal for more information about National Instruments trademarks Other product and company names mentioned herein are trademarks or trade names of their respective...

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