National InstrumentsメーカーNI 9478の使用説明書/サービス説明書
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OPERATING INSTRUCTIONS AND S PECIFICATIONS NI 9478 16-Channel, 0–50 V, Sinking Digital Output Module with Programmable Current Limits ni.com/manuals Deutsch Français.
NI 9478 Operating I nstruction s and Specificati ons 2 ni.com This doc u ment describes ho w to u se the National Instr u ments 9478 and incl u des specif ications and pin assignments for the NI 9478. Vi s i t ni.com/info and enter rd s oftwarever s ion to determine which software yo u need for the mod u les yo u are u sing.
© National Inst ruments Corp. 3 NI 9478 Operating Instructi ons and Specific ations Safety Guidelines Operate the NI 9478 only as described in these operating instr u ctions. Hot Surface This icon denotes that the component may be hot. T o u ching this component may res u lt in bodily inj u ry .
NI 9478 Operating I nstruction s and Specificati ons 4 ni.com Caution S u bstit u tion of components may impair s u itability for Class I, Division 2. Caution For Zone 2 applications, install the system in an enclos u re rated to at least IP 54 as defined b y IEC 60529 an d EN 60529 .
© National Inst ruments Corp. 5 NI 9478 Operating Instructi ons and Specific ations Special Conditions fo r Marine Appli cations Some mod u les are Lloyd’ s Re gister (LR) T ype Approv ed for marine applications. T o verify Lloyd’ s Register certification, visit ni.
NI 9478 Operating I nstruction s and Specificati ons 6 ni.com Connecting the NI 9478 The NI 9478 has a 37-pin DSUB connector that pro vides connections for the 16 digital o u tp u t channels.
© National Inst ruments Corp. 7 NI 9478 Operating Instructi ons and Specific ations Each channel of the NI 9478 has a DO pin to which yo u can connect the load yo u want to control. Each channel also has a COM pin. National Instr u ments recommends yo u provide independent COM wiring for each channel to min imize c u rrent flo w in the COM wiring.
NI 9478 Operating I nstruction s and Specificati ons 8 ni.com Connect the de vice to DO and the positi ve lead o f the po wer s u pply . Refer to Fig u re 2 for an ill u stration of how to connect a device to the NI 9478.
© National Inst ruments Corp. 9 NI 9478 Operating Instructi ons and Specific ations Protecting the Mo dule from Flyback V oltage s If the mod u le is switching an ind u ctive or ener gy-storing devic.
NI 9478 Operating I nstruction s and Specificati ons 10 ni.com Using Long Cables The ind u ctance of the ca bling that co nnects the NI 947 8, the loads, and the e xternal s u pply stores u p ener gy when a channel is on and passing c u rrent thro u gh the cables.
© National Inst ruments Corp. 11 NI 9478 Operating Instructi ons and Specific ations Yo u can red u ce the ef fect iv e length of the cabl e by adding a capacitor close to the NI 9478 across the power s u pply leads and adding a diode from the digital o u tp u t line to the V s u p pin line.
NI 9478 Operating I nstructions and Specifications 12 ni .com I/O Protection The NI 9478 pro vides protection against overc u rrent and short-circ u it conditions. Output Current Limit Thresholds The NI 9478 pro vides two config u rable c u rrent limit thresholds for the mod u le, Limit A and Limit B.
© National Inst ruments Corp. 13 NI 9478 Operating Instructions and Specific ations Some applications req u ire a large inr u sh c u rrent when a channel is fir st t u rned on.
NI 9478 Operating I nstructions and Specifications 14 ni .com Overcurrent Refresh The NI 9478 pro vides an overc u rrent refresh setting that enables a channel to a u tomatically reco ver within the specif ied overc u rrent refresh period if the channel e xceeds its c u rrent limit threshold.
© National Inst ruments Corp. 15 NI 9478 Operating Instructions and Specific ations for that ch annel. Use the fo llowing eq u ation to ca lc u late the percentage of the total po wer b u dget each o u tp u t channel u ses in yo u r application.
NI 9478 Operating I nstructions and Specifications 16 ni .com Example One Yo u are driving a load with 2.0 meters of cable thro u gh a cy cle in which the NI 9478 is on and passing 1.25 A of c u rrent for 40 μ s, then off for 10 μ s. The o u tp u t period is 50 μ s (40 μ s + 10 μ s) so the o u tp u t freq u ency is 20 kHz.
© National Inst ruments Corp. 17 NI 9478 Operating Instructions and Specific ations Example T wo Yo u are driving a load with 2.0 meters of cable thro u gh a cy cle in which the NI 9478 first is constantly on and passing 3 A of c u rrent for 0.25 seconds, then dri ves th e load at 20 kHz with 1.
NI 9478 Operating I nstructions and Specifications 18 ni.com Sleep Mode This mod u le s u pports a low-po wer sleep mode. S u pport for sleep mode at the system le vel depe nds on the chassis that the mod u le is pl u gged into. Refer to the chassis man u al for information abo u t s u pport for sleep mode.
© National Inst ruments Corp. 19 NI 9478 Operating Instructions and Specific ations Specifications The follo wing specificat ions are typical for the range – 40 to 70 °C u nless otherwise noted. All v oltages are relativ e to COM u nless otherwise noted.
NI 9478 Operating I nstructions and Specifications 20 ni.com Switched o u tp u t c u rrent (10 kHz) 1 , per channel All channels on .......... ............ ..... 1 A max Fo u r channels on ................ ........ 2 A max One channel on . ...........
© National Inst ruments Corp. 21 NI 9478 Operating Instructions and Specific ations Overc u rrent protection threshold selection per ch annel........ ............ ..... Limit A, Limit B, or No Limit Overc u rrent sh u tof f response time .... 1 μ s Overc u rrent refresh conf ig u ration .
NI 9478 Operating I nstructions and Specifications 22 ni.com Power Requirements Power cons u mption fr om chassis Active mode ............ ........... ........ 1 W max Sleep mode .......... ......... ........... ... 25 μ W max Thermal dissipation (at 70 °C) Active mode .
© National Inst ruments Corp. 23 NI 9478 Operating Instructions and Specific ations Safety Maximum Voltage 1 Connect only v oltages that are within the follo wing limits.
NI 9478 Operating I nstructions and Specifications 24 ni.com Isolation Voltages Channel-to-channel ...... ............. ........ No isolation bet ween channels Channel-to-earth gro u nd Contin u o u s ................... ......... ..... 60 VDC, Meas u rement Category I W ithstand .
© National Inst ruments Corp. 25 NI 9478 Operating Instructions and Specific ations Hazardous Locations U.S. (UL) ........ ........... ......... ........... ... Class I, Di vision 2, Gro u ps A, B, C, D, T4; Class I, Zone 2, AEx nA IIC T4 Canada (C-UL) .
NI 9478 Operating I nstructions and Specifications 26 ni.com Operating h u midity (IEC 60068-2-56)....... ........... ............ 10 to 90% RH, noncondensing Storage h u midity (IEC 60068-2-56)....... ........... ............ 5 to 95% RH, noncondensing Maxim u m altit u de.
© National Inst ruments Corp. 27 NI 9478 Operating Instructions and Specific ations Electromagnetic Compatibility This prod u ct is designed to meet the req u ire ments of the following standards of .
NI 9478 Operating I nstructions and Specifications 28 ni.com ni.com/certification , search by mod u le n u mber or prod u ct line, and click the appropriate link in the Certification col u mn. Environmental Mana gement National Instr u ments is committe d to designing and man u fact u ring prod u cts in an en vironmentally res ponsible manner .
© National Inst ruments Corp. 29 NI 9478 Operating Instructions and Specific ations ⬉ᄤֵᙃѻક∵ᶧࠊㅵ⧚ࡲ⊩ ˄Ё RoHS ˅ Ёᅶ᠋ National Instruments ヺড়Ё⬉ᄤֵᙃ ѻકЁ䰤ࠊՓ⫼ᶤѯ᳝ᆇ⠽䋼ᣛҸ (RoHS) DŽ݇Ѣ National Instruments Ё RoHS ড়㾘ᗻֵᙃˈ䇋ⱏᔩ ni.
NI 9478 Operating I nstructions and Specifications 30 ni.com Where to Go for Support The National Instr u ments W eb site is yo u r complete reso u rce for technical s u pport.
© National Inst ruments Corp. 31 NI 9478 Operating Instructions and Specific ations K orea 82 02 3451 3400, Lebanon 961 (0) 1 33 28 28, Malaysia 1800 887710, Mexico 0 1 800 010 0793, Netherlands 31 (.
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