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- Operating Instructions Manual
National Instruments NI 9478 Operating Instructions Manual
Summary of NI 9478
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Operating instructions and specifications ni 9478 16-channel, 0–50 v, sinking digital output module with programmable current limits ni.Com/manuals deutsch français.
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Ni 9478 operating instructions and specifications 2 ni.Com this doc u ment describes how to u se the national instr u ments 9478 and incl u des specifications and pin assignments for the ni 9478. Visit ni.Com/info and enter rd s oftwarever s ion to determine which software yo u need for the mod u le...
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© national instruments corp. 3 ni 9478 operating instructions and specifications 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. To u ching this component may res u lt in bodily inj u ry. Safety g...
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Ni 9478 operating instructions and specifications 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 by iec 60529 and en 60529. Caution for zone 2 a...
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© national instruments corp. 5 ni 9478 operating instructions and specifications special conditions for marine applications some mod u les are lloyd’s register (lr) type approved for marine applications. To verify lloyd’s register certification, visit ni.Com/certification and search for the lr certi...
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Ni 9478 operating instructions and specifications 6 ni.Com connecting the ni 9478 the ni 9478 has a 37-pin dsub connector that provides connections for the 16 digital o u tp u t channels. Figure 1. Ni 9478 pin assignments do0 do1 do2 do3 do4 do5 do6 do7 vsup vsup do8 do9 do10 do11 do12 do13 do14 do1...
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© national instruments corp. 7 ni 9478 operating instructions and specifications 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 t...
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Ni 9478 operating instructions and specifications 8 ni.Com connect the device to do and the positive lead of the power s u pply. Refer to fig u re 2 for an ill u stration of how to connect a device to the ni 9478. Figure 2. Connecting a device to the ni 9478 yo u m u st connect the v s u p pin to th...
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© national instruments corp. 9 ni 9478 operating instructions and specifications protecting the module from flyback voltages if the mod u le is switching an ind u ctive or energy-storing device s u ch as a solenoid, motor, or relay, and the device does not have flyback protection, install an externa...
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Ni 9478 operating instructions and specifications 10 ni.Com using long cables the ind u ctance of the cabling that connects the ni 9478, the loads, and the external s u pply stores u p energy when a channel is on and passing c u rrent thro u gh the cables. Each time a channel is t u rned off, the en...
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© national instruments corp. 11 ni 9478 operating instructions and specifications yo u can red u ce the effective length of the cable 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. National instr...
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Ni 9478 operating instructions and specifications 12 ni.Com i/o protection the ni 9478 provides protection against overc u rrent and short-circ u it conditions. Output current limit thresholds the ni 9478 provides two config u rable c u rrent limit thresholds for the mod u le, limit a and limit b. T...
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© national instruments corp. 13 ni 9478 operating instructions and specifications some applications req u ire a large inr u sh c u rrent when a channel is first t u rned on. If this inr u sh c u rrent exceeds the maxim u m c u rrent limit threshold, yo u may need to disable overc u rrent protection ...
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Ni 9478 operating instructions and specifications 14 ni.Com overcurrent refresh the ni 9478 provides an overc u rrent refresh setting that enables a channel to a u tomatically recover within the specified overc u rrent refresh period if the channel exceeds its c u rrent limit threshold. If overc u r...
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© national instruments corp. 15 ni 9478 operating instructions and specifications for that channel. Use the following eq u ation to calc u late the percentage of the total power b u dget each o u tp u t channel u ses in yo u r application. To verify that yo u r application keeps the ni 9478 within s...
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Ni 9478 operating instructions and specifications 16 ni.Com example one yo u are driving a load with 2.0 meters of cable thro u gh a cycle 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 f...
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© national instruments corp. 17 ni 9478 operating instructions and specifications example two yo u are driving a load with 2.0 meters of cable thro u gh a cycle in which the ni 9478 first is constantly on and passing 3 a of c u rrent for 0.25 seconds, then drives the load at 20 khz with 1.25 a c u r...
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Ni 9478 operating instructions and specifications 18 ni.Com sleep mode this mod u le s u pports a low-power sleep mode. S u pport for sleep mode at the system level depends 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 m...
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© national instruments corp. 19 ni 9478 operating instructions and specifications specifications the following specifications are typical for the range –40 to 70 °c u nless otherwise noted. All voltages are relative to com u nless otherwise noted. Output characteristics n u mber of channels............
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Ni 9478 operating instructions 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........................... 4 a max switched o u tp u t c u rrent (2...
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© national instruments corp. 21 ni 9478 operating instructions and specifications overc u rrent protection threshold selection per channel......................... Limit a, limit b, or no limit overc u rrent sh u toff response time.... 1 μ s overc u rrent refresh config u ration .... Enabled or disa...
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Ni 9478 operating instructions and specifications 22 ni.Com power requirements power cons u mption from chassis active mode ............................... 1 w max sleep mode ................................. 25 μ w max thermal dissipation (at 70 °c) active mode ............................... 1.5 w...
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© national instruments corp. 23 ni 9478 operating instructions and specifications safety maximum voltage 1 connect only voltages that are within the following limits. V s u p -to-com..................................... 50 vdc, meas u rement category i meas u rement category i is for meas u rements ...
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Ni 9478 operating instructions and specifications 24 ni.Com isolation voltages channel-to-channel........................... No isolation between channels channel-to-earth gro u nd contin u o u s ................................. 60 vdc, meas u rement category i withstand...............................
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© national instruments corp. 25 ni 9478 operating instructions and specifications hazardous locations u.S. (ul) .......................................... Class i, division 2, gro u ps a, b, c, d, t4; class i, zone 2, aex na iic t4 canada (c-ul) ................................. Class i, division 2,...
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Ni 9478 operating instructions 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............................. 2...
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© national instruments corp. 27 ni 9478 operating instructions and specifications electromagnetic compatibility this prod u ct is designed to meet the req u irements of the following standards of emc for electrical eq u ipment for meas u rement, control, and laboratory u se: • en 61326 emc req u ire...
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Ni 9478 operating instructions 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 management national instr u ments is committed to designing and man u fact u ring prod u cts i...
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© national instruments corp. 29 ni 9478 operating instructions and specifications ⬉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.Com/environmen t /rohs_china DŽ (for information about china rohs compliance, go to ni.Co...
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Ni 9478 operating instructions and specifications 30 ni.Com where to go for support the national instr u ments web site is yo u r complete reso u rce for technical s u pport. At ni.Com/ s upport yo u have access to everything from tro u bleshooting and application development self-help reso u rces t...
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© national instruments corp. 31 ni 9478 operating instructions and specifications korea 82 02 3451 3400, lebanon 961 (0) 1 33 28 28, malaysia 1800 887710, mexico 01 800 010 0793, netherlands 31 (0) 348 433 466, new zealand 0800 553 322, norway 47 (0) 66 90 76 60, poland 48 22 3390150, port u gal 351...
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