Page 2 - Note
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...
Page 3 - Safety Guidelines; Hot Surface; Safety Guidelines for Hazardous Locations; not; not
© 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...
Page 4 - Special Conditions for Hazardous Locations Use in Europe
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...
Page 5 - Special Conditions for Marine Applications
© 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...
Page 6 - tp
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 DO0DO1DO2DO3DO4DO5DO6DO7VsupVsupDO8DO9DO10DO11DO12DO13DO14DO15NC COMCOMCOMCOMC...
Page 7 - Specifications
© 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...
Page 8 - Using Long Cables
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...
Page 9 - Protecting the Module from Flyback Voltages
© 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...
Page 12 - Output Current Limit Thresholds; Overcurrent Protection
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...
Page 13 - Safe Operating Current
© 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 ...
Page 14 - Overcurrent Refresh
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...
Page 16 - Example One
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...
Page 17 - Example Two; Example
© 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...
Page 18 - Sleep Mode
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...
Page 19 - Output Characteristics
© 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 ..........
Page 22 - Power Requirements
NI 9478 Operating Instructions and Specifications 22 ni.com Power Requirements Power cons u mption from chassis Active mode ............................... 1 W maxSleep mode ................................. 25 μ W max Thermal dissipation (at 70 °C) Active mode ............................... 1.5 W ...
Page 23 - Safety; Maximum Voltage; MAINS
© 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 ...
Page 24 - Isolation Voltages
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..............................
Page 25 - Hazardous Locations; Environmental
© 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, ...
Page 26 - Shock and Vibration
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...
Page 27 - Electromagnetic Compatibility; CE Compliance
© 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...
Page 28 - Environmental Management; NI and the; Waste Electrical and Electronic Equipment (WEEE); EU Customers; must
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...
Page 29 - ⬉ᄤֵᙃѻક∵ᵻࠊᄣ⧚ࡲ⊩ ˄Ё; RoHS; National Instruments; about China RoHS compliance, go to
© 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...
Page 30 - Where to Go for Support
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...
