Page 2 - Note; Safety Guidelines
NI 9472/9474 2 ni.com This doc u ment describes how to u se the National Instr u ments 9472 and National Instr u ments 9474 and incl u des specifications and terminal or pin assignments. In this doc u ment, the NI 9472/9474 with screw terminal and NI 9472 with DSUB are referred to incl u sively as t...
Page 3 - Hot Surface; Safety Guidelines for Hazardous Voltages; not
© National Instruments Corp. 3 NI 9472/9474 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 Guidelines for Hazardous Voltages Yo u can connect hazardo u s voltages only to the NI 9472/9474 with screw terminal. Do not conn...
Page 5 - Safety Guidelines for Hazardous Locations
© National Instruments Corp. 5 NI 9472/9474 Safety Guidelines for Hazardous Locations The NI 9472/9474 is s u itable for u se in Class I, Division 2, Gro u ps A, B, C, D, T4 hazardo u s locations; Class I, Zone 2, AEx nC IIC T4 and Ex nC IIC T4 hazardo u s locations; and nonhazardo u s locations onl...
Page 6 - Special Conditions for Hazardous Locations Use in Europe
NI 9472/9474 6 ni.com Caution For Zone 2 applications, install a protection device between the V s u p and COM terminals on the NI 9472/9474. The device m u st prevent the inp u t V s u p -to-COM voltage from exceeding 42 V if there is a transient overvoltage condition. Special Conditions for Hazard...
Page 7 - Special Conditions for Marine Applications
© National Instruments Corp. 7 NI 9472/9474 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 certificate, or look for the Lloyd’s Regis...
Page 9 - Sleep Mode
© National Instruments Corp. 9 NI 9472/9474 The NI 9472/9474 with screw terminal has a 10-terminal, detachable screw-terminal connector. The NI 9472 with DSUB has a 25-pin DSUB connector. Each channel of the NI 9472/9474 has a terminal or pin, DO, to which yo u can connect a device. The eight digita...
Page 10 - Specifications
NI 9472/9474 10 ni.com Yo u m u st connect an external power s u pply to the NI 9472/9474. This power s u pply provides the c u rrent for the devices yo u connect to the mod u le. Connect the positive lead of the power s u pply to V s u p and the negative lead of the power s u pply to COM. The V s u...
Page 12 - Increasing Current Drive
NI 9472/9474 12 ni.com Increasing Current Drive Each channel of the NI 9472 has a contin u o u s o u tp u t c u rrent of 0.75 A, and each channel of the NI 9474 has a contin u o u s o u tp u t c u rrent of 1 A. If yo u want to increase the o u tp u t c u rrent to a device, yo u can connect any n u m...
Page 13 - Wiring for High-Vibration Applications
© National Instruments Corp. 13 NI 9472/9474 Wiring for High-Vibration Applications If an application u sing the NI 9472/9474 with screw terminal is s u bject to high vibration, National Instr u ments recommends that yo u either u se ferr u les to terminate wires to the detachable screw-terminal con...
Page 14 - Understanding Short-Circuit-Proof Devices
NI 9472/9474 14 ni.com I/O Protection The NI 9472/9474 is short-circ u it proof in accordance with IEC 1131-2 and provides overc u rrent protection. Understanding Short-Circuit-Proof Devices Each channel on the NI 9472/9474 has circ u itry that protects it from c u rrent s u rges res u lting from sh...
Page 15 - Tip; Power Supplies and Overcurrent Conditions; Detecting an Overcurrent Condition
© National Instruments Corp. 15 NI 9472/9474 more information abo u t the maxim u m contin u o u s o u tp u t c u rrent, short-circ u it behavior, and short-circ u it trip time. Yo u also can refer to the IEC 1131-2 standard for more information abo u t short-circ u it-proof devices. Tip Beca u se t...
Page 16 - Resetting Channels After an Overcurrent Condition
NI 9472/9474 16 ni.com the channel is in an overc u rrent state, meas u re the voltage between DO and V s u p . If the voltage is eq u al to the voltage of the external power s u pply connected to the mod u le, the channel is in an overc u rrent state. Resetting Channels After an Overcurrent Conditi...
Page 17 - Output Characteristics
© National Instruments Corp. 17 NI 9472/9474 Typically, when a system is in sleep mode, yo u cannot comm u nicate with the mod u les. In sleep mode, the system cons u mes minimal power and may dissipate less heat than it does in normal mode. Refer to the Specifications section for more information a...
Page 18 - Current
NI 9472/9474 18 ni.com O u tp u t impedance ( R 0 ) Typical ........................................ 0.07 Ω Maxim u m ................................... 0.13 Ω Contin u o u s o u tp u t c u rrent ( I 0 ), per channel NI 9472....................................... 0.75 A maxNI 9474.....................
Page 20 - Physical Characteristics
NI 9472/9474 20 ni.com Thermal dissipation (at 70 °C) Active mode ............................... 1.5 W maxSleep mode ................................. 55 mW max NI 9474 Power Requirements Power cons u mption from chassis Active mode ............................... 660 mW maxSleep mode ................
Page 21 - Safety
© National Instruments Corp. 21 NI 9472/9474 Ferr u les ............................................. 0.25 mm 2 to 2.5 mm 2 Weight NI 9472/9474 withscrew terminal ............................ 150 g (5.3 oz)NI 9472 with DSUB ................... 145 g (5.1 oz) Safety NI 9472/9474 with Screw Terminal S...
Page 22 - NI 9472 with DSUB Safety Voltages; MAINS
NI 9472/9474 22 ni.com This category refers to local-level electrical distrib u tion, s u ch as that provided by a standard wall o u tlet, for example, 115 V for U.S. or 230 V for E u rope. Caution Do not connect the NI 9472/9474 with screw terminal to signals or u se for meas u rements within Meas ...
Page 23 - Safety Standards
© National Instruments Corp. 23 NI 9472/9474 s u pply system that powers eq u ipment. This category is for meas u rements of voltages from specially protected secondary circ u its. S u ch voltage meas u rements incl u de signal levels, special eq u ipment, limited-energy parts of eq u ipment, circ u...
Page 24 - Hazardous Locations; Gro
NI 9472/9474 24 ni.com Hazardous Locations U.S. (UL) .......................................... Class I, Division 2, Gro u ps A, B, C, D, T4; Class I, Zone 2,AEx nC IIC T4 Canada (C-UL) ................................. Class I, Division 2, Gro u ps A, B, C, D, T4; Class I, Zone 2,Ex nC IIC T4 E u r...
Page 25 - Environmental
© National Instruments Corp. 25 NI 9472/9474 Environmental National Instr u ments C Series mod u les are intended for indoor u se only b u t may be u sed o u tdoors if installed in a s u itable enclos u re. Refer to the man u al for the chassis yo u are u sing for more information abo u t meeting th...
Page 26 - Shock and Vibration; Electromagnetic Compatibility
NI 9472/9474 26 ni.com Shock and Vibration To meet these specifications, yo u m u st panel mo u nt the system. If yo u are u sing the NI 9472/9474 with screw terminal, yo u also m u st either affix ferr u les to the ends of the terminal wires or u se the NI 9932 backshell kit to protect the connecti...
Page 27 - CE Compliance
© National Instruments Corp. 27 NI 9472/9474 Note For EMC compliance, operate this device with shielded cabling. CE Compliance This prod u ct meets the essential req u irements of applicable E u ropean directives, as amended for CE markings, as follows: • 2006/95/EC; Low-Voltage Directive (safety) •...
Page 28 - Environmental Management; NI and the; Waste Electrical and Electronic Equipment (WEEE); EU Customers; must
NI 9472/9474 28 ni.com Environmental Management National Instr u ments is committed to designing and man u fact u ring prod u cts in an environmentally responsible manner. NI recognizes that eliminating certain hazardo u s s u bstances from o u r prod u cts is beneficial not only to the environment ...
Page 29 - Where to Go for Support; ⬉ᄤֵᙃѻક∵ᵻࠊᄣ⧚ࡲ⊩ ˄Ё; RoHS; National Instruments; about China RoHS compliance, go to
© National Instruments Corp. 29 NI 9472/9474 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 to email and pho...
