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OPERATING INSTRUCTIONS AND S PECIFICATIONS NI 9401 8-Channel, TTL Digital Input/Output Mo dule ni.com/manuals Deutsch Français.
NI 9401 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 9 401 and incl u des specif ications and pin assignments for the NI 9401. Vi s i t ni.com/info and enter rd s oftwarever s ion to det ermine which software yo u need for the mod u les yo u are u sing.
© National Inst ruments Corp. 3 NI 9401 Operating Instructi ons and Specific ations Safety Guidelines Operate the NI 9401 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 9401 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 9401 Operating Instructi ons and Specific ations Special Conditions fo r Marine Ap plications Some mod u les are Lloyd’ s Re gister (LR) T ype Approv ed for marine applications. T o verify Llo yd’ s Register cert ification, visit ni.
NI 9401 Operating I nstruction s and Specificati ons 6 ni.com Connecting the NI 9401 The NI 9401 has a 25-pin DSUB connector that pro vides connections for ei ght digital inp u t/o u tp u t channels.
© National Inst ruments Corp. 7 NI 9401 Operating Instructi ons and Specific ations Each channel has a DIO pin to which yo u can connect a digital inp u t or o u tp u t device. The eight DIO ch annels are in ternally referenced to COM, so yo u can u se any of the nine COM lines as a reference for the e xternal signal.
NI 9401 Operating I nstruction s and Specificati ons 8 ni.com Fig u re 2 ill u strates how to connect an SPI de vice to the NI 9401. In this e xample, the thre e channels assigned to o u tp u t signals are on one port and the channel assigned to an inp u t signal is on the other port.
© National Inst ruments Corp. 9 NI 9401 Operating Instructi ons and Specific ations Fig u re 3 ill u strates how to connect se v era l types of digital de vices to the NI 9401.
NI 9401 Operating I nstruction s and Specificati ons 10 ni.com Overcurrent Protection Overc u rrent protection on the NI 9401 allo ws only a specified amo u nt of c u rrent for switching DIO channels or so u rcing the o u tp u t load.
© National Inst ruments Corp. 11 NI 9401 Operating Instructi ons and Specific ations 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.
NI 9401 Operating I nstruction s and Specificati ons 12 ni.com Specifications The follo wing specif ications are typical for the rang e – 40 to 70 °C u nless otherwise noted. All v oltages are relat iv e to COM u nless otherwise noted. Input/Output Characteristics N u mber of channels .
© National Inst ruments Corp. 13 NI 9401 Operating Instructi ons and Specific ations Digital logic le v els Inp u t V oltage .......... ......... ........... ... 5.25 V max High, V IH ....... ......... ........... ... 2 V min Low , V IL ..... .......
NI 9401 Operating I nstruction s and Specificati ons 14 ni.com Maxim u m inp u t signal switching freq u ency b y n u mber of inp u t channels, per channel 8 inp u t channels ... ........... ......... ... 9 MHz 4 inp u t channels ... ........... .....
© National Inst ruments Corp. 15 NI 9401 Operating Instructi ons and Specific ations MTBF .......... ........... .................. ........ 1,244,763 ho u rs at 25 °C; Bellcore Iss u e 2, Method 1, Case 3, Limited P art Stress Method Note Contact NI for Bellcore MTBF specifications at other temperat u res or for MIL-HDBK-21 7F specifications.
NI 9401 Operating I nstruction s and Specificati ons 16 ni.com Safety Maximum Voltage 1 Connect only v oltages that are within the follo wing lim its. Channel-to-COM .. ........... ............ ..... ±30 V max on one channel at a time, Meas u rement Category I Isolation Voltages Channel-to-channel .
© National Inst ruments Corp. 17 NI 9401 Operating Instructi ons and Specific ations s u pply system that powers eq u ipment. This cate gory is for meas u rements of voltages from spec ially protecte d secondary circ u its.
NI 9401 Operating I nstruction s and Specificati ons 18 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) ............ .......
© National Inst ruments Corp. 19 NI 9401 Operating Instructi ons and Specific ations Operating h u midity (IEC 60068-2-56)....... ........... ............ 10 to 90% RH, noncondensing Storage h u midity (IEC 60068-2-56)....... ........... ............
NI 9401 Operating I nstruction s and Specificati ons 20 ni.com Electromagnetic Compatibility This prod u ct is designed to meet the req u ire ments of the follo wing standards of EMC for electrical eq.
© National Inst ruments Corp. 21 NI 9401 Operating Instructi ons and Specific ations 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.
NI 9401 Operating I nstructions and Specifications 22 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. 23 NI 9401 Operating Instructions and Specific ations telephone s u pport o u tside the United Stat es, contact yo u r local branch off ice: A u stralia 1800 300 800, A .
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