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OPERATING INSTRUCTIONS AND S PECIFICATIONS NI 9425 32-Channel, 24 V Sinking Digital Input Mo dule ni.com/manuals Deutsch Français.
NI 9425 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 9 425 and incl u des specif ications and pin assignments for the NI 9425. 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 9425 Operating Instructi ons and Specific ations Safety Guidelines Operate the NI 9425 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 9425 Operating I nstruction s and Specificati ons 4 ni.com Caution When mod u le terminals are hazardo u s voltage LIVE (>42.4 V pk /60 VDC), yo u m u st ens u re that devices and circ u its connected to the mod u le are properly ins u lated from h u man contact.
© National Inst ruments Corp. 5 NI 9425 Operating Instructi ons and Specific ations 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 . Caution For Zone 2 applications, connected signals m u st be within the following limit: Capacitance .
NI 9425 Operating I nstruction s and Specificati ons 6 ni.com Special Conditions fo r Marine Appli cations Some mod u les are Lloyd’ s Re gister (LR) T ype Approv ed for marine applications.
© National Inst ruments Corp. 7 NI 9425 Operating Instructi ons and Specific ations Connecting the NI 9425 The NI 9425 has a 37-pin DSUB connector that pro vides connections for 32 sim u ltaneo u sly-sampled digital inp u t channels.
NI 9425 Operating I nstruction s and Specificati ons 8 ni.com Each channel has a DI pin to which yo u can connect a digital inp u t signal. The NI 9425 has fo u r common pins, COM, that are internally connected to the is olated reference of the mod u le.
© National Inst ruments Corp. 9 NI 9425 Operating Instructi ons and Specific ations Figure 2. Connecting a Device to the NI 9425 (Three-Wire Device Shown) The NI 9425 channel re gisters as ON when the so u rcing-o u tp u t de vice applies a voltage or dri ves a c u rrent that is in the inp u t ON range to the DI pin.
NI 9425 Operating I nstruction s and Specificati ons 10 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. 11 NI 9425 Operating Instructi ons and Specific ations Specifications The follo wing spec ific ations are typical for the range – 40 to 70 °C u nless otherwise noted. All v oltages are relat iv e to COM u nless otherwise noted.
NI 9425 Operating I nstruction s and Specificati ons 12 ni.com I/O protection Inp u t v oltage 8 channels ....... ........... .......... 60 VDC ma x 32 channels ....... .............. ..... 30 VDC max Re verse-biased voltage 8 channels ....... .......
© National Inst ruments Corp. 13 NI 9425 Operating Instructi ons and Specific ations MTBF .......... ........... .................. ........ 1,256,699 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 9425 Operating I nstruction s and Specificati ons 14 ni.com Safety Safety Voltages Connect only v oltages that are within the follo wing lim its. Channel-to-COM .. ........... ............ ..... 60 VDC max Isolation Channel-to-channel ... .........
© National Inst ruments Corp. 15 NI 9425 Operating Instructi ons and Specific ations Caution Do not co nnec t the NI 9425 t o sign als or u se for meas u rements within Meas u rement Categories II, III, or IV . Hazardous Locations U.S. (UL) .........
NI 9425 Operating I nstruction s and Specificati ons 16 ni.com Note For UL and other safety certif ications, refer to the prod u ct label or the Online Product Certification section.
© National Inst ruments Corp. 17 NI 9425 Operating Instructi ons and Specific ations CE Compliance This prod u ct meets the essent ial req u irem ents of app licable E u ropean Directi v es as follo .
NI 9425 Operating I nstruction s and Specificati ons 18 ni.com Operating shock (IEC 60068-2-27)........... ........... ........ 30 g, 11 ms half sine, 50 g, 3 ms half sine, 18 shocks at 6 orientations.
© National Inst ruments Corp. 19 NI 9425 Operating Instructi ons and Specific ations Maxim u m altit u de.......... ......... .......... 2,000 m Poll u tion Degree (IEC 60664) .......... 2 Environmental Mana gement NI is committed to designing and man u fact u ring prod u cts in an en vironmentally responsible manner .
NI 9425 Operating I nstructions and Specificati ons 20 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. 21 NI 9425 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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