Manuel d'utilisation / d'entretien du produit 8-Channel, 24 V Logic, Sinking Digital Input Device du fabricant National Instruments
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USER GUIDE AND SPECIFICATIONS NI USB-9421 8-Channel, 24 V Logic, Si nking Digital Input Device This user guide describes how to use the National Instruments USB-9421 and lists the de vice specifications. In th is user guide, the NI USB-9421 with screw terminal and the NI USB-94 21 with D-SUB are referred to inclusi vely as the NI USB-9421 .
NI USB-9421 U ser Guide and Specifications 2 ni.com Dimensions Figures 2 and 3 sho w the NI USB-9421 device dimensions. Figure 2. NI USB-9421 (Screw T erminal) Device in Millimeters (Inches) Figure 3. NI USB-9421 (D-SUB) Device in Millimeters (Inches) Hi- S peed U S B Carrier NI U S B-9162 140.
© National Instruments Corporation 3 NI USB-9421 User Guid e and Specifications Safety Guidelines Operate the NI USB-9421 on ly as described in thes e operating instructions.
NI USB-9421 U ser Guide and Specifications 4 ni.com Related Documentation Each application software package an d driv er includes inform ation about writing applications for taking measur ements and controlling measurement devices. The follo wing references to documents assume you have NI-D A Qmx 8.
© National Instruments Corporation 5 NI USB-9421 User Guid e and Specifications • T aking Measurements —Contains the conceptual and how-to information you need to acquire and analyze measurement data in LabVIEW , including common measurements, measurement fundamentals, NI-DA Qmx key concepts, and device considerations.
NI USB-9421 U ser Guide and Specifications 6 ni.com ANSI C without NI Application Software The NI-D A Qmx Help contains API ov erviews and general information about measurement concepts. Select Start»All Programs»National Instruments»NI-D A Q»NI-DA Qmx Help .
© National Instruments Corporation 7 NI USB-9421 User Guid e and Specifications T raining Courses If you need more help getting started developing an appli cation with NI products, NI offers training courses. To enroll in a course or obtain a detailed course outline, r efer to ni.
NI USB-9421 U ser Guide and Specifications 8 ni.com 3. Align the I/O module with the carrier , as sho wn in Figure 4. Figure 4. Module Installation 4. Squeeze the latches and insert the NI 9421 module into the NI USB-9162 carrier .
© National Instruments Corporation 9 NI USB-9421 User Guid e and Specifications Mounting the NI USB-9421 to a Panel Threaded inserts are located in the NI USB-9421 for mounting it to a panel.
NI USB-9421 U ser Guide and Specifications 10 ni.com Wiring the NI USB-9421 Device Caution A high v oltage screw terminal backshell must be installed when using hazardous voltages (>42.4 V pk , 60 VDC). Note T able 2 illustrates the accessories a v ailable from ni.
© National Instruments Corporation 11 NI USB-9421 User Gu id e and Specifications Each channel of the NI USB-9421 has a terminal or pin, DI, to which you can connect voltage or current signals. The NI USB-9421 also has a common terminal or pin, COM, that is internally connected to the isolated reference of the module.
NI USB-9421 U ser Guide and Specifications 12 ni.com Figure 7. Pin Assignments Connecting Devices to the NI USB-9421 The NI USB-9421 has sinking inputs , meaning that when current goes through or voltage is applied to the DI termi nal or pin, DI provides a path to ground for the current or voltage.
© National Instruments Corporation 13 NI USB-9421 User Gu id e and Specifications Figure 8. Connecting a Device to the NI USB-9421 (3-Wire Device Shown) The NI USB-9421 channel registers as ON when the sourcing-output device applies a v oltage or dri ves a cu rrent to DI that is in the input ON range.
NI USB-9421 U ser Guide and Specifications 14 ni.com Figure 10. Assembled High Voltage Screw T erminal Back shell Specifications The following specifications are ty pical for the range 0 to 60 °C unless otherwise noted. All voltage s are relative to COM unless otherwise no ted.
© National Instruments Corporation 15 NI USB-9421 User Gu id e and Specifications Bus Interface USB specification ..... .............. ............... USB 2.0 Hi-Speed Physical Characteristics Dimensions With screw terminal . .............. .........
NI USB-9421 U ser Guide and Specifications 16 ni.com NI USB-9421 with D-SUB Safety Voltages Channel-to-COM .......... ........... .............. .30 V max Isolation Channel-to-channel.............. ........ ....No isolation betw een channels Channel-to-earth g round Withstand .
© National Instruments Corporation 17 NI USB-9421 User Gu id e and Specifications Operating humidity (IEC 60068-2-56) ................. ......... ......... 10 to 90% RH, noncondensing Storage humidity (IEC 60068-2-56) ................. ......... ....
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Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté National Instruments 8-Channel, 24 V Logic, Sinking Digital Input Device c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du National Instruments 8-Channel, 24 V Logic, Sinking Digital Input Device - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation National Instruments 8-Channel, 24 V Logic, Sinking Digital Input Device, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le National Instruments 8-Channel, 24 V Logic, Sinking Digital Input Device va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le National Instruments 8-Channel, 24 V Logic, Sinking Digital Input Device, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du National Instruments 8-Channel, 24 V Logic, Sinking Digital Input Device.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le National Instruments 8-Channel, 24 V Logic, Sinking Digital Input Device. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei National Instruments 8-Channel, 24 V Logic, Sinking Digital Input Device ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
