Manuale d’uso / di manutenzione del prodotto NI 9853 del fabbricante National Instruments
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OPERATING INSTRUCTIONS NI 9853 2-Port, High-Speed CAN Module.
NI 9853 Operating Instructions 2 ni.com These operating instructions desc ribe ho w to use the Natio nal Instruments (NI) 9853 module. F o r information about installing, configuring, and programming your system, refer to your system documentation. The NI 9853 module requires the NI 9853 software to be installed.
© National Instruments Corp. 3 NI 9853 Operating Instructions Safety Guidelines fo r Hazardous Loca tions The NI 9853 is suitable for use in Cl ass I, Division 2, Groups A, B, C, D, T4 hazardous locations; Clas s I, Zone 2, AEx nA II T4 and Ex nA II T4 hazardous locations ; and nonhazardous locations only .
NI 9853 Operating Instructions 4 ni.com Caution For Zone 2 applications, install a protection device between the CAN signals and the NI 9853 CAN pins. The de vice must pre v ent the CAN Port-to-COM voltage from e xceeding 55 V if there is a transient ov ervoltage condition.
© National Instruments Corp. 5 NI 9853 Operating Instructions one or both of the COM pins. Each port also has an o ptional shield pin, SHLD, that can be connect ed to a shielded CAN cable. Connecting SHLD may impro ve signa l integrity and EMC performance in a noisy en vironment.
NI 9853 Operating Instructions 6 ni.com Table 1. Pin Assignments for CAN0 Connector Pin Signal 1 No Connection (NC) 2 CAN_L 3 COM 4 NC 5 SHLD 6 COM 7 CAN_H 8 NC 9 NC 6 7 8 9 1 2 3 4 5.
© National Instruments Corp. 7 NI 9853 Operating Instructions Table 2. Pin Assignments for CAN1 Connector Pin Signal 1 No Connection (NC) 2 CAN_L 3 COM 4 NC 5 SHLD 6 COM 7 CAN_H 8 NC 9 V SUP 6 7 8 9 .
NI 9853 Operating Instructions 8 ni.com CAN Bus T opology and T e rmination A CAN bus consists of two or more CAN nodes cabled together . The CAN_H and CAN_L pins of each node are connected to the main CAN bus cable through a short con nection kno wn as a “stub .
© National Instruments Corp. 9 NI 9853 Operating Instructions Figure 1. CAN Bus T opology and T ermination Resistor Locati ons CAN Node CAN Node CAN Node R t R t CAN Node CAN_H CAN_L CAN_H CAN_L CAN_.
NI 9853 Operating Instructions 10 ni.com Connecting a CAN Bus to the NI 9853 Each port of the NI 9853 can be connected to any location on a CAN bus. Figure 2 shows one exam ple of the con nection of CAN0 of the NI 9853 directly to one C AN node, and CAN1 directly to another CAN node.
© National Instruments Corp. 11 NI 9853 Operating Instructions Figure 2. Connecting Both Ports of th e NI 9853 to CAN Buses CAN1 CAN Device CAN0 NI 9853 R t CAN Cable (With Optional Shield) (SHLD) CA.
NI 9853 Operating Instructions 12 ni.com Cabling Requirements for NI 9853 This section deals wi th cabling specif icatio ns, termination resistors, cable lengths, and the number of CAN nodes that can exist in a system. Cable Specifications Cables should meet th e physical medium re quirements specified in ISO 11898, sho wn in T able 3.
© National Instruments Corp. 13 NI 9853 Operating Instructions T ermination Resistors The termination resistors (R t ) should match the nominal impedance of the CAN cable, and therefore comply wit h the v alues in T able 4.
NI 9853 Operating Instructions 14 ni.com Number of CAN Nodes The maximum number of nodes depends on the electrical characteristics of the nodes on the ne twor k. If all of the nodes meet the requirements of ISO 11898, at least 30 nodes may be connected to the bus.
© National Instruments Corp. 15 NI 9853 Operating Instructions Figure 3. NI 9853 Hardware Overview Rx Tx CAN T r ansceiver +5 V_ISO +5 V GND COM CAN_H CAN_L +5 V Reg Rx Tx Ext Pwr Supply CAN Controll.
NI 9853 Operating Instructions 16 ni.com Sleep Mode (CompactRIO Only) Y ou can enable sleep mode fo r the CompactRIO system in software. In sleep mode, the syst em consumes less power and may dissipate less heat. T ypically , when a system is in sleep mode, you cannot communicate with th e modules.
© National Instruments Corp. 17 NI 9853 Operating Instructions Specifications The follo wing spec ificat ions are typical for the range – 40 to 70 °C unless otherwise noted. High-Speed CAN Characteristics T ransceiv er .......... ........... .....
NI 9853 Operating Instructions 18 ni.com Power Requirements Power consumption from chassis Activ e mode T ransmitting ............. ............ 625 mW max Receiving ........ ........... .......... 400 mW max Sleep mode . ......... ........... .......
© National Instruments Corp. 19 NI 9853 Operating Instructions Safety Maximum Voltage 1 Connect only v oltages that are wi thin these limits. Port-to-COM .
NI 9853 Operating Instructions 20 ni.com Isolation Voltages Port-to-port W ithstand .......... ............ ......... ..... 500 V rms , ver ifie d by a dielectric withstand test, 5 s Continuous .......... ......... ........... ... 60 VDC, Measurement Category I Port-to-earth ground W ithstand .
© National Instruments Corp. 21 NI 9853 Operating Instructions Note For UL and other safety certif ications, refer to the product label, or vi sit ni.com/certification , search by model number or pro duct line, and click the appropriate link in the Certification column.
NI 9853 Operating Instructions 22 ni.com Environmental CompactRIO mod ules are inte nded for indoor u se only . F or outdoor use, mount the CompactRIO system in a suitably rated enclosure. Refer to the installa tion instructions for the chassis you are using for more information a bout meeting these specif ications.
© National Instruments Corp. 23 NI 9853 Operating Instructions Operating shock (IEC 60068-2-27)........... ........... ........ 30 g, 11 ms half sine, 50 g, 3 ms half sine, 18 shocks at 6 orientations Operating vibration, sinusoidal (IEC 60068-2-6) .
NI 9853 Operating Instructions 24 ni.com CE Compliance This product meets the essentia l requirements of applicable European Directi ves, as amended for CE marking, as follo ws: • 2006/95/EC; Low-V .
© National Instruments Corp. 25 NI 9853 Operating Instructions For additional en vironmental information, refer to the NI and the Environment W eb page at ni.com/environment . This page contains the en vironmental regulat ions and directi v es with which NI complies, as well as othe r en vironmental information not included in this document.
NI 9853 Operating Instructions 26 ni.com National Instruments Contact Information National Instruments corporate headquarters is located at 11500 North Mopac Expressway , Austin, T exas, 78759-3504. National Instruments also has of fi ces located around the world to help address your support needs.
© National Instruments Corp. 27 NI 9853 Operating Instructions South Africa 27 0 11 805 8197, Spain 34 91 640 0085, Sweden 46 (0) 8 587 895 00, Switzerland 41 56 2005151, T aiwan 886 02 2377 2222, Th.
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Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il National Instruments NI 9853 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del National Instruments NI 9853 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso National Instruments NI 9853 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul National Instruments NI 9853 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il National Instruments NI 9853, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del National Instruments NI 9853.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il National Instruments NI 9853. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo National Instruments NI 9853 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
