Instruction/ maintenance manual of the product NI 9853 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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An important point after buying a device National Instruments NI 9853 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought National Instruments NI 9853 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data National Instruments NI 9853 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, National Instruments NI 9853 you will learn all the available features of the product, as well as information on its operation. The information that you get National Instruments NI 9853 will certainly help you make a decision on the purchase.
If you already are a holder of National Instruments NI 9853, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime National Instruments NI 9853.
However, one of the most important roles played by the user manual is to help in solving problems with National Instruments NI 9853. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device National Instruments NI 9853 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
