National Instruments NI 9882 Getting Started Manual Download Page 9 | Manualshive

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National Instruments NI 9882 Getting Started Manual Download Page 9

Figure 1.

CAN Bus Topology and Termination Resistor Locations

CAN

Node

CAN

Node

CAN

Node

Rt

Rt

CAN

Node

CAN_H

CAN_L

CAN_H

CAN_L

CAN_H

CAN_L

CAN_H

CAN_L

Bus Cable Length

Stub

Length

Connecting a CAN Bus to the NI 9882

You can connect the NI 9882 port to any location on a CAN bus.
Figure 2 shows one example of connecting the NI 9882 directly
to one CAN node.

NI 9882 Getting Started Guide

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© National Instruments

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Summary of Contents for NI 9882

Page 1: ...GETTING STARTED GUIDE NI 9882 1 Port DeviceNet Module...

Page 2: ...guidelines in this document are specific to the NI 9882 The other components in the system might not meet the same safety ratings Refer to the documentation for each component in the system to determi...

Page 3: ...only Follow these guidelines if you are installing the NI 9882 in a potentially explosive environment Not following these guidelines may result in serious injury or death Caution Do not disconnect I O...

Page 4: ...etween the CAN signals and the NI 9882 CAN pins The device must prevent the CAN Port to COM voltage from exceeding 55 V if there is a transient overvoltage condition Special Conditions for Hazardous L...

Page 5: ...system shall be mounted in an ATEX IECEx certified enclosure with a minimum ingress protection rating of at least IP54 as defined in IEC EN 60079 15 Caution The enclosure must have a door or cover acc...

Page 6: ...performance in a noisy environment Caution You must use a UL listed ITE power supply marked LPS with the NI 9882 The NI 9882 requires an external power supply of 9 to 30 V to operate Supply power to t...

Page 7: ...5 1 No Connection NC 2 CAN_L 3 COM 4 NC 5 SHLD 6 COM 7 CAN_H 8 NC 9 VSUP CAN Bus Topology and Termination A CAN bus consists of two or more CAN nodes cabled together The CAN_H and CAN_L pins of each n...

Page 8: ...e communication errors Because the CAN bus is bidirectional both ends of the cable must be terminated However this requirement does not mean that every node on the bus should have a termination resist...

Page 9: ...AN_H CAN_L CAN_H CAN_L CAN_H CAN_L CAN_H CAN_L Bus Cable Length Stub Length Connecting a CAN Bus to the NI 9882 You can connect the NI 9882 port to any location on a CAN bus Figure 2 shows one example...

Page 10: ...p COM Rt SHLD CAN_H CAN_L Vsup COM Cabling Requirements for the NI 9882 Cable Specifications Cables should meet the physical medium requirements specified in ISO 11898 shown in the following table Bel...

Page 11: ...95 min 120 nominal 140 max Length related resistance 70 m m nominal Specific line delay 5 ns m nominal Termination Resistors The termination resistors Rt should match the nominal impedance of the CAN...

Page 12: ...allowable cable length You can find detailed cable length recommendations in the ISO 11898 CiA DS 102 and DeviceNet specifications ISO 11898 specifies 40 m total cable length with a maximum stub leng...

Page 13: ...pecifications The NI 9882 electrical characteristics allow at least 110 CAN ports on a network NI 9882 Hardware Overview The NI 9882 has one full featured CAN port that is isolated from the other modu...

Page 14: ...CAN_H CAN_L CAN Transceiver Rx Tx COM Vsup _ NI 9882 Specifications The following specifications are typical for the range 40 C to 70 C unless otherwise noted High Speed CAN Characteristics Transceiv...

Page 15: ...MTBF Contact NI for Bellcore MTBF or MIL HDBK 217F specifications Power Requirements Power consumption from chassis Active mode 1 W max Sleep mode 2 55 mW max Thermal dissipation at 70 C Active mode 1...

Page 16: ...oltage1 Port to COM 27 to 40 VDC max Measurement Category I Isolation Port to earth ground Continuous 60 VDC Measurement Category I Withstand 500 Vrms verified by a 5 s dielectric withstand test 1 The...

Page 17: ...ipment circuits powered by regulated low voltage sources and electronics Caution Do not connect the NI 9882 to signals or use for measurements within Measurement Categories II III or IV Safety and Haz...

Page 18: ...2 Groups A B C D T4 Class I Zone 2 Ex nA IIC T4 Europe DEMKO Ex nA IIC T4 Gc Electromagnetic Compatibility This product meets the requirements of the following EMC standards for sensitive electrical...

Page 19: ...ets the essential requirements of applicable European Directives as follows 2014 35 EU Low Voltage Directive safety 2014 30 EU Electromagnetic Compatibility Directive EMC 94 9 EC Potentially Explosive...

Page 20: ...Vibration To meet these specifications you must panel mount the system Operating vibration Random IEC 60068 2 64 5 grms 10 Hz to 500 Hz Sinusoidal IEC 60068 2 6 5 g 10 Hz to 500 Hz Operating shock IE...

Page 21: ...2 1 IEC 60068 2 2 40 C to 70 C Storage temperature IEC 60068 2 1 IEC 60068 2 2 40 C to 85 C Ingress protection IP40 Operating humidity IEC 60068 2 78 10 RH to 90 RH noncondensing Storage humidity IEC...

Page 22: ...vironmental Impact web page at ni com environment This page contains the environmental regulations and directives with which NI complies as well as other environmental information not included in this...

Page 23: ...u have access to everything from troubleshooting and application development self help resources to email and phone assistance from NI Application Engineers Visit ni com services for NI Factory Instal...

Page 24: ...certificate for your product at ni com calibration NI corporate headquarters is located at 11500 North Mopac Expressway Austin Texas 78759 3504 NI also has offices located around the world For teleph...

Page 25: ...arty legal notices in the readme file for your NI product Refer to the Export Compliance Information at ni com legal export compliance for the NI global trade compliance policy and how to obtain relev...

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