National Instruments NI 9881 Getting Started Manual Download Page 12 | Manualshive

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National Instruments NI 9881 Getting Started Manual Download Page 12

Table 2.

ISO 11898 Specifications for Characteristics of a CAN_H and

CAN_L Pair of Wires

Characteristic

Value

Impedance

95 Ω min,

120 Ω nominal,

140 Ω max

Length-related resistance

70 mΩ/m nominal

Specific line delay

5 ns/m nominal

Termination Resistors

The termination resistors (Rt) should match the nominal
impedance of the CAN cable and therefore comply with the
values in the following table.

NI 9881 Getting Started Guide

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Summary of Contents for NI 9881

Page 1: ...derutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In s...

Page 2: ...ocument explains how to connect to the NI 9881 The NI 9881 module requires the latest NI CANopen software to be installed The latest version of the NI CANopen software is at ni com downloads hnology G...

Page 3: ...to determine the safety and EMC ratings for the entire system Safety Guidelines Operate the NI 9881 only as described in this document Caution Do not operate the NI 9881 in a manner not specified in t...

Page 4: ...jury or death Caution Do not disconnect I O side wires or connectors unless power has been switched off or the area is known to be nonhazardous Caution Do not remove modules unless power has been swit...

Page 5: ...ge condition Special Conditions for Hazardous Locations Use in Europe and Internationally The NI 9881 has been evaluated as Ex nA IIC T4 Gc equipment under DEMKO Certificate No 07 ATEX 0626664X and is...

Page 6: ...79 15 Caution The enclosure must have a door or cover accessible only by the use of a tool Wiring the NI 9881 The NI 9881 has one 9 pin male D Sub connector that provides connections to a CAN bus The...

Page 7: ...d LPS with the NI 9881 The NI 9881 requires an external power supply of 9 to 30 V to operate Supply power to the NI 9881 VSUP pin Note Power on VSUP is required for CANopen operation The NI 9881 pinou...

Page 8: ...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 node are connected to the NI 9881 G...

Page 9: ...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 resistor only the two nodes at the far e...

Page 10: ...CAN_H CAN_L Bus Cable Length Stub Length Connecting a CAN Bus to the NI 9881 You can connect the NI 9881 port to any location on a CAN bus Figure 2 shows one example of connecting the NI 9881 directl...

Page 11: ...Cabling Requirements for the NI 9881 Cable Specifications Cables should meet the physical medium requirements specified in ISO 11898 shown in the following table Belden cable 3084A meets all these re...

Page 12: ...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 cable and therefore comply with th...

Page 13: ...nd 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 length of 0 3 m for a bit rate of 1 Mb...

Page 14: ...cal characteristics allow at least 110 CAN ports on a network NI 9881 Hardware Overview The NI 9881 has one full featured CAN port that is isolated from the other modules in the system The port has a...

Page 15: ...x COM Vsup _ NI 9881 Specifications The following specifications are typical for the range 40 C to 70 C unless otherwise noted High Speed CAN Characteristics Transceiver NXP PCA82C251T Max baud rate 1...

Page 16: ...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 25 W max Sleep mode 250 mW max NI...

Page 17: ...ax 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 maximum voltage that can be appli...

Page 18: ...levels special equipment limited energy parts of equipment circuits powered by regulated low voltage sources and electronics Caution Do not connect the NI 9881 to signals or use for measurements with...

Page 19: ...10 1 EN 61010 1 UL 61010 1 CSA 61010 1 EN 60079 0 2012 EN 60079 15 2010 IEC 60079 0 Ed 6 IEC 60079 15 Ed 4 UL 60079 0 Ed 5 UL 60079 15 Ed 3 CSA 60079 0 2011 CSA 60079 15 2012 Note For UL and other saf...

Page 20: ...01 Class A emissions Note In the United States per FCC 47 CFR Class A equipment is intended for use in commercial light industrial and heavy industrial locations In Europe Canada Australia and New Zea...

Page 21: ...2014 30 EU Electromagnetic Compatibility Directive EMC 94 9 EC Potentially Explosive Atmospheres ATEX Online Product Certification Refer to the product Declaration of Conformity DoC for additional reg...

Page 22: ...1 ms half sine 50 g 3 ms half sine 18 shocks at 6 orientations Environmental Refer to the manual for the chassis you are using for more information about meeting these specifications Operating tempera...

Page 23: ...responsible manner NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers For additional environmental information refer to...

Page 24: ...environment weee RoHS National Instruments RoHS National Instruments RoHS ni com environment rohs_china For information about China RoHS compliance go to ni com environment rohs_china Worldwide Suppo...

Page 25: ...g the manufacturer s declaration of conformity This system affords the user protection for electromagnetic compatibility EMC and product safety You can obtain the DoC for your product by visiting ni c...

Page 26: ...on of ni com niglobal to access the branch office websites which provide up to date contact information support phone numbers email addresses and current events NI 9881 Getting Started Guide National...

Page 27: ...ile 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 relevant HTS codes ECCNs and other impo...

Page 28: ...uipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentat...

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