National Instruments Network Card NI 9853 User Manual

OPERATING INSTRUCTIONS  
NI 9853  
2-Port, High-Speed CAN Module  
 
Safety Guidelines for Hazardous Locations  
The NI 9853 is suitable for use in Class I, Division 2, Groups A, B,  
C, D, T4 hazardous locations; Class I, Zone 2, AEx nA II T4 and  
Ex nA II T4 hazardous locations; and nonhazardous locations only.  
Follow these guidelines if you are installing the NI 9853 in a  
potentially explosive environment. Not following these guidelines  
may result in serious injury 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  
switched off or the area is known to be nonhazardous.  
Caution Substitution of components may impair  
suitability for Class I, Division 2.  
Caution For Zone 2 applications, install the  
CompactRIO system in an enclosure rated to at least  
IP 54 as defined by IEC 60529 and EN 60529.  
© National Instruments Corp.  
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NI 9853 Operating Instructions  
 
Caution For Zone 2 applications, install a protection  
device between the CAN signals and the NI 9853 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 Safe Use in Europe  
This equipment has been evaluated as EEx nA II T4 equipment  
under DEMKO Certificate No. 03 ATEX 0324020X. Each module  
is marked  
locations.  
II 3G and is suitable for use in Zone 2 hazardous  
Wiring the NI 9853  
The NI 9853 has two 9-pin male D-Sub connectors that provide  
connections to a CAN bus. Each port on the NI 9853 has pins for  
CAN_H and CAN_L, to which you connect the CAN bus signals.  
These signals should be connected using twisted-pair cable.  
Each port has two common pins (COM) that are internally  
connected to the isolated reference of the module and serve as the  
reference ground for CAN_H and CAN_L. You can connect the  
CAN bus reference ground (sometimes referred to as CAN_V–) to  
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one or both of the COM pins. Each port also has an optional shield  
pin, SHLD, that can be connected to a shielded CAN cable.  
Connecting SHLD may improve signal integrity and EMC  
performance in a noisy environment.  
CAN0 of the NI 9853 is internally powered, and therefore requires  
no external power supply. CAN1 requires an external power supply  
of +8 to +25 V to operate. Supply power to the VSUP pin of CAN1  
from the CAN bus.  
Note Although CAN0 of the NI 9853 does not require an  
external power supply to operate, it can be connected to a  
powered CAN bus without being damaged.  
Pinouts for CAN0 and CAN1 of the NI 9853 are listed in Table 1  
and Table 2.  
Table 4 lists recommended termination resistor values.  
© National Instruments Corp.  
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NI 9853 Operating Instructions  
 
Table 1. Pin Assignments for CAN0  
Connector  
Pin  
Signal  
1
2
3
4
5
6
7
8
9
No Connection (NC)  
CAN_L  
COM  
NC  
1
2
3
4
5
6
7
8
9
SHLD  
COM  
CAN_H  
NC  
NC  
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Table 2. Pin Assignments for CAN1  
Connector  
Pin  
Signal  
1
2
3
4
5
6
7
8
9
No Connection (NC)  
CAN_L  
COM  
NC  
1
2
3
4
5
6
7
8
9
SHLD  
COM  
CAN_H  
NC  
VSUP  
© National Instruments Corp.  
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NI 9853 Operating Instructions  
 
 
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  
main CAN bus cable through a short connection known as a “stub.”  
The pair of signal wires, CAN_H and CAN_L constitutes a  
transmission line. If the transmission line is not terminated,  
each signal change on the bus causes reflections that may cause  
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  
resistor—only the nodes at the end of the cable should have  
termination resistors.  
Figure 1 shows a simplified diagram of a CAN bus with multiple  
CAN nodes, and proper termination resistor (Rt) locations.  
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Bus Cable Length  
CAN_H  
CAN_H  
CAN  
Node  
CAN  
Node  
R
R
t
t
CAN_L  
CAN_L  
Stub  
Length  
CAN  
CAN  
Node  
Node  
Figure 1. CAN Bus Topology and Termination Resistor Locations  
© National Instruments Corp.  
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NI 9853 Operating Instructions  
 
 
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 example of the connection of CAN0  
of the NI 9853 directly to one CAN node, and CAN1 directly to  
another CAN node. CAN1 requires an external power supply on  
the CAN bus.  
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(SHLD)  
CAN_H  
(SHLD)  
CAN_H  
CAN  
Cable  
R
R
t
t
CAN0  
(With  
CAN_L  
CAN_L  
Optional  
Shield)  
V
V
sup  
sup  
COM  
COM  
NI 9853  
(SHLD)  
CAN_H  
(SHLD)  
CAN_H  
CAN  
Cable  
R
R
t
t
CAN1  
(With  
CAN_L  
CAN_L  
Optional  
Shield)  
+
V
V
sup  
sup  
COM  
COM  
External  
Power  
Supply  
Figure 2. Connecting Both Ports of the NI 9853 to CAN Buses  
© National Instruments Corp.  
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NI 9853 Operating Instructions  
 
 
Cabling Requirements for NI 9853  
This section deals with cabling specifications, termination  
resistors, cable lengths, and the number of CAN nodes that can  
exist in a system.  
Cable Specifications  
Cables should meet the physical medium requirements specified in  
ISO 11898, shown in Table 3. Belden cable (3084A) meets all of  
those requirements, and should be suitable for most applications.  
Table 3. ISO 11898 Specifications for Characteristics of a CAN_H and  
CAN_L Pair of Wires  
Characteristic  
Value  
Impedance  
95 Ω minimum, 120 Ω nominal, 140 Ω maximum  
70 mΩ/m nominal  
Length-related  
resistance  
Specific line delay  
5 ns/m nominal  
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Termination Resistors  
The termination resistors (Rt) should match the nominal  
impedance of the CAN cable, and therefore comply with the values  
in Table 4.  
Table 4. Termination Resistor Specification  
Characteristic  
Value  
Condition  
Termination resistor, Rt  
100 Ω min,  
Minimum power  
dissipation: 220 mW  
120 Ω nominal,  
130 Ω max  
Cable Lengths  
The allowable cable length is affected by the characteristics of the  
cabling and the desired bit transmission rates. Detailed cable length  
recommendations can be found 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/s. The ISO 11898  
specification says that significantly longer cable lengths may be  
allowed at lower bit rates, but each node should be analyzed for  
signal integrity problems.  
© National Instruments Corp.  
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NI 9853 Operating Instructions  
 
 
Number of CAN Nodes  
The maximum number of nodes depends on the electrical  
characteristics of the nodes on the network. If all of the nodes meet  
the requirements of ISO 11898, at least 30 nodes may be connected  
to the bus. Higher numbers of nodes may be connected if the  
electrical characteristics of the nodes do not degrade signal quality  
below ISO 11898 signal level specifications.  
The electrical characteristics of the NI 9853 allow at least  
110 CAN ports on a network.  
NI 9853 Hardware Overview  
The NI 9853 has two full-featured, independent CAN ports that are  
isolated from each other, and from the other modules in the system.  
Each port of the NI 9853 has a Philips SJA1000 CAN controller  
that is CAN 2.0B-compatible and fully supports both 11-bit  
and 29-bit identifiers. Each port also has a Philips TJA1041  
High-Speed CAN transceiver that is fully compatible with the  
ISO 11898 standard and supports baud rates up to 1 Mbps.  
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+5 V  
GND  
+5 V_ISO  
Iso Pwr  
COM  
CAN_H  
CAN_L  
Rx  
Tx  
Rx  
Tx  
CAN  
Transceiver  
CAN  
Controller  
CAN0  
V
sup  
+
Ext Pwr  
Supply  
+5 V  
Reg  
_
COM  
CAN_H  
CAN_L  
Rx  
Tx  
Rx  
Tx  
CAN  
Transceiver  
CAN  
Controller  
CAN1  
Figure 3. NI 9853 Hardware Overview  
© National Instruments Corp.  
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NI 9853 Operating Instructions  
 
Sleep Mode (CompactRIO Only)  
You can enable sleep mode for the CompactRIO system in  
software. In sleep mode, the system consumes less power and may  
dissipate less heat. Typically, when a system is in sleep mode, you  
cannot communicate with the modules. Refer to the Specifications  
section for more information about power consumption and  
thermal dissipation.  
This system sleep mode should not be confused with the NI 9853  
Transceiver Mode Sleep property, which sets only the CAN port to  
sleep mode. Refer to the FPGA Module topic in LabVIEW Help for  
more information on the Transceiver Mode property.  
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Specifications  
The following specifications are typical for the range –40 to 70 °C  
unless otherwise noted.  
High-Speed CAN Characteristics  
Transceiver........................................Philips TJA1041  
Max baud rate ...................................1 Mbps  
CAN_H, CAN_L bus lines  
voltage...............................................27 to +40 VDC  
Supply voltage range (VSUP  
)
CAN0 .........................................N/A  
CAN1 .........................................+8 to +25 VDC  
MTBF ...............................................1,816,913 hours at 25 °C;  
Bellcore Issue 6, Method 1,  
Case 3, Limited Part Stress  
Method  
Note Contact NI for Bellcore MTBF specifications at  
other temperatures or for MIL-HDBK-217F  
specifications.  
© National Instruments Corp.  
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NI 9853 Operating Instructions  
 
 
Power Requirements  
Power consumption from chassis  
Active mode  
Transmitting.........................625 mW max  
Receiving .............................400 mW max  
Sleep mode .................................25 μW max  
Thermal dissipation (at 70 °C)  
Active mode ...............................1 W max  
Sleep mode .................................250 mW max  
Physical Characteristics  
If you need to clean the module, wipe it with a dry towel.  
Weight...............................................Approx. 144 g (5.0 oz)  
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Safety  
Maximum Voltage1  
Connect only voltages that are within these limits.  
Port-to-COM.....................................27 to +40 VDC max,  
Measurement Category I  
Measurement Category I is for measurements performed on  
circuits not directly connected to the electrical distribution system  
referred to as MAINS voltage. MAINS is a hazardous live electrical  
supply system that powers equipment. This category is for  
measurements of voltages from specially protected secondary  
circuits. Such voltage measurements include signal levels, special  
equipment, limited-energy parts of equipment, circuits powered by  
regulated low-voltage sources, and electronics.  
Caution Do not connect to signals or use for  
measurements within Measurement Categories II, III,  
or IV.  
1
The maximum voltage that can be applied or output between any port or VSUP  
terminal and a COM terminal without creating a safety hazard.  
© National Instruments Corp.  
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NI 9853 Operating Instructions  
 
Isolation Voltages  
Port-to-port  
Withstand....................................500 Vrms, verified by a  
dielectric withstand test, 5 s  
Continuous .................................60 VDC,  
Measurement Category I  
Port-to-earth ground  
Withstand....................................500 Vrms, verified by a  
dielectric withstand test, 5 s  
Continuous .................................60 VDC,  
Measurement Category I  
Safety Standards  
The NI 9853 is designed to meet the requirements of the following  
standards of safety for electrical equipment for measurement,  
control, and laboratory use:  
IEC 61010-1, EN 61010-1  
UL 61010-1, CSA 61010-1  
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Note For UL and other safety certifications, refer to the  
product label, or visit ni.com/certification, search  
by model number or product line, and click the  
appropriate link in the Certification column.  
Hazardous Locations  
U.S. (UL) ..........................................Class I, Division 2,  
Groups A, B, C, D, T4;  
Class I, Zone 2,  
AEx nA II T4  
Canada (C-UL) .................................Class I, Division 2,  
Groups A, B, C, D, T4;  
Class I, Zone 2,  
Ex nA II T4  
Europe (DEMKO).............................EEx nA II T4  
© National Instruments Corp.  
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NI 9853 Operating Instructions  
 
Environmental  
CompactRIO modules are intended for indoor use only. For  
outdoor use, mount the CompactRIO system in a suitably rated  
enclosure. Refer to the installation instructions for the chassis you  
are using for more information about meeting these specifications.  
Operating temperature ......................40 to 70 °C  
Storage temperature..........................40 to 85 °C  
Ingress protection..............................IP 40  
Operating humidity...........................10 to 90% RH,  
noncondensing  
Storage humidity...............................5 to 95% RH,  
noncondensing  
Maximum altitude.............................2,000 m  
Pollution Degree (IEC 60664)..........2  
Shock and Vibration  
To meet these specifications, you must panel mount the  
CompactRIO system.  
Operating vibration,  
random (IEC 60068-2-64) ................5 grms, 10 to 500 Hz  
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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) ..............5 g, 10 to 500 Hz  
Electromagnetic Compatibility  
This product is designed to meet the requirements of the following  
standards of EMC for electical equipment for measurement,  
control, and laboratory use:  
EN 61326 EMC requirements; Minimum Immunity  
EN 55011 Emissions; Group 1, Class A  
CE, C-Tick, ICES, and FCC Part 15 Emissions; Class A  
Note For EMC compliance, operate this device with  
shielded cabling.  
© National Instruments Corp.  
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NI 9853 Operating Instructions  
 
CE Compliance  
This product meets the essential requirements of applicable  
European Directives, as amended for CE marking, as follows:  
2006/95/EC; Low-Voltage Directive (safety)  
2004/108/EC; Electromagnetic Compatibility Directive  
(EMC)  
Note Refer to the Declaration of Conformity (DoC) for  
this product for any additional regulatory compliance  
information. To obtain the DoC for this product, visit  
ni.com/certification, search by model number or  
product line, and click the appropriate link in the  
Certification column.  
Environmental Management  
National Instruments is committed to designing and manufacturing  
products in an environmentally responsible manner. NI recognizes  
that eliminating certain hazardous substances from our products is  
beneficial not only to the environment but also to NI customers.  
NI 9853 Operating Instructions  
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For additional environmental information, refer to the NI and the  
Environment 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 document.  
Waste Electrical and Electronic Equipment (WEEE)  
EU Customers At the end of their life cycle, all products  
must be sent to a WEEE recycling center. For more  
information about WEEE recycling centers and National  
Instruments WEEE initiatives, visit ni.com/  
environment/weee.htm.  
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NI 9853 Operating Instructions  
 
National Instruments Contact Information  
National Instruments corporate headquarters is located at  
11500 North Mopac Expressway, Austin, Texas, 78759-3504.  
National Instruments also has offices located around the world to  
help address your support needs. For telephone support in the  
United States, create your service request at ni.com/support  
and follow the calling instructions or dial 512 795 8248. For  
telephone support outside the United States, contact your local  
branch office:  
Australia 1800 300 800, Austria 43 662 457990-0,  
Belgium 32 (0) 2 757 0020, Brazil 55 11 3262 3599,  
Canada 800 433 3488, China 86 21 5050 9800,  
Czech Republic 420 224 235 774, Denmark 45 45 76 26 00,  
Finland 358 (0) 9 725 72511, France 01 57 66 24 24,  
Germany 49 89 7413130, India 91 80 41190000,  
Israel 972 3 6393737, Italy 39 02 41309277, Japan 0120-527196,  
Korea 82 02 3451 3400, Lebanon 961 (0) 1 33 28 28,  
Malaysia 1800 887710, Mexico 01 800 010 0793,  
Netherlands 31 (0) 348 433 466, New Zealand 0800 553 322,  
Norway 47 (0) 66 90 76 60, Poland 48 22 3390150,  
Portugal 351 210 311 210, Russia 7 495 783 6851,  
Singapore 1800 226 5886, Slovenia 386 3 425 42 00,  
NI 9853 Operating Instructions  
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South Africa 27 0 11 805 8197, Spain 34 91 640 0085,  
Sweden 46 (0) 8 587 895 00, Switzerland 41 56 2005151,  
Taiwan 886 02 2377 2222, Thailand 662 278 6777,  
Turkey 90 212 279 3031, United Kingdom 44 (0) 1635 523545  
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NI 9853 Operating Instructions  
 
National Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation. Refer to the  
Terms of Use section on ni.com/legalfor more information about National Instruments trademarks. Other  
product and company names mentioned herein are trademarks or trade names of their respective companies. For  
patents covering National Instruments products, refer to the appropriate location: Help»Patents in your software,  
the patents.txtfile on your media, or ni.com/patents.  
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