National Instruments NI 9866 User manual

GETTING STARTED GUIDE
NI 9866
1-Port, LIN Module
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This document explains how to connect to the NI 9866.
The NI 9866 module requires the latest software to be installed.
The latest version of the software is at ni.com/downloads.
Note Before you begin, complete the software and
hardware installation procedures in your chassis
documentation.
Note The guidelines in this document are specific to
the NI 9866. The other components in the system might
not meet the same safety ratings. Refer to the
documentation for each component in the system to
determine the safety and EMC ratings for the entire
system.
Safety Guidelines
Operate the NI 9866 only as described in this document.
Hot Surface This icon denotes that the component
may be hot. Touching this component may result in
bodily injury.
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Caution Do not operate the NI 9866 in a manner not
specified in this document. Product misuse can result in
a hazard. You can compromise the safety protection
built into the product if the product is damaged in any
way. If the product is damaged, return it to NI for
repair.
Safety Guidelines for Hazardous Locations
The NI 9866 is suitable for use in Class I, Division 2, Groups A,
B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC T4
and Ex nA IIC T4 hazardous locations; and nonhazardous
locations only. Follow these guidelines if you are installing the
NI 9866 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.
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Caution Substitution of components may impair
suitability for Class I, Division 2.
Caution For Division 2 and Zone 2 applications,
install the system in an enclosure rated to at least IP54
as defined by IEC/EN 60079-15.
Caution For Zone 2 applications, install a protection
device between the LIN signals and the NI 9866 LIN
pins. The device must prevent the LIN Port-to-COM
voltage from exceeding 55 V if there is a transient
overvoltage condition.
Special Conditions for Hazardous Locations Use in
Europe and Internationally
The NI 9866 has been evaluated as Ex nA IIC T4 Gc equipment
under DEMKO Certificate No. 07 ATEX 0626664X and is
IECEx 14.0089X certified. Each NI 9866 is marked II 3G and
is suitable for use in Zone 2 hazardous locations, in ambient
temperatures of -40 °C ≤ Ta ≤ 70 °C. If you are using the NI 9866
in Gas Group IIC hazardous locations, you must use the device in
an NI chassis that has been evaluated as Ex nC IIC T4, Ex IIC
T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.
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Caution You must make sure that transient
disturbances do not exceed 140% of the rated voltage.
Caution The system shall only be used in an area of
not more than Pollution Degree 2, as defined in
IEC 60664-1.
Caution The 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
accessible only by the use of a tool.
Wiring the NI 9866
The NI 9866 has one 9-pin male D-Sub connector that provides
connections to a LIN bus.
The port has two common pins (COM) that are internally
connected to the module’s isolated reference and serve as the
reference ground for LIN signal. You can connect the LIN bus
reference ground to one or both COM pins. The port also has an
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optional shield pin, SHLD, that you can connect to a shielded
LIN cable. Connecting SHLD may improve signal integrity and
EMC performance in a noisy environment.
Caution You must use a UL listed ITE power supply
marked LPS with the NI 9866.
The NI 9866 requires an external power supply of +8 to +18 V to
operate. Supply power to the NI 9866 VSUP pin from the LIN
bus.
Note Power on VSUP is required for LIN operation.
The NI 9866 pinout is listed in Table 1.
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Table 1. Pin Assignments for the NI 9866
Connector Pin Signal Name
6
7
8
9
1
2
3
4
5
1 No Connection (NC)
2 NC
3 COM
4 NC
5 SHLD
6 COM
7 LIN
8 NC
9 VSUP
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Cabling Requirements for the NI 9866
This section deals with cabling specifications, termination
resistors, cable lengths, and the number of LIN nodes that can
exist in a system.
Cable Specifications
LIN cables should meet the physical medium requirement of a
bus RC time constant of 5 µs. For detailed formulas for
calculating this value, refer to the Line Characteristics section of
the LIN specification. Belden cable (3084A) and other
unterminated CAN/Serial quality cables meet these requirements
and should be suitable for most applications.
Cable Lengths
The maximum allowable cable length is 40 m, per the LIN
specification.
Number of LIN Devices
The maximum number of devices on a LIN bus is 16, per the LIN
specification.
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Termination Resistors
LIN cables require no termination, as nodes are terminated at the
transceiver. Slave nodes typically are pulled up from the LIN bus
to VBat with a 30 kΩ resistance and a serial diode. This
termination usually is integrated into the transceiver package.
The master node requires a 1 kΩ resistor and serial diode
between the LIN bus and VBat. On NI-XNET LIN products,
master termination is software selectable; you can enable it in the
API with the NI-XNET Session Interface:LIN:Termination
property.
NI 9866 Hardware Overview
The NI 9866 has one full-featured LIN port that is isolated from
the other modules in the system. The port has a LIN controller
that is fully compliant with the LIN 1.3/2.0/2.1/2.2 Specification.
The port also has an NXP TJA1028 LIN transceiver that is fully
compatible with the LIN 1.3/2.0/2.1/2.2 and SAE J2602 standard
and supports baud rates up to 20 kbps.
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Figure 1. NI 9866 Hardware Overview
Ext Pwr
Supply
Required
Rx
Tx
LIN
Controller LIN
LIN
Transceiver
Rx
Tx
COM
Vsup
+
_
NI 9866 Specifications
The following specifications are typical for the range -40 °C to
70 °C unless otherwise noted.
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