NI 9866 Bedienungsanleitung

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OPERATING INSTRUCTIONS

NI 9866

1-Port, LIN Module

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NI 9866 Operating Instructions 2 ni.com

These operating instructions describe how to use the National

Instruments (NI) 9866 module. For information about installing,

configuring, and programming your system, refer to your system

documentation. The NI 9866 module requires the latest NI-XNET

software to be installed. The latest version of the NI-XNET

software is at ni.com/downloads.

Note The safety guidelines and specifications in this

document are specific to the NI 9866. The other

components in your system may not meet the same safety

ratings and specifications. Refer to the documentation for

each component in your system to determine the safety

ratings and specifications for the entire system.

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Safety Guidelines

Caution Do not operate the NI 9866 in a manner not

specified in the user manual or operating instructions.

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 National Instruments for repair.

Hot Surface This icon denotes that the component may be

hot. Touching this component may result in bodily injury.

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.

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NI 9866 Operating Instructions 4 ni.com

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.

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 Safe Use in Europe

This equipment has been evaluated as Ex nA IIC T4 equipment

under DEMKO Certificate No. 07 ATEX 0626664X. Each module

is marked II 3G and is suitable for use in Zone 2 hazardous

locations.

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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

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.

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NI 9866 Operating Instructions 6 ni.com

The NI 9866 pinout is listed in Table 1.

Table 1. Pin Assignments for the NI 9866

Connector Pin Signal

1No Connection (NC)

2NC

3COM

4NC

5SHLD

6COM

7LIN

8NC

9 VSUP

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Cabling Requirements for 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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NI 9866 Operating Instructions 8 ni.com

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 kΩresistance and a serial diode. This

termination usually is integrated into the transceiver package. The

master node requires a 1 kΩresistor 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

Specifications

The following specifications are typical for the range –40 to 70 °C

unless otherwise noted.

LIN Characteristics

Transceiver........................................ NXP TJA1028

Max baud rate ................................... 20 kbps

LIN bus lines voltage........................ –40 to +40 VDC

Ext Pwr

Supply

Required

LIN

Controller LIN

LIN

Transceiver

COM

Vsup

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