National Instruments NI-XNET LIN Bedienungsanleitung

OPERATING INSTRUCTIONS

NI-XNET LIN Transceiver

Cable

2|ni.com |NI-XNET LIN Transceiver Cable Operating Instructions

These operating instructions describe how to use the NI-XNET

LIN Transceiver Cable. For information about installing,

configuring, and programming your system, refer to your system

documentation. The transceiver cable 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-XNET LIN Transceiver

Cable. 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.

Safety Guidelines

Operate the NI-XNET LIN Transceiver Cable only as described in

these operating instructions.

Hot Surface This icon denotes that the component may

be hot. Touching this component may result in bodily

injury.

NI-XNET LIN Transceiver Cable Operating Instructions |© National Instruments |3

Caution Do not operate the NI-XNET LIN Transceiver

Cable in a manner not specified in these 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.

Safety Guidelines for Hazardous Locations

The NI-XNET LIN Transceiver Cable 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-XNET LIN Transceiver Cable in a potentially

explosive environment. Not following these guidelines may result

in serious injury or death.

Caution Do not disconnect bus-side connector unless

power has been switched off or the area is known to be

nonhazardous.

4|ni.com |NI-XNET LIN Transceiver Cable Operating Instructions

Caution Do not unplug transceiver cable 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 Division 2 and Zone 2 applications, install

the system in an enclosure rated to at least IP 54 as

defined by IEC 60529 and EN 60529.

Caution For Division 2 and Zone 2 applications, install

a protection device between the LIN bus and the

NI-XNET LIN Transceiver Cable 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 12 ATEX Number (1202658X). Each

transceiver cable is marked II 3G and is suitable for use in

Zone 2 hazardous locations.

NI-XNET LIN Transceiver Cable Operating Instructions |© National Instruments |5

Caution You must make sure that transient disturbances

do not exceed 140% of the rated voltage.

Caution The system shall be mounted in an ATEX

certified enclosure with a minimum ingress protection rating

of at least IP54 as defined in IEC/EN 60529 and used in an

environment of not more than Pollution Degree 2.

Caution The enclosure must have a door or cover

accessible only by the use of a tool.

Mounting the NI-XNET LIN Transceiver Cable

Caution The NI-XNET LIN Transceiver Cable is a

thermally active device that dissipates heat.

Refer to the user manual of the host this device directly

connects to for specific information regarding thermal

management. Not following mounting requirements may

affect the system ambient temperature and/or the

measurement accuracy of modules in the system.

6|ni.com |NI-XNET LIN Transceiver Cable Operating Instructions

The Transceiver Cable is intended to be routed and strain relieved

similar to other cables, and does not require a special mounting

accessory.

Wiring to the NI-XNET LIN Transceiver Cable

The NI-XNET LIN Transceiver Cable is used with a compatible

NI-XNET Transceiver Cable host port.

Figure 1. NI-XNET LIN Transceiver Cable Connections

The NI-XNET LIN Transceiver Cable 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 transceiver cable’s isolated reference and serve as

the reference ground for the LIN signal. You can connect the LIN

bus reference ground to one or both COM pins.

The D-Sub connector shell connects through the NI-XNET LIN

Transceiver Cable shielding to the connector on the host port end.

The shielding does not electrically connect to the COM signals.

To LIN Bus

To Transceiver

Cable Host

NATIONAL

INSTRUMENTS

NI-XNET LIN Transceiver Cable Operating Instructions |© National Instruments |7

The NI-XNET LIN Transceiver Cable gets power from the XNET

host port but also requires an external power supply of +8 to +18 V

to operate. Supply power to the NI-XNET LIN Transceiver Cable

Vsup pin from the LIN bus.

The NI-XNET LIN Transceiver Cable pinout is listed in Table 1.

Table 1. Pin Assignments for the NI-XNET LIN Transceiver Cable

Connector Pin Signal

1No Connection (NC)

2NC

3COM

4NC

5NC

6COM

7LIN

8NC

9Vsup

8|ni.com |NI-XNET LIN Transceiver Cable Operating Instructions

Cabling Requirements to the NI-XNET LIN

Transceiver Cable

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 Nodes

The maximum number of devices on a LIN bus is 16, per the LIN

specification.

NI-XNET LIN Transceiver Cable Operating Instructions |© National Instruments |9

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 Vsup 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 Vsup. 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-XNET LIN Transceiver Cable Hardware

Overview

The NI-XNET LIN Transceiver Cable has one full-featured LIN

port that is isolated from the host it is plugged into. The port has an

NXP TJA1028 LIN transceiver that is fully compatible with the

LIN 1.3/2.0/2.1/2.2 and SAE J2602 standards and supports baud

rates up to 20 kbps.

10 |ni.com |NI-XNET LIN Transceiver Cable Operating Instructions

Figure 2. NI-XNET LIN Transceiver Cable Hardware Overview

Inserting and Removing the NI-XNET LIN

Transceiver Cable

The NI-XNET LIN Transceiver Cable connects to a host device

with an active latching connector. To connect the NI-XNET LIN

Transceiver Cable to a host device, push the connector assembly

into the host receptacle until the internal latch snaps into position.

The latch emits an audible click when engaged. To remove the

NI-XNET LIN Transceiver Cable, push the lock ejector forward to

disengage the latch and simultaneously pull the NI-XNET LIN

Transceiver Cable, as shown in Figure 3.

Transceiver

Isolation

Barrier

To LIN Bus

To Transceiver

Cable Host

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