NI TRC-8546 Manual de usuario
TRC-8546
Getting Started
2022-06-30
Contents
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Guidelines for Hazardous Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electromagnetic Compatibility Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Mounting the TRC-8546. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Panel Mounting the TRC-8546. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Wiring to the TRC-8546. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Cable Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Cable Lengths. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Number of LIN Nodes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Termination Resistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
TRC-8546 Hardware Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Inserting and Removing the TRC-8546. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
TRC-8546 LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TRC-8546 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
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TRC-8546 Getting Started
Overview
This document explains how to connect the TRC-8546.
Note Before you begin, complete the soware and hardware installation
procedures in your chassis documentation.
Note The guidelines in this document are specific to the TRC-8546. 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
Caution Observe all instructions and cautions in the user documentation.
Using the product in a manner not specified can damage the product and
compromise the built-in safety protection.
Attention Suivez toutes les instructions et respectez toutes les mises
en garde de la documentation d'utilisation. L'utilisation du produit de
© National Instruments 3
TRC-8546 Getting Started
toute autre façon que celle spécifiée risque de l'endommager et de
compromettre la protection de sécurité intégrée.
Safety Guidelines for Hazardous Locations
The TRC-8546 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 Gc and Ex nA IIC T4 hazardous locations; and
nonhazardous locations only. Follow these guidelines if you are installing the
TRC-8546 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 o or the area is known to be nonhazardous.
Caution Do not unplug the TRC-8546 unless power has been switched o
or the area is known to be nonhazardous.
Caution Substitution of components may impair suitability for Class I,
Division 2, or Zone 2.
Caution The system must be installed in an enclosure certified for the
intended hazardous (classified) location, having a tool secured cover/door,
where a minimum protection of at least IP54 is provided.
Caution For Zone 2 applications, install a protection device between the
LIN bus and the TRC-8546LIN pins. The device must prevent the LIN Port-
to-COM voltage from exceeding 55 V if there is a transient overvoltage
condition.
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TRC-8546 Getting Started
Special Conditions for Hazardous Locations Use in Europe and
Internationally
The TRC-8546 has been evaluated as Ex nA IIC T4 Gc equipment under DEMKO 12
ATEX 1202658X and is IECEx UL 14.0089X certified. Each TRC-8546 is marked II 3G
and is suitable for use in Zone 2 hazardous locations, in ambient temperatures of
-40 °C ≤ Ta ≤ 70 °C.
Caution Transient protection shall be provided that is set at a level not
exceeding 140% of the peak rated voltage value of 85 V at the supply
terminals to the equipment.
Caution The system shall only be used in an area of not more than
Pollution Degree 2, as defined in IEC/EN 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.
Electromagnetic Compatibility Guidelines
This product was tested and complies with the regulatory requirements and limits
for electromagnetic compatibility (EMC) stated in the product specifications. These
requirements and limits provide reasonable protection against harmful interference
when the product is operated in the intended operational electromagnetic
environment.
This product is intended for use in industrial locations. However, harmful
interference may occur in some installations, when the product is connected to a
peripheral device or test object, or if the product is used in residential or
commercial areas. To minimize interference with radio and television reception and
© National Instruments 5
TRC-8546 Getting Started
prevent unacceptable performance degradation, install and use this product in strict
accordance with the instructions in the product documentation.
Furthermore, any changes or modifications to the product not expressly approved
by National Instruments could void your authority to operate it under your local
regulatory rules.
Notice To ensure the specified EMC performance, operate this product
only with shielded cables and accessories. Do not use unshielded cables or
accessories unless they are installed in a shielded enclosure with properly
designed and shielded input/output ports and connected to the product
using a shielded cable. If unshielded cables or accessories are not properly
installed and shielded, the EMC specifications for the product are no
longer guaranteed.
Mounting the TRC-8546
Caution The TRC-8546 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 aect the system ambient temperature
and/or the measurement accuracy of modules in the system.
Caution To meet thermal management requirements, do not zip tie more
than six cables in a bundle, and allow for air flow around the bundle. If
used with a cRIO or cDAQ chassis, mount all cables at least 152 mm
(6.0 in.) from the chassis and do not mount more than six cables directly
beneath the chassis.
You can route and strain relieve the TRC-8546 similarly to ordinary cables. You also
can panel mount it using its removable jackscrews, zip tie, or screw mount it. The
screw mounting holes support #6 and M3 screws spaced 35.56 mm (1.400 in.)
center-to-center, with minimum length of 23 mm (7/8 in.). The TRC-8546 supports
zip ties up to 5.33 mm (0.210 in.) wide.
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TRC-8546 Getting Started
The following figure shows jackscrews, zip tie mounting slots, and screw mounting
holes on the TRC-8546.
Figure 1. TRC-8546 Mounting Features
Panel Mounting the TRC-8546
The recommended panel mounting cutout dimensions are shown below.
Figure 2. Recommended Cutout Dimensions
The jackscrews included with the TRC-8546 work with panel thicknesses up to
2.21 mm (0.087 in.).
Caution Tighten the jackscrews to a maximum torque of 0.56 N · m
(5.0 lb · in.).
If your panel is thicker than 2.21 mm (0.087 in.), you can mill out a recessed pocket
for the TRC-8546. The following figure shows the recommended pocket dimensions
and cutout position.
Figure 3. Recommended Pocket Dimensions
Wiring to the TRC-8546
The TRC-8546 is used with an NI-XNET interface host port.
© National Instruments 7
TRC-8546 Getting Started
Figure 4. TRC-8546 Connections
The TRC-8546 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 TRC-8546 shielding to the
connector on the host port end. The shielding does not electrically connect to the
COM signals.
Caution When connecting the D-Sub connector shell, do not exceed the
maximum jackscrew torque of 0.56 N · m (5.0 lb · in.).
The TRC-8546 receives power from the NI-XNET host port but also requires an
external power supply of +8 V to +18 V to operate. Supply power to the TRC-8546
VSUP pin from the LIN bus.
The TRC-8546 pinout is listed in the following table.
Table 2. Pin Assignments for the TRC-8546
Connector Pin Signal Name
1 No Connection (NC)
2 NC
3 COM
4 NC
5 NC
6 COM
7 LIN
8 NC
9 VSUP
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TRC-8546 Getting Started
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.
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 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 VSUP.
On NI-XNET LIN products, master termination is soware selectable; you can enable
it in the API with the NI-XNET Session Interface:LIN:Termination property.
TRC-8546 Hardware Overview
The TRC-8546 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 standard and supports baud rates up to 20 kbps.
Figure 5. TRC-8546 Hardware Overview
© National Instruments 9
TRC-8546 Getting Started
Inserting and Removing the TRC-8546
The TRC-8546 connects to a host device with an active latching connector. To
connect the TRC-8546 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 TRC-8546, push the lock ejector forward to
disengage the latch and simultaneously pull the TRC-8546, as shown in the
following figure.
Figure 6. Inserting and Removing the TRC-8546
TRC-8546 LEDs
The TRC-8546 includes two LEDs per port to help you monitor hardware and bus
status. LED 1 primarily indicates whether the hardware is currently in use. LED 2
primarily indicates the activity information of the connected bus. Each LED can
display two colors (red or green), which display in the following four patterns:
Table 2. LED Pattern Definitions
Pattern Meaning
O No LED illumination
Solid LED fully illuminated
Blink Blinks at a constant rate of several times per second
Activity Blinks in a pseudo-random pattern
Table 3. LED Pattern Indications
Condition/State LED 1 LED 2
Port identification Blinks green Blinks green
NI-XNET catastrophic error Blinks red Blinks red
No open session on hardware O O
Open session on hardware, port is properly powered,
and hardware is not communicating
Solid green O
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TRC-8546 Getting Started
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