National Instruments 9756 Manual de usuario

USER MANUAL

NI 9756

NI Powertrain Controls USB NOx Sensor Module Kit

Contents

Introduction .............................................................................................................................. 1

System Diagram ....................................................................................................................... 2

Hardware .................................................................................................................................. 2

Powering the Hardware ............................................................................................................ 3

Wiring Harness ......................................................................................................................... 5

Introduction

The National Instruments 9756 USB NOx Sensor Module Kit interfaces with NOxand O2

exhaust gas sensors.

Features

• Configurable for one or two channels

• Measures NOx(ppm) and O2(%) concentrations

• Sensor controller supply voltage of 12 V to 16 V (24 V version available)

• Reverse battery protection on sensor controller module

2|ni.com |NI 9756 User Manual

• Sensor controller harness

• Stand-alone executable that can run without a LabVIEW license

• Windows-based LabVIEW VIs

System Diagram

Figure 1. NI 9756 System

Hardware

The NI 9756 includes the following hardware:

• Continental UniNOx Smart NOx Sensor with an integrated sensor controller module

• Sensor bung

• Wiring harness

• NI USB-8473 USB High-Speed CAN module

The wiring harness in the NI 9756 connects to the NOx Sensor Control Module and splits into

two cables for the NI USB-8473 module and an external power supply. The first cable connects

to the NI USB-8473 with a female DB-9 connector. A terminating resistor of approximately

120 Ωis located inside this cable near the NOx Sensor Control Module and between the CAN

High and CAN Low wires. The second cable provides three non-terminated leads for connecting

to a power supply, which requires two leads, and for address selection of the NOx sensor module,

which requires one lead.

Refer to the NI USB-8473 CAN Hardware and Software Manual for more information about

cabling requirements.

Note You must use the sensor included in the NI 9756 kit. NI does not support other

sensors.

NI USB-8473

Sensor

Control Module(s)

Optional Second Sensor

DC Power

Supply 12V

NI 9756 User Manual |© National Instruments |3

Powering the Hardware

The NI 9756 requires power from a range of 12 V to 16 V with a continuous current of 1.5 A

and a peak current of 16 A. The maximum power requirement is 20 W, which typically occurs

when the heating element is being turned on from a cold state. If you are using two sensors,

double the capacity of the power supply.

Refer to the NI USB-8473 Hardware and Software Manual for more information on power

requirements.

Contact National Instruments for more information about sensor specifications.

NOx Sensor Light-Off Times

Conditions

Air T ......................................................... 25 ±5 °C

BattV......................................................... 14 V

Heater........................................................ ON

NOx .................................................................. <100 s

O2...................................................................... <80 s

NOx Sensor Preheating Function

When power is supplied to the sensor, the sensor enters preheating mode automatically until the

Sensor Enable Boolean is set to TRUE within the supporting software. The Sensor Enable

Boolean turns the internal sensor heater to its ON state. If the Sensor Enable Boolean is set to

FALSE, the sensor returns to preheating mode. The preheating mode protects the sensor from

mechanical cracks caused by water splash.

NOx Sensor Operating Temperature Ranges

Sensor Module Controller Temperature ........... -40 °C to 105 °C

(105 °C to 115 °C for a maximum of 10 minutes)

Storage temperature range ................................ -40 °C to 120 °C

Maximum storage time..................................... 2 years

Maximum exhaust gas temperature.................. 800 °C (950 °C for a maximum of 100 hours)

Maximum sensor hexagon

screw temperature............................................. 620 °C (650 °C for a maximum of 100 hours)

Maximum sensor grommet temperature........... 200 °C (230 °C for a maximum of 100 hours)

Preheating sensor temperature range................ 80 °C to 120 °C

Lifespan approved by life cycle pattern ........... 2,000 hours or 120 K miles

4|ni.com |NI 9756 User Manual

NOx Sensor Electrical Characteristics

NOx Sensor Supply Voltage

Minimum supply voltage ..................................12 V

Maximum supply voltage .................................16 V

NOx Sensor Supply Current

Average supply current .....................................1.5A

Peak supply current at switch on ......................16 A

Supply Power

Maximum supply power ...................................20 W

NOx Sensor Miscellaneous

Thread torque ....................................................50 N · m (36.88 lb · ft)

Lubrication........................................................Anti-seize compound

Figure 2. Installation Position

Figure 3. Tilt Angle in Gas Flow Direction

0°

+80°

Exhaust Gas Pipe

To p

–80°

D/E

90°

–10° +10°

376105C-01 Aug16

Refer to the NI Trademarks and Logo Guidelines at ni.com/trademarks for more information on NI trademarks. Other product and company

names mentioned herein are trademarks or trade names of their respective companies. For patents covering NI products/technology, refer to the

appropriate location: Help»Patents in your software, the patents.txt file on your media, or the National Instruments Patents Notice at

ni.com/patents. You can find information about end-user license agreements (EULAs) and third-party legal notices in the readme file for your

NI product. Refer to the Export Compliance Information at ni.com/legal/export-compliance for the NI global trade compliance policy

and how to obtain relevant HTS codes, ECCNs, and other import/export data. NI MAKES NO EXPRESS OR IMPLIED WARRANTIES AS TO THE

ACCURACY OF THE INFORMATION CONTAINED HEREIN AND SHALL NOT BE LIABLE FOR ANY ERRORS. U.S. Government Customers: The data

contained in this manual was developed at private expense and is subject to the applicable limited rights and restricted data rights as set forth in

FAR 52.227-14, DFAR 252.227-7014, and DFAR 252.227-7015.

NOx Sensor Controller Module Connector

Type of connector .............................................Hirschmann MLK 872-860-501

Number of pins .................................................5

Connector pin assignment

Pin 1 ..........................................................Battery [red]

Pin 2 ..........................................................Ground [black]

Pin 3 ..........................................................CAN Low [blue]

Pin 4 ..........................................................CAN High [orange]

Pin 5 ..........................................................Address Switch [purple]

Pulling Pin 5 to ground changes the CAN transmit ID of the Sensor Control Module so that

two NOx Sensor Control Modules can be added to the same network. Sensor Control Modules

with Pin 5 floating are Ch. 1 and Sensor Control Modules with Pin 5 grounded are Ch. 2.

Wiring Harness

Figure 4. 2-Sensor Harness

NI-CAN

Device

Sensor

Control Module

12 V DC

Power Supply

Sensor

Control Module

Sensor 1

Sensor 2

1. Batt

2. Gnd

3. CAN-Low

4. CAN-High

1. Batt

2. Gnd

3. CAN-Low

4. CAN-High

CAN-Low .2

CAN-High .7

CAN-Gnd .6

Batt .9

5. Add. Sw

Batt

Gnd

Add. Sw

• Each leg from the junction is4 ft

• Batt and Gnd wiresare 18 AWG, CAN wiresare 20 AWG

• 120 Ωresistorsacross CAN-Low and CAN-High near sensor 1 and 2

• NI-CAN devicesconnect to the harness through afemale DB-9 connector

• CAN-Ground isconnected to Ground near junction

• Add. Sw should be connected to ground at the power supply

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