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USER MANUAL
NI 9752
NI Powertrain Controls Automotive AD Combo Module
Contents
Introduction .............................................................................................................................. 2
Pinout........................................................................................................................................ 3
Hardware .................................................................................................................................. 3
Powering the Module................................................................................................................ 3
Platform Compatibility ............................................................................................................. 4
Analog Inputs ........................................................................................................................... 4
VR Sensor Inputs...................................................................................................................... 7
Hall-Effect Sensor Inputs ......................................................................................................... 9
Standard Circuit Configuration ................................................................................................ 10
Custom Configuration .............................................................................................................. 12
Physical Specifications and Characteristics ............................................................................. 12
Compliance and Certifications ................................................................................................. 12
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Summary of Contents for National Instruments NI 9752
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Page 1: Table Of Contents
USER MANUAL NI 9752 NI Powertrain Controls Automotive AD Combo Module Contents Introduction ..........................2 Pinout............................3 Hardware ..........................3 Powering the Module........................ 3 Platform Compatibility ......................4 Analog Inputs ........................... 4 VR Sensor Inputs........................7 Hall-Effect Sensor Inputs ......................9 Standard Circuit Configuration .................... -
Page 2: Introduction
Introduction The National Instruments 9752 CompactRIO AD Combo Module includes automotive-style analog and digital inputs to interface with standard automotive sensors. Features • 21 Ch. Analog inputs – 12-bit A/D Converter – 4 ksps per channel – Manually configurable, optional pull-up, pull-down, and divide resistors –... -
Page 3: Pinout
Figure 1. Pin Assignments NI 9752 Hardware In addition to the listed analog and digital inputs, the NI 9752 provides sensor power and ground. The cRIO chassis backplane directly provides sensor power. Ensure that sensors do not draw more than a total of 100 mA. -
Page 4: Platform Compatibility
All analog inputs are single-ended inputs similar to production automotive ECU analog inputs and provide filtering and over/under voltage protection. For best results, the NI 9752 must provide the power and ground of the sensors. The standard channel configuration provides an NI-recommended pull-up or pull-down for every input to facilitate open/defective sensor faults. - Page 5 Figure 3 shows the analog input circuit configuration for measuring voltages from 0 V to 33 V. This is standard configuration for Channels 1 through 3 in the NI 9752. Channels with this configuration are protected from voltage swings of ±50 V.
- Page 6 Figure 4 shows the analog input circuit configuration for both active-drive analog sensors and potentiometers for measuring voltages from 0 V to 5 V. This is the standard configuration for Channels 4 through 16 in the NI 9752. Channels with this configuration are protected from voltage swings of ±30 V.
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Page 7: Vr Sensor Inputs
Figure 5. Analog Input Configuration for Thermistors and Switches VR Sensor Inputs The NI 9752 provides two identical VR sensor inputs. A VR sensor input is a standard, low-cost, electromagnetic sensing device that contains a winding of wire around a permanent magnetic core. - Page 8 GND pins on the NI 9752. The polarity of the sensor connection to the NI 9752 is critical. Connect the leads of the sensor so that the positive input of the VR circuit receives the waveform shown in Figure 8. The waveform shown Figure 9 is incorrect, and the VR circuit does not properly respond to this waveform.
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Page 9: Hall-Effect Sensor Inputs
NI. Hall-Effect Sensor Inputs The NI 9752 includes two identical Hall-effect sensor input circuits. The Hall-effect inputs take a digital input from a Hall-effect or proximity sensor. Typical sensors include an open-collector output that requires a pull-up resistor at the collector. The Hall-effect inputs read active TTL compatible signals. -
Page 10: Standard Circuit Configuration
Figure 11 shows the standard configuration of the Hall-effect sensor input circuits. Figure 11. Hall-Effect Circuit Input Configuration Standard Circuit Configuration The NI 9752 comes with a standard configuration as illustrated in Table 1 below. Table 1. Standard Analog Configuration Pull-up... - Page 11 Resistor Resistor Resistor Frequency Intended Use 4.7 kΩ open 0 Ω 150 kHz Hall, Proximity, Switch or TTL 4.7 kΩ open 0 Ω 150 kHz Hall, Proximity, Switch or TTL NI 9752 User Manual | © National Instruments | 11...
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Page 12: Custom Configuration
Do not exceed the 60VDC rating. 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. - Page 13 NI product. Refer to the Export Compliance Information at ni.com/legal/export-compliance for the National Instruments global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/export data. © 2013 National Instruments. All rights reserved.
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