National Instruments 9753 User manual

USER MANUAL
NI 9753
NI Powertrain Controls Differential Digital I/O Module
Contents
Introduction .............................................................................................................................. 2
Pinout........................................................................................................................................ 2
Hardware .................................................................................................................................. 3
Powering the Module................................................................................................................ 3
Platform Compatibility ............................................................................................................. 4
Inputs and Outputs.................................................................................................................... 5
Compliance and Certifications ................................................................................................. 5
Output Characteristics .............................................................................................................. 7
Input Characteristics ................................................................................................................. 7
Physical Specifications and Characteristics ............................................................................. 7

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Introduction
The National Instruments 9753 Differential Digital I/O Module includes a CompactRIO (cRIO)
module with eight individually controlled inputs or outputs with 50 ns resolution. When the
channels are configured as outputs, the channels can be controlled by a customized Boolean
logic or by specialized fuel and spark VIs included with the NI 9753, in which case, an Engine
Position Tracking (EPT) VI is also required.The NI 9753 fuel and spark VIs provide control
similar to that of NI’s fuel and spark driver module kits. The NI 9753 outputs do not drive current
sufficient for driving fuel injectors or ignition coils. The outputs can be used for commands to
external custom driver circuits or smart actuators with built-in driver circuits. Multiple fuel and
spark VIs can be wired together through OR logic gates to deliver multi-pulse
engine-synchronous commands to a single output. When the channels are configured as inputs,
the Boolean signals from these channels can be used as general purpose Boolean Trigger signals
within the LabVIEW FPGA application.
Each I/O channel uses an RS485/422 compatible differential transceiver with a voltage range of
0 V to 5 V.
Features
• 8-channel differential digital I/O with RS485/422 compatible transceivers
• Individual channel direction selection
• Protected 5 V, 1 A supply output
• 50 ns input and output resolution
Pinout
Figure 1. NI 9753 Pin Assignments

NI 9753 User Manual |© National Instruments |3
Hardware
The NI 9753 has eight channels of RS485/422 compatible differential digital inputs or outputs
in a NI CompactRIO module form factor and provides a 5 V sensor power output and ground.
NI recommends using the NI 9923 Connector Kit for connections to the NI 9753. The NI 9923
provides proper strain relief for NI 9753 connections. Visit ni.com/info and enter Info Code
DIFFIO for more information on parts and accessories for the NI 9753.
Powering the Module
The NI 9753 requires power from two different sources, the CompactRIO backplane male high
density D-SUB 15-pin (HD15) connector and the external DB-37 connector.
The HD15 connector mates with the module’s female HD15 connector. It provides a regulated
5 V and ground to various digital logic functions within the NI 9753. It is active whenever the
CompactRIO or R Series Expansion Chassis is properly powered. The NI 9753 should be
powered at the HD15 connector by plugging it into a CompactRIO or R Series Expansion
Chassis. The module’s HD15 connector should not be connected to any other device.
The other power connection is at the external DB-37 connector labeled BATT (19) and GND
(18). Typical power sources will be from automotive 12 V or 24 V battery systems. The NI 9753
can accept power from a range of 6 V to 32 V. The maximum power to the NI 9753 is limited to
5 W. When the 5 V supply output is not being utilized, the NI 9753 requires up to 2 W from the
external supply, depending on the number of channels operated as outputs and on their switching
frequency. The external 5 V supply output can be used for the remainder of the 5 W power limit.
If the external 5 V supply output is shorted or overloaded, then the voltage output level will be
reduced in order to limit the total power to 5 W. This will cause the I/O transceivers to shutdown.
The NI 9753 requires both external power and power from the CompactRIO backplane. The
NI 9753 directs the high current path through the BATT and GND terminals on the front of the
module and not through the HD15 backplane connector.
Note The NI 9753 will not be recognized by software without both power supplies
active.
Note The external battery supply is not required in order for the NI 9753 to be
recognized by LabVIEW FPGA software. The RS485/422 channel transceivers will
not be active without the external battery supply.

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Platform Compatibility
NI Powertrain Control modules require a hardware support system to function. You cannot use
the modules independently or interfaced with third-party devices at the backplane HD15
connector. NI Powertrain Control modules are compatible with the following National
Instruments platforms:
• CompactRIO, which consists of a CompactRIO controller, chassis, or integrated
controller/chassis.
• NI PXI, which consists of any NI PXI chassis, NI PXI RT controller, and NI PXI-78xxR R
Series FPGA card. The NI Powertrain Control modules insert into an NI R Series expansion
chassis. Connect an NI R Series expansion chassis to the NI PXI FPGA card using a
SHC68-68-RDIO cable.
Note NI Powertrain Control modules are not compatible with the National
Instruments CompactDAQ chassis.
You can use NI Powertrain Control modules with NI cRIO-911x, NI cRIO-907x, and NI R Series
Expansion systems under the following conditions:
• Leave one empty chassis slot between NI Powertrain Control modules and other NI
modules.
• Maintain an ambient system operating temperature of 0 °C to 45 °C.
Note Typical specifications of National Instruments modules might not apply when
used in a system with NI Powertrain Control modules.
Note National Instruments guarantees warranted specifications for all National
Instruments modules except thermocouple modules when used in a system with NI
Powertrain Control modules.
Note National Instruments recommends the NI 9214 for thermocouple
measurements in CompactRIO systems using NI Powertrain Control modules.
Note NI Powertrain Control modules do not support Scan Interface mode,
auto-detection, or ID mode.

NI 9753 User Manual |© National Instruments |5
Inputs and Outputs
Each differential I/O channel can be individually configured for input or output and meets or
exceeds TIA/EIA RS-485 requirements. Channels with signaling rates up to 10 Mbps are
configured for input or output via the provided LabVIEW FPGA VI.
Overvoltage Protection
The RS485 input/output pins of the NI 9753 can be shorted together, shorted to ground, or
shorted to -7 V to +12 V without damaging the channels. The RS485 input/output pins may be
subjected to ±50 V, 15 µs wide, 1% duty cycle pulses via a minimum of 100 Ωresistance without
damage. A channel differential pin pair can withstand a differential input voltage of ±12V.
Compliance and Certifications
Safety
This product meets the requirements of the following standards of safety for electrical equipment
for measurement, control, and laboratory use:
• IEC 61010-1, EN 61010-1
• UL 61010-1, CSA 61010-1
Electromagnetic Compatibility
This product meets the requirements of the following EMC standards for electrical equipment
for measurement, control, and laboratory use:
• EN 61326-1 (IEC 61326-1): Class A emissions; Industrial immunity
• EN 55011 (CISPR 11): Group 1, Class A emissions
• AS/NZS CISPR 11: Group 1, Class A emissions
• FCC 47 CFR Part 15B: Class A emissions
• ICES-001: Class A emissions
Caution When operating this product, use shielded cables and accessories.
CE Compliance
This product meets the essential requirements of applicable European Directives as follows:
• 2006/95/EC; Low-Voltage Directive (safety)
• 2004/108/EC; Electromagnetic Compatibility Directive (EMC)

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Environmental Management
NI is committed to designing and manufacturing products in an environmentally responsible
manner. NI recognizes that eliminating certain hazardous substances from our products is
beneficial to the environment and to NI customers.
For additional environmental information, refer to the Minimize Our Environmental Impact web
page at ni.com/environment. This page contains the environmental regulations and
directives with which NI complies, as well as other environmental information not included in
this document.
Waste Electrical and Electronic Equipment (WEEE)
EU Customers At the end of the product life cycle, all products must be sent to
a WEEE recycling center. For more information about WEEE recycling centers,
National Instruments WEEE initiatives, and compliance with WEEE Directive
2002/96/EC on Waste and Electronic Equipment, visit ni.com/environment/
weee.
Battery Replacement and Disposal
Battery Directive This device contains a long-life coin cell battery. If you need
to replace it, use the Return Material Authorization (RMA) process or contact an
authorized National Instruments service representative. For more information
about compliance with the EU Battery Directive 2006/66/EC about Batteries
and Accumulators and Waste Batteries and Accumulators, visit ni.com/
environment/batterydirective.
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NI 9753 User Manual |© National Instruments |7
Output Characteristics
Digital Output Logic Levels at 8 mA loads
High .................................................................. 4.0 V to 5.0 V
Low................................................................... 0.1 V to 0.4 V
Input Characteristics
Differential Input Logic Levels
High .................................................................. (a - b) > 200 mV
Low................................................................... (a - b) < -200 mV
Physical Specifications and Characteristics
Weight............................................................... 170 g
Maximum Altitude ........................................... 2000 m
Maximum Ambient Temperature ..................... 70 ºC
Operating Humidity.......................................... 10% to 90% RH, noncondensing
Pollution Degree ............................................... 2
Ingress Protection ............................................. IP40
For indoor use only.
If you need to clean the module, wipe it with a dry towel.
Safety Guidelines
Caution Do not operate the NI 9753 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.

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376102A-01 Jun13
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