National Instruments Direct Injector Driver System Manual
© 2013 National Instruments. All rights reserved.
1. About the NI Direct Injector Driver System
The NI Direct Injector Driver System features an NI CompactRIO controller, NI 9751 Direct Injector (DI) driver
module(s), and NI 9411 digital input module(s). The system can synchronize injector channels with production
crank/cam position sensors or research optical encoders. The system will also accept external digital fuel command
signals from a production engine controller. The included DI driver module(s) provide the power electronics
necessary to drive high-power solenoid or piezoelectric direct injectors.
The NI Direct Injector Driver System comes in four different models corresponding to different direct injector channel
configurations: the NI DIDS-2003 drives 3 solenoid injectors (or 2 piezoelectric injectors), the NI DIDS-2006 drives
6 solenoid injectors (or 4 piezoelectric injectors), the NI DIDS-2009 drives 9 solenoid injectors (or 6 piezoelectric
injectors), and the NI DIDS-2012 drives 12 solenoid injectors (or 8 piezoelectric injectors). The systems provide a
digital input per injector channel for directly commanding each injector. The system controller is delivered with a pre-
installed feature-rich application. The deployment version of the NI Software Calibration Manager Toolkit (SCM) is
included for interfacing with and calibrating the system.
The NI Direct Injector Driver System supports optional C-series modules. The optional NI 9758 PFI driver module
can be used to drive port fuel injectors, proportional solenoid valves and relays. The optional NI 9215 analog input
module can be used for a variety of analog sensors. Common-rail fuel pressure control is an example feature of the
NI Direct Injector Driver System that utilizes these modules.
Throughout this manual, the model number NI 9751 and model name DI Driver module are used interchangeably.
Similarly, the model number NI 9758 and model name PFI Driver are used interchangeably.