National Instruments Direct Injector Driver System Manual
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Detail: Indicates the external battery voltage supply level to DI Driver module terminals 0 (BATT) and 9
(GND). This should be in the range of 9-32V. While the internal boost supply will function from the 9-32V
battery voltage, it will operate more efficiently and cooler if the battery voltage is in the range of 24V, as
opposed to 12V. The performance and power dissipation of the module and internal boost power supply are
dependent on the injector load and rate of injection events.
Internal High Voltage
Tip Strip: Internal boost supply high voltage level
Units: V
Detail: Indicates the actual internal boost power supply voltage.
External High Voltage
Tip Strip: High voltage level supplied externally to terminal 7 of DI Driver to override internal boost supply
Units:V
Detail: Indicates the external high voltage supply level. If the external high voltage supply pin (7 EXT PWR)
is connected to a level greater than 24V, then the internal boost power supply will automatically shut down
and rely on external power. Using an external high voltage supply is occasionally necessary, depending
on injector operating requirements. Contact your National Instruments sales engineer or support team to
determine if your application requires an external high voltage supply.
OverLoad Integrator
Tip Strip: Indicates level of internal boost power supply load
Units: %