National Instruments NI DIDS-2103, User Manual

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Figure 3.3.3.1.a, Diagram of Typical Wiring of Solenoid Injectors to a DI Driver Module
Piezo Injector Wiring
Driving piezo injectors requires in-series inductance on the high side wire (INJX+ wire) and shorting of channel 3.
Shorting channel 3 is required to discharge the piezo actuator of channel 1 and channel 2. This means that each DI
Driver module can only operate two (2) channels of piezo injectors.
NI provides two (2) piezo inductors per DI driver module in a DI Driver System order.
Typical wiring for piezo injectors to a DI Driver module is shown in figure 3.3.3.1.b.
Figure 3.3.3.1.b, Diagram of Typical Wiring of Piezo Injectors to a DI Driver Module