© National Instruments
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4-1
4
Signal Connections
This chapter includes instructions on how to make input and output signal connections directly
to the National Instruments PXI/PCI-7330 as well as general information about the associated
I/O circuitry.
The NI 7330 motion controller has three connectors that handle all signals to and from the
external motion system:
•
68-pin motion I/O connector
•
68-pin digital I/O connector
•
RTSI connector
You can connect to your motion system with cables and accessories, varying from simple screw
terminal blocks to enhanced Universal Motion Interface (UMI) units and drives.
Note
The NI 7330 motion controller does not provide isolation between circuits.
Caution
Power off all devices when connecting or disconnecting the NI 7330
motion controller controller motion I/O and auxiliary digital I/O cables. Failure to do
so may damage the controller.
Motion I/O Connector
The motion I/O connector contains all of the signals required to control up to four axes of stepper
motion, including the following features:
•
Motor command stepper outputs
•
Encoder feedback inputs
•
Forward, home, and reverse limit inputs
•
Breakpoint outputs
•
Trigger inputs
•
Inhibit outputs
The motion I/O connector also contains four channels of 12-bit A/D inputs for analog feedback
or general-purpose analog input.
Figure 4-1 shows the pin assignments for the 68-pin motion I/O connector on the NI 7330
motion controller. Table 4-1 includes descriptions for each of the signals. A line above a signal
name indicates that the signal is active-low.
