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CompactRIO 2-Channel, 3 Vrms, 24-Bit Differential Analog Input Module
You can use an FPGA I/O Node, configured for reading, with this device.
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Note You can synchronize an NI 9251 module with other modules that have a selectable timebase source. |
Use the FPGA I/O Node to access the following terminals for this device.
Terminal | Description |
---|---|
AIx | Analog input channel x, where x is the number of the channel. The NI 9251 has channels 0 to 1. |
Onboard Clock | Gives access to the onboard clock in the LabVIEW block diagram. The onboard clock frequency is 13.1072 MHz. Use the FPGA I/O Node in a single-cycle timed loop to access this channel. You must export the onboard clock of the NI 9251 to access this channel. |
Start | Channel that controls when the NI 9251 starts acquiring data. If TRUE is written to the Start channel, the NI 9251 starts acquiring data. When the NI 9251 is acquiring data, you must write TRUE to the Stop channel before you can access properties for the module. If FALSE is written to the Start channel, no operation is performed. |
Stop | Channel that controls when the NI 9251 stops acquiring data. If TRUE is written to the Stop channel, the NI 9251 stops acquiring data. When the NI 9251 is acquiring data, you must write TRUE to the Stop channel before you can access properties for the module. If FALSE is written to the Stop channel, no operation is performed. |
This device supports only the Arbitrate if Multiple Requestors Only option for arbitration. You cannot configure arbitration settings for this device.
Use the FPGA I/O Property Node to access the following I/O properties for this device.
Property | Description |
---|---|
Input Configuration | Sets the input configuration of the corresponding channel to one of two modes: AC Coupled; DC Coupled. |
Use the FPGA I/O Property Node to access the following module properties for this device.
Property | Description |
---|---|
Data Rate | Sets the rate at which the NI 9251 acquires data. |
Module ID | Returns the module ID, 0x77E9. |
Serial Number | Returns the unique serial number of the module. |
Vendor ID | Returns the NI vendor ID, 0x1093. |
This device does not support the single-cycle Timed Loop.
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