Internal Channels for C Series Devices
The following table lists the internal channels for the NI 9211 device.
| Internal Channel Name | Description |
|---|---|
| _aignd_vs_aignd | A differential terminal with the positive and negative terminals both connected to the ground reference for analog input. |
| _calref_vs_aignd | A differential terminal with the positive terminal connected to the internal calibration reference voltage and the negative terminal connected to the ground reference for analog input. |
| _cjtemp | A differential terminal with the positive terminal connected to the onboard temperature sensor and the negative terminal connected to the ground reference for analog input. This channel is used for cold-junction compensation. |
The following table lists the internal channels for the NI 9205 and NI 9206 devices.
| Internal Channel Name | Description |
|---|---|
| _aignd_vs_aignd | A differential terminal with the positive and negative terminals both connected to the ground reference for analog input. |
| _calref_vs_aignd | A differential terminal with the positive terminal connected to the internal calibration reference voltage and the negative terminal connected to the ground reference for analog input. |
| _aignd_vs_aisense | A differential terminal with the positive terminal connected to the ground reference for analog input and the negative terminal connected to physical channel AI SENSE. |
| _calSrcHi_vs_aignd | A differential terminal with the positive terminal connected to the calibration PWM and the negative terminal connected to the ground reference for analog input. |
| _calref_vs_calSrcHi | A differential terminal with the positive terminal connected to the internal calibration reference voltage and the negative terminal connected to the calibration PWM. |
| _calSrcHi_vs_calSrcHi | A differential terminal with the positive and negative terminals connected to the calibration PWM. |
| _aignd_vs_calSrcHi | A differential terminal with the positive terminal connected to the ground reference for analog input and the negative terminal connected to the calibration PWM. |
| _calSrcMid_vs_aignd | A differential terminal with the positive terminal connected to the calibration PWM and the negative terminal connected to the ground reference for analog input. _calSrcMid is the divided down version of _calSrcHi. |
| _boardTempSensor_vs_aignd | A differential terminal with the positive terminal connected to the onboard temperature sensor and the negative terminal connected to the ground reference for analog input. |
| _ai0_vs_calSrcHi | A differential terminal with the positive terminal connected to physical channel ai0 and the negative terminal connected to the calibration PWM. |
| _ai8_vs_calSrcHi | A differential terminal with the positive terminal connected to physical channel ai8 and the negative terminal connected to the calibration PWM. |
The following table lists the internal channels for the NI cDAQ-9172 chassis.
| Internal Channel Name | Description |
|---|---|
| _ctr0 | This physical channel name does not refer to a terminal on the I/O connector but instead to a circuit within the device. You must set the Input Terminal or Output Terminal attributes/properties that are appropriate for the measurement/generation being performed. |
| _ctr1 | This physical channel name does not refer to a terminal on the I/O connector but instead to a circuit within the device. You must set the Input Terminal or Output Terminal attributes/properties that are appropriate for the measurement/generation being performed. |
| _freqout | This physical channel name does not refer to a terminal on the I/O connector but instead to a circuit within the device. You must set the Output Terminal attribute/property that is appropriate for the generation being performed. |
The following table lists the internal channels for the NI 9219 device.
| Internal Channel Name | Description |
|---|---|
_cjtemp0 |
A differential terminal with the positive terminal connected to the onboard temperature sensor and the negative terminal connected to the ground reference for analog input. This channel is used for cold-junction compensation for analog input channel 0. |
_cjtemp1 |
This channel is used for cold-junction compensation for analog input channel 1. |
_cjtemp2 |
This channel is used for cold-junction compensation for analog input channel 2. |
_cjtemp3 |
This channel is used for cold-junction compensation for analog input channel 3. |