Chapter 5 Signal Connections
NI 7350 User Manual 5-12 ni.com
Trigger Input and Shutdown Input Circuits
Trigger (position capture) input and shutdown input circuits have onboard
pull-up resistors, and are interpreted as high logic level if left floating.
Analog Inputs
The NI 7350 controller has the following ADC input signals:
•Analog Input <1..8>—The NI 7350 controller includes an
eight-channel multiplexed, 16-bit ADC capable of measuring ±10 V,
±5 V, 0–10V, and 0–5V inputs.
You can configure each ADC channel for motion feedback, simple
A/D conversion, or both.
You can read the digital value of analog voltage on any of the ADC
channels of the controller by using the Read ADC function. Table5-2
shows the range of values read back and the voltage resolution for each
setting. The voltage resolution is in microvolts per least significant
bit (μV/LSB).
When configured as analog feedback, an analog sensor acts like a
limited range absolute position device with a full-scale position range.
You can map any ADC channel as feedback to any axis.
You can enable and disable individual ADC channels in software.
Disable unused ADC channels for the highest multiplexer scan rate
performance. Properly enabled, the scan rate is high enough to support
analog feedback at the highest PID sample rate.
•Analog Input Ground—To help keep digital noise out of the analog
input, a separate return connection is available. Use this reference
ground connection and not Digital Ground (digital I/O reference)
orA nalog Output Ground as the reference for the analog inputs.
Table 5-2. Analog Input Voltage Ranges
Input Range Binary Values Resolution
±10 V –32,768 to 32,767 305μV/LSB
±5V –32,768 to 32,767 153μV/LSB
0–10 V 0 to 65,535 153 μV/LSB
0–5 V 0 to 65 ,535 76 μV/LSB