© National Instruments
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4-11
NI 7340 User Manual and Specifications
Figure 4-8.
Breakpoint Output Circuit
Analog Inputs
The NI 7340 motion controller has the following ADC input signals:
•
Analog Input <1..4>—The NI 7340 motion controller includes an eight-channel
multiplexed, 12-bit ADC capable of measuring ±10 V, ±5 V, 0 to 10 V, and 0 to 5 V inputs.
ADC channels 1 through 4 are brought out externally on the 68-pin motion I/O connector.
ADC channels 5 through 8 are connected internally, as shown in Table 4-2. These signals
can be used for ADC test and system diagnostics.
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 eight ADC channels of the
controller. Table 4-3 shows the range of values read back and the voltage resolution for each
setting. The voltage resolution is in volts per least significant bit (V/LSB).
Table 4-2.
Internal ADC Channels
ADC Input
Signal
5
Fi5 V
6
Floating (NC)
7
Analog Reference (7.5 V)
8
Analog Input Ground
Table 4-3.
Analog Input Voltage Ranges
Input Range
Binary Values
Resolution
±10 V
-2,048 to 2,047
0.0049 V/LSB
±5 V
-2,048 to 2,047
0.0024 V/LSB
0 to 10 V
0 to 4,095
0.0024 V/LSB
0 to 5 V
0 to 4,095
0.0012 V/LSB
To the extern
a
l
connector
b
re
a
kpoint pin
s
From the
b
re
a
kpoint circ
u
it
s
Vcc
3
.
3
k
Ω
74A
S
760
Summary of Contents for PXI-7340
Page 1: ...PXI 7342...
