Chapter 5
Signal Connections
©
National Instruments Corporation
5-13
NI PCI-7342 Hardware User Manual
Figure 5-9.
Shutdown Input Circuit
Figure 5-10.
Breakpoint Output Circuit
Analog Inputs
The PCI-7342 controller has the following ADC input signals:
•
Analog Input <1..2>
—The PCI-7342 controller includes an
8-channel multiplexed, 12-bit ADC capable of measuring ±10 V, ±5 V,
0–10 V, and 0–5 V inputs. ADC channels 1 and 2 are brought out
externally on the 68-pin motion I/O connector. ADC channels 5
through 8 connect internally, as shown in Table 5-2. You can use these
signals for ADC testing.
Table 5-2.
Internal ADC Channels
ADC Input
Signal
3
Unavailable
4
Unavailable
5
Fi5 V
6
Floating (NC)
7
Analog Reference (7.5 V)
8
Analog Input Ground
From the External
Connector
Shutdown Pin
To the
Shutdown
Circuits
3.3 k
Ω
DGND
Vcc
74HC244
1 k
Ω
1/8 W
To the External
Connector Step,
Direction, or Inhibit Pins
From the
Step, Direction,
or Inhibit Circuits
74AS760
Vcc
3.3 k
Ω
