National Instruments 7340 PCI Benutzerhandbuch
Chapter 5
Signal Connections
5-12
ni.com
Figure 5-6. Shutdown Input Circuit
Figure 5-7. Breakpoint Output Circuit
Analog Inputs
The 7340 has the following ADC input signals:
•
Analog Input <1..4>—The 7340 includes an eight-channel
multiplexed, 12-bit ADC capable of measuring ±10 V, ±5 V, 0–10 V,
and 0–5 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 5-2. These
signals can be used for ADC test and system diagnostics.
multiplexed, 12-bit ADC capable of measuring ±10 V, ±5 V, 0–10 V,
and 0–5 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 5-2. These
signals can be used for ADC test and system diagnostics.
Table 5-2. Internal ADC Channels
ADC Input
Signal
5
Filtered +5 V
6
Floating (NC)
7
Analog Reference (7.5 V)
8
Analog Input Ground
74FCT244
1 k
Ω
1/8 W
From the external
connector
shutdown pin
connector
shutdown pin
To the shutdown
circuits
circuits
DGND
Vcc
3.3 k
Ω
To the external
connector
breakpoint pins
connector
breakpoint pins
From the
breakpoint
circuits
breakpoint
circuits
Vcc
3.3 k
Ω
74AS760