NI WSN-3230/3231 User Guide and Specifications
20
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Figure 17.
WSN-3230/1 Battery Life vs. Sample Interval at Various Transmit Intervals
1
Controlling Digital Inputs and Outputs
The following sections discuss how to configure the NI WSN-3230/3231 device for different types of
input and output, and how to connect external devices to the NI WSN-3230/3231 DIO terminals.
On the 18-position combicon screw terminal connector, terminals 13–17 are the DIO section. The DIO
section has the following terminals:
•
DIO
x
—signal terminal
•
DGND—ground terminal
•
DIO PWR—DIO Power positive (required when one of the DIO channels is configured for
Drive High and Low (Sinking and Sourcing)
mode)
Note
Use the
Node Properties
dialog box in the LabVIEW Project Explorer window to change
DIO settings.
The NI WSN-3230/3231 device has two bi-directional digital I/O channels. Each channel supports
eight operational modes depending on whether the channel is configured as digital output or digital
input. The NI-WSN software controls the different modes of operation by turning on and off the high
side and low side switches.
Digital Output Operational Modes
The channels support the following digital output operational modes:
•
•
•
3V TTL Logic (Open-Collector with Pull-Up)
•
Drive High and Low (Sinking and Sourcing)
1
Test Conditions: 9600 Baud, 50 bytes per Serial Message
B
a
tter
y Lif
e (Y
e
a
r
s
)
0.5
1
1.5
2
2.5
3
3
.5
3
00
250
200
150
100
50
Sa
mpling Interv
a
l (
S
econd
s
)
Tx 1 U
s
er-defined I/O
V
a
ri
ab
le Every Interv
a
l
Tx 10 U
s
er-defined I/O
V
a
ri
ab
le Every 10 Interv
a
l
s
0
0
4
