Operational Overview
Doc.#6000-0015 Rev: A
Page 28
Bridge sensor connections, illustrated in Figure 23, are:
a. Pin 1 (Ground) to the bridge’s Exc –.
b. Pin 2 () to one output side of the bridge.
c. Pin 3 (Signal -) to the other output side of the bridge.
d. Pin 4 (+5 V) to the bridge’s Exc +.
SIO
Pin 4
EXC 5 V
Pin 3
-Sense
Pin 2
+Sense
Pin 1
Ground
Bridge
Figure 23. Bridge Sensor Connections
SIO/Node Communication
When the SIO is plugged into the CrossNet Node, an interrupt signal is
generated to the Node. This causes the Node to interrogate the µP in the
SIO and request the TEDS to be uploaded. The Node extracts the
calibration information for the sensor so that all Node measurements can be
converted to engineering units. The Node also transmits the TEDS to the
hub to make all sensor information available to the user.
Configuring the SIO
SIOs have been designed so that users can program the TEDS in the field.
This is done using a PC utility program, CrossNet SIO Configurator. See
Appendix B for SIO configuration and programming details.
Hubs
A CrossNet hub can be any Bluetooth-enabled device for data acquisition
and/or analysis that is running Softsense software. The hub downloads
data, including the TEDS information for sensor self-identification, from
multiple nodes. Application software running on the host system then
displays the data in a user-defined format or links the data to a number of
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