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SI-DeviceNet User Guide
7
Issue Number: 2
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Introduction
2.1
What Is DeviceNet?
DeviceNet is a networking system that falls into the generic category of Fieldbus.
Fieldbuses are generally defined as industrial networking systems that are intended to
replace traditional wiring systems. Figure 2-1 shows the traditional cabling requirements
to transfer signals between a controller and two nodes.
Figure 2-1 SI-DeviceNet Traditional cable layout
Table 2.1 details how the wiring is used to communicate data between the controller and
the nodes. Each signal that is communicated requires one signal wire giving a total of 66
signal wires plus a 0V return.
Table 2.1 Traditional wiring details
Number of
signals
Type
Source / Destination
Description
16
digital inputs
node 1 to master
status signals
digital outputs
controller to slave 1
control signals
1
analog output
controller to slave 1
control signal
16
digital inputs
node 2 to master
status signals
digital outputs
controller to slave 2
control signals
1
analog output
controller to slave 2
control signal
Hardwired controller
1
2
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A
Di
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l1
B
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l2
A
D
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2B
Digital 1A Digital 1B
Digital 2A Digital 2B
Analog 1
Analog 2
Analog 1
Analog 2
Содержание SI-DeviceNet
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