4 Connectors
4.5.2 DeviceNet Communications Connection Example
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4
4.5.2 DeviceNet Communications Connection Example
A DeviceNet network configuration is shown below.
Fig. 4.2 Network Connections
Configuration Elements
The network is configured from the following elements.
Nodes
A node is either a slave that connects to an external I/O, or the master that manages the
external I/O of the slaves. There are no restrictions on the location of the master or slaves.
Any node in
Fig 4.2
can be the master or a slave.
Trunk Line and Drop Lines
A cable with a terminator on each end is a trunk line. Any cable branching from the trunk
line is a drop line. The length of the trunk line and the maximum network length are not
necessarily the same. Use special DeviceNet cables for the trunk line and all drop lines.
Either thick cables or thin cables may be used.
Connection Methods
There are two methods that can be used to connect DeviceNet nodes: T-branch connections
and multi-drop connections.
• T-branch connections: Used to branch a drop line using a T-branch Tap.
• Multi-drop connections: Used to connect a node directly to the trunk line or directly to a
drop line.
As shown in
Fig 4.2
, both T-branch connections and multi-drop connections can be used
together in the same network.
T
T
T
T
T
T
M
M
M
M
M
Connect terminating resistors
to both ends of the trunk line.
Trunk line
Trunk line
Trunk line
Trunk
line
Trunk
line
Trunk
line
Drop line
Drop line Drop line
Drop line
Drop line
Drop line
Drop line
T-branch
Tap
T-branch
Tap
T-branch
Tap
T-branch
Tap
T-branch
Tap
T-branch Tap
Node
Node
Node
Node
Node
Node
Node
Node
Node
Node
24 VDC
Communications
power supply
Power Supply Tap
or T-branch Tap
Use special
DeviceNet cables.
Connect terminating resistors
to both ends of the trunk line.
Use special
DeviceNet cables.
Trunk and drop lines: Use special
T: T-branch connection
M: Multi-drop connection
DeviceNet cables (5-wire cable).
Summary of Contents for OMNUC W R88A-NCW152-DRT
Page 1: ...Cat No I538 E3 1 DeviceNet Option Unit OMNUC W Series Model R88A NCW152 DRT...
Page 53: ...4 Connectors 4 5 3 DeviceNet Network Configuration Restrictions 4 22 4...
Page 97: ...5 Parameter Settings 5 3 8 Notch Signal Output Positioning 5 44 5...
Page 211: ...8 Servo Driver Settings 8 5 3 Absolute Encoder Multi turn Limit Setting 8 24 8...
Page 257: ...9 Troubleshooting 9 46 9...