Omron DEVICENET Operation Manual page 44

Network Configuration Overview
Network with General-purpose Slaves and Environment-resistive Slaves Using Flat Cable
Flat Cable Power Supply Terminal
Block with Terminating Resistance
(DCN4-TP4D)
Communications
power supply
Environment-
resistive Slave
Network with General-purpose Slaves Using Special Thin Cable for Trunk Line and Flat Cable for
Branch Lines
Connect terminators at both
ends of the trunk line.
T
Flat Cable Connector:
DCN4-SF4D
Branch
Use Special
line
Flat Cable.
Connectors for node
connections
(DCN4-SF4D)
Node
Nodes
Trunk/Branch Lines
Terminator
T-branch Connector
(Combination of
DCN4-TR4-1 and
DCN4-BR4)
Trunk line
Branch
line
Thin cable
T-branch Connector (branch Line)
(Combination of DCN4-TR4-1
and DCN4-BR4D)
Connectors for node
Node
connections
(DCN4-SF4D)
Ground to
100 Ω or less.
Trunk line Trunk line
T T
T-branch T-branch
Tap Tap
Branch Branch
line line
Node Node
Node
There are two kinds of nodes in a DeviceNet Network: Slaves and Masters.
The Slaves connect to external I/O and the Masters manage the Network and
the external I/O of the Slaves.
Note The Master and Slaves can be connected at any location in the Network, as
shown in the preceding diagram.
The trunk line refers to the cable that has Terminating Resistors on both ends.
Node
Use Special Thin
Communications
Cable.
power supply
24 VDC
Power Supply Tap
Trunk
Trunk line
or T-branch Tap
line
T
T-branch T-branch
Tap Tap
Branch
line
Branch
line
Node
Node
T-branch Node
Connector
(branch line)
(Combination of
DCN4-TR4-1 and
Node
DCN4-BR4)
Section 2-1
Connector with Terminating Resistance
(Combination of DCN4-TR4-1
and DCN4-TM4)
Connectors for node connections
Node
(DCN4-SF4D)
Connect terminators at both
ends of the trunk line.
Trunk Trunk
M M
line line
T
Node Node
T: T-branch connection
M: Multi-drop connection
Trunk line: Use Special Thin Cable.
Branch lines: Use Special Flat Cable.
Flat Cable Connector: DCN4-SF4D
Node Connector: DCN4-SF4D
Terminator
T-branch
Tap
23