Omron DEVICENET -, Operation Manual

Page: 49 / 163

28
Network Configuration Overview Section 2-1
rent consumption of the nodes in the branch is less than 4.57/L or 3 A, which-
ever is lower.
Refer to SECTION 3 Communications Power Supply Methods for more
details.
Note 1. Always use DeviceNet cables.
2. Always connect terminators at both ends of the trunk line.
3. Do not install devices other than DeviceNet devices (e.g., a lightning arres-
tor) in the communications line. Devices other than DeviceNet-compatible
devices can cause effects such as signal reflection and interfere with De-
viceNet communications.
2-1-4 Connections
Branching Patterns
Branching from the Trunk Line
Note 1. The direct multi-drop connection cannot be used for Environment-resistive
Slaves.
2. If thick cable is being used, a multi-drop connector must be used to make
the direct multi-drop connection. (If thick cable is being used, the regular
COMBICON connector can be used to make a multi-drop connection.)
Branching from a Branch Line
Note 1. The direct multi-drop connection cannot be used for Environment-resistive
Slaves.
2. If thick cable is being used, a multi-drop connector must be used to make
the direct multi-drop connection. (If thick cable is being used, the regular
COMBICON connector can be used to make a multi-drop connection.)
The various connection methods can be combined on the same network, as
shown in the following diagram. There is no particular limit to the number of
1. One Branch
2. Up to Three Branches 3. Direct Connection
(See notes 1 and 2.)
Trunk
line Trunk
line
T-branch Tap or
Power Supply Tap
T-branch
Tap
Node
Node Node Node
Node
Branch line
Branch line
Multi-drop
Trunk
line Trunk
line Trunk
line Trunk
line
1. One Branch
2. Up to Three Branches 3. Direct Connection
(See notes 1 and 2.)
Branch
line Branch
line
T-branch Tap or
Power Supply Tap
T-branch
Tap
Node
Node Node Node
Node
Branch line
Branch line
Multi-drop
Branch
line
Branch
line Branch
line Branch
line