YASKAWA DX200 Instructions Manual page 53

165626-1CD
JARCR-XFB01B Board
for DeviceNet
6.1.1.2 Configuration Elements





6 Network Specifications
6.1 Network Configuration
The network is configured from the following elements.
Node
A node is either a slave that connects to an external I/O unit, or the master
that manages the I/O of the slaves. There are no restrictions on the
location of the master or slaves. Any node in the figure above 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.
Connection methods
A node is connected using the T-branch method or multi-drop method.
A T-Branch Adapter is used to connect a node with the T-branch method. A
node is directly connected to the trunk line or a drop line with the multi-drop
method.
Both T-branch and multi-drop methods can be used together in the same
network, as shown in the figure above.
Terminator
both ends of the trunk line must connect to terminator to decrease signal
reflection and ensure stable network communications.
Communications power supply
The communications connector of each node must be provided with a
communications power supply through the communications cable for
DeviceNet communications.
Provide the communications power supply, the internal circuit power supply, and
the I/O power supply separately.
1. The communications cable must be a DeviceNet cable.
2. Both ends of the trunk line must connect to a terminator.
The following is the specification for the terminator.
Resistance Value
Allowable Difference of
Resistance Value
NOTE
Rating Power
Type
3. Only DeviceNet devices can be connected to the
network. Do not connect any other devices, such as a
lightning arrester.
6-2
121Ω
±1%
1/4W
Metal Film Resistor
HW1481973
53/70