Network Configuration; Compatible Cables - Omron DEVICENET Operation Manual

Network Configuration

Terminating Resistors
(Terminators)
Connecting to a T-branch
Tap or Power Supply Tap
(See note 1.)
Trunk
Terminating
line
Resistor
T-branch
Tap
Terminating
Trunk
Resistor
line
T-branch
Tap
Ground
2-2

Network Configuration

2-2-1

Compatible Cables

Cable Requirements
32
Use the methods shown below to connect the Terminating Resistors to the
trunk line. Refer to 2-4-8 Connecting the Terminating Resistors (Terminators)
for wiring details.
Connecting to a
Terminal Block
(See note 2.)
DRS1-1 Terminal-block
Terminating Resistor
Node
Note 1. Connect a Terminating Resistor to the Tap when there is a T-branch Tap or
Power Supply Tap at the end of the trunk line.
2. The Terminal-block Terminating Resistor method can be used when a
node is connected at the end of the trunk line with the multi-drop connec-
tion method.
3. Use this method when there is an Environment-resistive Slave at the end
of the trunk line.
4. Use this method when using Flat Cable.
Use any one of the methods shown below to ground the network by connect-
ing the cable's shielding to an acceptable ground (100 Ω or less.) Ground the
network at one point only.
Refer to 2-4-9 Grounding the Network for wiring details.
Grounding a Power
Supply Tap
Trunk
line
Trunk
line
Always use DeviceNet cables that meet all DeviceNet specifications. The Net-
work may not operate properly if other cable is used.
Cable type
Thick Cable
Thin Cable
Flat Cable
Refer to the home page of the ODVA for information on DeviceNet cables
other than the ones listed above.
Connecting to a
T-branch Connector
(See note 3.)
Shielded
Connector
T-branch
with
Connector
terminator
(DRS2-1,
Trunk
DRS2-2, or
line
DRS3-1)
Branch
line
Grounding a Connector
of a T-branch Tap or Node
S
−
V−
24 VDC
+
Node
S
−
V−
24 VDC
V+ +
OMRON model number
DCA2-5C10
DCA1-5C10
DCA4-4F10
Section 2-2
Connecting a Terminating
Resistor to a Flat Connector
Socket (See note 4.)
Trunk
line
Flat Connector
Socket
(DCN4-TR4-1)
Grounding an Unused
T-branch Tap Connector
T-branch
Tap
Open connector
Terminating
Resistor
(DCN4-TM4)