2. Installation
If the current capacity consumed in the network exceeds the restriction of cable current
capacity, it is possible to install more than one power supply in the network. If you
attempt to install two or more power supplies, take necessary measures (pulling out a fuse
on the power supply tap, etc.) to avoid conflicts between power outputs from multiple
power supplies.
Terminating
Resistor
Following figure illustrates a sample wiring. An OMRON power supply tap is used in the
example.
Carefully connect the wires. Incorrect wiring may cause node malfunction and
severe damage to the entire DeviceNet network.
CAUTION
22
Power Supply Tap
2A
External
1A
Power Supply
1A
1A
24 V DC
Trunk Line
Pull out
the fuse.
Ground the
network at
only one point.
Ground 100 Ω or less.
If you cannot ground the network with 100 Ω or less,
do not connect V- and FG wires.
Power Supply Tap
Trunk Line
2A
2A
2A
Ground 100 Ω or less.
RC700 / RC90 Option Fieldbus I/O Rev.14
Terminating
Resistor
2A
1A
1A
1A
V+
V+
L
CAN L
S
Shield
H
CAN H
V-
V-