User`s manual

DeviceNet (Master) Function
8-5
8
[4] Power supply
Connect the communication power supply to the trunk.
Two of the five conductors in the cable used for trunk and branch lines are assigned to carry power for
communication (24 VDC).
The following methods can be used to connect a communication power source to the trunk.
When connecting one
power supply device
to a network
When connecting
more than one power
supply device to a
network
Use a T branch tap or a power tap.
Termination
resistance
Node
Use a power tap.
Power tap
Termination
resistance
T branch tap or power tap
Power supply for
communication
(24 VDC)
Power tap
Power supply for
communication
(24 VDC)
Power supply for
communication
(24 VDC)
Termination
resistance
Termination
resistance
Node Node Node
Node Node Node
Node
Configuration of a power tap
V- V+
V+ (24V)
Signal wire CAN H
Shield
Signal wire CAN L
V- (0V)
Power tap
Ground
terminal
24 VDC power source
Schottky
barrier
diode
Fuse
Five
conductor
cable
Five
conductor
cable
Fuse
V+ (24V)
Signal wire CAN H
Shield
Signal wire CAN L
V- (0V)
Remarks
- Do not share the communication power source with other devices.