3-3
Section
Sharing the Communications Power Supply
29
3-3-3 Locating the Power Supply
The power supply can be located in the configurations shown below. Basically,
select from the configurations 1. and 2.
Consider using configuration 3. when power supply specifications cannot be
met by configurations 1. and 2. It is possible to use configuration 4. for a duplex
power supply. Refer to sections 3-3-4 to 3-3-6 for more details concerning each
configuration.
1, 2, 3...
1. Locating the Nodes on Both Sides of the Power Supply
Power Supply Tap
or T-branch Tap
Communications
power supply
Node
Node
Node
Node
Node
2. Locating the Nodes on One Side of the Power Supply
Note Configuration 1. is recommended for a single power supply to several nodes.
Power Supply Tap
or T-branch Tap
Node
Node
Node
Node
Node
Communications
power supply
3. Splitting the Power Supply System with Multiple Power Supplies
Communications
power supply
Communications
power supply
System 1
Special Power Supply Tap
Remove the fuse
and split +V.
Make –V the same for
Systems 1 and 2.
Special Power Supply Tap
System 2
Node
Node
Node
Node
Node
V+
V–
fuse
24 V
0 V
4. Duplex Power Supply with Multiple Power Supplies
Communications
power supply
Communications
power supply
Special Power
Supply Tap
Node
Node
Node
Node
Node
Special Power
Supply Tap
Power Supply Location
Patterns