24
2-2-5 Backplanes
There are two types of Backplane: the CPU Backplane, used for the CPU Rack,
and the I/O Backplane, used for Expansion I/O Racks. The Backplane serves to
hold and connect the following types of Unit: the CPU Unit, the Power Supply
Unit, I/O Units, Special I/O Units, etc.
The components of the Backplanes are shown in the following diagrams and
described following them. The numbers in the diagram correspond to the num-
bers of the following items in the description.
CPU Backplane
1. Backplane
mounting
screw
2. Power Supply
Unit connector
3. CPU Unit
connector
4. Unit mounting slots
5. Unit connector
6. Unit lock levers
7. I/O Connecting Cable connector
I/O Backplane
4. Unit mounting slots
5. Unit connector6. Unit lock levers
7. I/O Connecting Cable connector
1. Backplane
mounting
screw
2. Power Supply
Unit connector
1, 2, 3... 1. Backplane Mounting Screws
Mount the Backplane firmly using four M4 screws.
2. Power Supply Unit Connector
Connect the Power Supply Unit.
3. CPU Unit Connector
Connect the CPU Unit.
4. Unit Mounting Slots
Mount one Unit to each slot. There are 3, 5, 8, or 10 slots available on the
Backplane depending on the model of Backplane used.
5. Unit Connectors
Connect I/O Units, Special I/O Units, Interrupt Input Units, and/or Analog
Timer Units.
Note Attach a C500-COV01 Connector Cover to any slot that is not being used to pre-
vent dust and dirt from entering the unused connectors.
6. Unit Lock Levers
The lock levers hold the Units in place. Press down on the level and pull up
on the Unit to release the lock.
7. I/O Connecting Cable Connector
Connect the I/O Cable from the CPU Rack to the first Expansion I/O Rack or
between adjacent Expansion I/O Racks to this connector.
Units
Section 2-2
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