3G2A5-DA002 Omron, 3G2A5-DA002 Datasheet - Page 41

• Manufacturer Part Number: 3G2A5-DA002
• Description: C500 2-D/A: 0 TO +10V
• Manufacturer: Omron

Specifications of 3G2A5-DA002

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Mounting the Units
28
The figure above shows a total of six I/O Units mounted to the Backplane. Back-
planes are available in different lengths, and can hold a different number of I/O
Units accordingly. Of course, not all I/O Units look exactly alike, but the ones in
the figure show their typical appearance. This configuration of Backplane,
Power Supply, CPU, and I/O Units is called a CPU Rack. This term refers to the
Backplane and all the Units mounted to it. However, if we want to include more
than six I/O Units in our configuration we can add an additional Backplane. First,
though, we have to mount an I/O Control Unit to the leftmost slot of the CPU
Rack.
Now we can use a cable to connect the CPU Rack to another Backplane. This
Backplane has a Power Supply and I/O Units mounted to it, but it has no CPU of
its own. The additional Backplane must also have an I/O Interface Unit mounted
to its leftmost position. This configuration of additional Backplane, Power Sup-
ply, I/O Units, and I/O Interface Unit is called an Expansion I/O Rack.
The CPU Rack and Expansion I/O Rack shown above are connected by a cable.
Remember that this whole configuration is still referred to as one PC. It is possi-
ble to keep adding Expansion I/O Racks in this way until the maximum number of
I/O points for the system is reached. Each Expansion I/O Rack needs an I/O In-
terface Unit.
I/O Control Unit
I/O Interface Unit
Expansion I/O Rack
CPU Rack
Section 3-1