INSTALLATION
3-19
Hardware
and Installation User Manual
3.6 INSTALLING SYSTEM COMPONENTS
A
base assembly is composed of one or two logical bases. A logical base is defined
as a group of eight I/O slots, as shown in Figure 3-15. Therefore, the
PPX:505–6516 sixteen-slot base assembly comprises two logical bases, while
the PPX:505–6508 eight-slot base assembly contains one logical base. The
four-slot
PPX:505–6504 base also contains one logical base, but slots 5–8 do not
physically
exist. A system may consist of as many as 16 logical bases and up to
1023
I/O points.
Power
supply
One Logical
base
8 slots
Logical base
8 slots
One logical
base
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4 Physical slots
4 Non–existent slots
Logical base
8 slots
Power
supply
Power
supply
TI525/TI535
PLC
TI525/TI535
PLC
TI525/TI535
PLC
PPX:505–6508
8–slot base
PPX:505–6516 16–slot base
PPX:505–6504 4–slot base
Figure 3-15 Definition of the Series 505 Logical Base
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