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4 SYSTEM CONFIGURATION
4.2 Limitations on the Number of Connected Extension Devices
Number of connected extension modules
Overall system limitation
There is a limitation on the number of connected extension modules in a whole system as follows.
Connection to the CPU module
There is a limitation on the number of extension modules connected to the CPU module as follows.
The number of extension modules added from the right side of the CPU module to powered input/output module or the
extension power supply module must be as follows.
Type Limitations
Extension module Up to 16 modules can be connected to a system.
(Extension power supply modules are excluded.)
Extension power supply module Up to 2 modules
can be connected to a system.
Bus conversion module Only 1 module
can be connected to a system.
Type Limitations
Total No. of input modules, output modules, intelligent function modules, and bus
conversion modules
Up to 12 modules can be connected.
Total No. of intelligent function module and bus conversion modules Up to 8 modules
can be connected.
• • • • • • • • • • • •
Up to 16 modules (excluding extension power supply module)
Up to 1 module
Up to 2 modules
CPU module
I/O
module
I/O
module
Extension
power
supply
module
Extension
power
supply
module
Bus
conversion
module
Up to 12 modules
Up to 8
modules
CPU module
FX5
Intelligent
module
FX5
Intelligent
module
Powered input/
output module,
FX5 extension
power supply
module
Input
module,
Output
module
Input
module,
Output
module
Up to 12 modules
CPU module
FX3
Intelligent
module
Up to 8 modules
Intelligent
module
FX3
Intelligent
module
Bus
conversion
module
Input
module,
Output
module
FX3 extension
power supply
module