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6 Examination of System Configuration
6.5 Expansion of Main Unit
78
FX3G Series Programmable Controllers
User's Manual - Hardware Edition
3 Check whether extension from the 24V DC service power supply is possible.
Check using the quick reference matrix shown below whether the number of points whose exten-
sion is judged as impossible in step 2 can be added using the 24V DC service power supply.
A special function block is handled in the same way as 16 output points.
Example: When 8 input points and 8 output points are connected, the current of the 24V DC service
power supply becomes 150mA or less.
4 Confirm the current capacity of the 24V DC service power supply from the
value shown in the quick reference matrix.
This remaining power supply capacity (current) can be used as a power supply for external loads
(such as sensors), special adapters and special function blocks by the user.
→ For the current capacity of a special adapter,
refer to the manual for each special adapter.
→ For the current capacity of a special function block,
refer to Subsection 6.8.3.
If it is not possible to connect input/output extension blocks even using the 24V DC service power
supply of the main unit, consider adding an input/output powered extension unit to the system.
→ Refer to 6.6 Expansion of FX2N Series I/O Powered Extension Unit.
0 8 16 24 32
Number of added points
Output
Number of
added points
100 016
250 508
400 300 200 100 00
Input
150
(Example)