Selection Example 2 Using The 24V Dc Service Power Supply Of The Main Unit - Mitsubishi Electric MELSEC-F FX3G Series User Manual

FX Series Programmable Controllers
3G
User's Manual - Hardware Edition
6.5.3

Selection example 2 using the 24V DC service power supply of the main unit

This subsection explains an example in which FX
system configuration using the 24V DC service power supply of the main unit.
<Example of configuration>
Main unit
1
Confirm the priority of all extension blocks to be connected to the main unit.
The priority is determined by the extension block type without regard to the connection position
from the main unit as shown below.
<Priority>
Main unit
2
Judge whether extension to the main unit is possible.
Judge the possibility of extension to the main unit for all extension blocks in turn, starting from a
block having the highest priority confirmed in step 1.
In this example, due to the restriction "two special function blocks", only the FX
1) and FX -2AD (priority 1) can be connected to the main unit.
2N
3
Check whether extension from the 24V DC service power supply is possible.
Check using the quick reference matrix whether 8 input points and 16 output points whose exten-
sion is judged as impossible in step 2 can be added.
Output
16 100
8 250 150
0 400 300 200 100
0 8
Number of added points
After 8 input points and 16 output points are connected, the remaining current of the 24V DC service power
supply is 50mA or less. Accordingly, it is possible to add 8 input points and 16 output points.
Input extension Special function
block block
8 points FX -64CCL
3U
Range extendible to main unit
(Special function block 1unit + Input/output 16 points)
Input extension
Special function
block block
8 points FX -64CCL
3U
Priority 3 Priority 1
0
50
0
16 24 32
Input
6 Examination of System Configuration
-2AD and 8 output points are added to the following
2N
Output extension Special function
block block
8 points FX
2N
Extension blocks to be added
(Special function block 1unit + output
Output extension Special function
block block
8 points FX
2N
Priority 2
Priority 1
6.5 Expansion of Main Unit
Output extension
block
-2AD 8 points
8 points)
Output extension
block
8 points
-2AD
Priority 2
-64CCL (priority
3U
81
1
2
3
4
5
6
7
8
9
10