FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
90
6 Examination of System Configuration
6.5 Expansion of Main Unit (Calculation of Current Consumption)
6.5.3 Quick reference matrix [when only input/output devices are added] (DC Power Type)
The following matrix shows the expandable units up to the { mark, where the desired inputs (horizontal axis)
and outputs (vertical axis) intersect. System are expandable up to
z mark when the supply voltage is 16.8V to
19.2V.
Caution
When FX
2N-8ER and FX2N-8ER-ES/UL are added, refer to Subsection 6.5.4.
Select the input/output extension block (number of points) to be connected
to the main unit
The DC power type main units have restrictions in expandable I/O points since they lack a built-in service
power supply.
DC power supply/DC input type
1) FX
3U-16MR/DS, FX3U-16MT/DS, FX3U-16MT/DSS, FX3U-32MR/DS, FX3U-32MT/DS,
FX
3U-32MT/DSS
(These main units do not have a built-in 24V DC service power supply.)
(Example)
When adding 16 inputs to FX
3U
-16/32M
îš…
/D
îš…
, a maximum of 32 outputs are expandable.
Note : When adding 16 inputs under the supply voltage 16.8V to 19.2V, a maximum of 16
outputs are expandable.
2) FX
3U-48MR/DS, FX3U-48MT/DS, FX3U-48MT/DSS, FX3U-64MR/DS, FX3U-64MT/DS,
FX3U-64MT/DSS, FX3U-80MR/DS, FX3U-80MT/DS, FX3U-80MT/DSS
(These main units do not have a built-in 24V DC service power supply.)
(Example)
When adding 32 inputs to FX
3U
-48~80M
îš…
/D
îš…
, a maximum of 40 outputs are expandable.
Note : When adding 32 inputs under the supply voltage 16.8V to 19.2V, a maximum of 24
outputs are expandable.
DC power supply
DC input type
FX
3U
-16M
îš…
/D
îš…
FX
3U
-32M
îš…
/D
îš…
0 8 16 24 32
Number of added points
Output

24
  
16
   
8
-
   
0

î™»

î™»
î™»
î™»
î™»
î™»

î™»

î™»
î™»
î™»
î™»
î™» î™»
40
32
Input
40 48 56 64
(Example)
Number of
added points
Not allowed to add
FX
3U
-48M
îš…
/D
îš…
FX
3U
-64M
îš…
/D
îš…
FX
3U
-80M
îš…
/D
îš…
DC power supply
DC input type
      
16
       
8
-
       
0
   
32
    
24
 
40

48
0 8 16 24 32 40 48 56 64
Input
Output
   
72 80 88 96
î™» î™» î™»
î™» î™» î™»
î™» î™» î™»
î™» î™» î™»
î™» î™» î™»
î™» î™» î™»
î™» î™»
î™»
56
64
Number of added points
(Example)
Number of
added points
Not allowed to add
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