FX
3U
Series Programmable Controllers
User’s Manual - Hardware Edition
106
6 Examination of System Configuration
6.5 Expansion of Main Unit (Calculation of Current Consumption)
4
Determine whether the devices can be connected to the main unit.
Calculate the current to confirm whether the selected extension devices can be connected.
1. Calculate the current consumption at startup.
2. Calculate the current consumption of the internal 24V DC.
The positive value from the calculation means it is expandable
.
3. Calculate the current consumption of the built-in 5V DC power supply
.
If the calculation results for the current consumption for the startup, the internal 24V DC power supply and 5V
DC power supply are negative values, the current consumption exceeds the capacity of the built-in power
supply.
Reexamine the system configuration adding input/output powered extension units.
→
Refer to Section 6.6 "Expansion of FX2N Series I/O Powered Extension Unit (Calculation of Current
Consumption)".
Main unit
Total of current
consumed by
extension devices
Current consumption
at startup [mA]
Current supply at
startup [mA]
Calculation result
mA
-
mA
1
-2
2
-2
mA
≥
0mA
=
Main unit
Total of current
consumed by
extension devices
Current
consumprion
Power supply
capacity for
internal 24V DC
Calculation result
mA
-
mA
1
-4
2
-4
mA
≥
0mA
=
Main unit
Total of current
consumed by
extension devices
mA
-
mA
1
-3
2
-3
mA
≥
0mA
=
Current
consumption
Capacity of 5V DC
power supply
Calculation result
Summary of Contents for FX2-16E series
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Page 8: ... 6 Safety Precautions Read these precautions before use MEMO ...
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