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6 Examination of System Configuration
6.6 Expansion of FX2N Series I/O Powered Extension Unit
84
FX3G Series Programmable Controllers
User's Manual - Hardware Edition
6.6.2 When special extension devices are also added (calculation of current
consumption)
1 Select an input/output powered extension unit.
→ For the data on the number of input/output occupied points and current consumption of each type,
refer to Section 6.8.
2 Enter the specifications for the products to be added.
Enter the data for the input/output extension blocks and special function blocks to be connected to
the input/output powered extension unit, and calculate the current.
→ For data on the number of input/output occupied points and current consumption of each type,
refer to Section 6.8.
*1. When connecting the FX
3U-1PSU-5V extension power supply unit to a system where the nearest
upstream unit to the FX3U-1PSU-5V is input/output powered extension unit, also enter the current
consumption and number of occupied I/O points for the input extension blocks (including FX
2N-8ER-
ES/UL and FX
2N-8ER) that are connected to the FX3U-1PSU-5V.
*2. A maximum of 8 special function blocks are connectable, including the main unit and extension power
supply unit.
Power supply
classification
Classification
Number of
connected units
Type
Number of input/
output points
[points]
Capacity of built-in power supply
5V DC power
supply [mA]
24V DC service
power supply
[mA]
With built-in
power
supply
Input/output
powered
extension unit
-FX2N-
Example of entry FX
2N-48ER-ES/UL 48 690 460
Power supply
classification
Classification
Number of
connected
units
Type
Number of input/
output points
[points]
Calculation of current consumption
of built-in power supply
5V DC power
supply [mA]
24V DC power
supply [mA]
Enter the
products
connected to
the input/
output powered
extension unit
Input/output
extension
block
*1
-
FX2N- -
FX2N- -
FX2N- -
FX2N- -
FX
2N- -
FX2N- -
FX2N- -
FX2N- -
Special
function
unit/block
8
*2
FX2N/FX3U-
FX2N/FX3U-
FX2N/FX3U-
FX2N/FX3U-
FX
2N/FX3U-
FX
2N/FX3U-
FX
2N/FX3U-
FX2N/FX3U-
Calculate the totals
1
1 -1 1 -2
1 -3
B1
2
B2
C
2 -1 2 -2 2 -3