Expansion Of Fx2N Series I/O Powered Extension Unit (Calculation Of Current Consumption); Quick Reference Matrix (When Only Input/Output Devices Are Added) - Mitsubishi FX3U SERIES User Manual

FX Series Programmable Controllers
3U
User's Manual - Hardware Edition
6.6 Expansion of FX
Current Consumption)
If the selected devices in the previous section cannot be connected due to a shortage of current from the
main unit's built-in 24V DC sercive power supply, add an input/output powered extension unit.
Since input/output powered extension units have built-in input/output terminals, reexamine the input/output
devices connected to the main unit to ensure the required number of points.
Before
selection
After
selection
Determine whether extension devices can be connected to the input/output powered extension unit by the
following method.
• When only input/output extension devices are added, use the quick reference matrix.
→ Refer to Subsection 6.6.1 "Quick reference matrix (when only input/output devices are added)".
• When also special extension devices are added, calculate the current consumption to ensure that the total
current to be consumed by the added extension devices can be supplied by the built-in power supply.
→ Refer to Subsection 6.6.2 "When special extension devices are also added (calculation of current
6.6.1

Quick reference matrix (when only input/output devices are added)

In the following quick reference matrix, the value at the intersection of the number of input points to be added
(horizontal axis) with the number of output points to be added (vertical axis) indicates the remaining power
supply capacity.
1
Select the input/output extension block (number of points) to be connected
to the main unit.
Check that the number of input/output points can be added.
When connecting the FX
upstream unit to the FX
consumption by the input extension blocks (including FX
to the FX -1PSU-5V when calculating the total current consumption of the input/output powered
3U
extension unit.
1. AC power supply/DC input type
1) FX -32ER, FX
2N
FX -32ER-ES/UL, FX
2N
AC power supply
DC input type
FX -32E
2N
(Example) When a 16-input and 0-output point extension block is connected to FX
94

6.6 Expansion of FX2N Series I/O Powered Extension Unit (Calculation of Current Consumption)

Series I/O Powered Extension Unit (Calculation of
2N
Input/output
Main unit extension
block
Input/output
Main unit extension
block
-1PSU-5V extension power supply unit to a system where the nearest
3U
-1PSU-5V is an input/output powered extension unit, include the current
3U
-32ET, FX -32ES
2N 2N
-32ET-ESS/UL
2N
Output
24 25
16 100 50
8 175 125
0
250 200
0 8
Number of added points
of the 24V DC service power supply becomes 150 mA or less.
Range to be covered by main unit
Range exceeding power supply capacity
Input extension
Special
function block block (16 points)
Input/output powered
Special
extension unit
function block
(32 points)
Replaced with input/output powered
extension unit
-8ER-ES/UL and FX
2N
(Example)
0
75 25
150 100 50
16 24 32
Input
6 Examination of System Configuration
Output extension
Special
block (16 points) function block
Special
function block
consumption)".
-8ER) connected
2N
-32E , the current
2N